Balać, M., Tanasković, J., Kastratović, G.,& Mirkov, N.. (2023). Kočioni mehanizam kolica za za zemaljsko opsluživanje vazduhoplova. in www.mas.bg.ac.rs.
https://hdl.handle.net/21.15107/rcub_machinery_7394

Balać M, Tanasković J, Kastratović G, Mirkov N. Kočioni mehanizam kolica za za zemaljsko opsluživanje vazduhoplova. in www.mas.bg.ac.rs. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7394 .

Balać, Martina, Tanasković, Jovan, Kastratović, Gordana, Mirkov, Nikola, "Kočioni mehanizam kolica za za zemaljsko opsluživanje vazduhoplova" in www.mas.bg.ac.rs (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7394 .

TY  - CONF
AU  - Balać, Martina
AU  - Grbović, Aleksandar
AU  - Sarvaš, Lajoš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7229
AB  - Numerical analysis of protective bellows attached to aluminum frames of pivoting joints is presented in this
research. Five aluminum frames connected by protective bellows are attached to the circular rod and have
been extracted from the original geometry of passenger bridge used on ocean cruisers. It was assumed that
the circular rod was fixed since the main emphasis in the analysis was on the displacements and stresses of
aluminium frames, not rods. The main load considered in the analysis was a force of 2,500 N (simulating the
mass of 250 kg) acting perpendicularly to three middle frames. Three frames were loaded since it had been
estimated that an average person can apply pressure (with his/her body) on a maximum of three frames at
once. The mass of 250 kg was used in calculations to ensure the value of safety factor =2.5. Since no data
were available about the type of contact between the rod and ends of frames, two approaches were used in
the analysis: firstly, contact was considered to be sliding without friction, and secondly contact was considered
to be sliding with friction with the value of friction coefficient =0.2. Values of displacements and stresses
obtained using finite element analyses (FEA) for both approaches and both positions of frames (firm 0 and
max. angle45) are shown and discussed.
PB  - University of Belgrade - Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 PROGRAMME AND THE BOOK OF ABSTRACTS
T1  - ANALYSIS OF THE CONTRIBUTION OF PROTECTIVE BELLOWS ON THE STABILITY OF ALUMINUM FRAMES USED IN PIVOTING JOINT
SP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7229
ER  - 

@conference{
author = "Balać, Martina and Grbović, Aleksandar and Sarvaš, Lajoš",
year = "2023",
abstract = "Numerical analysis of protective bellows attached to aluminum frames of pivoting joints is presented in this
research. Five aluminum frames connected by protective bellows are attached to the circular rod and have
been extracted from the original geometry of passenger bridge used on ocean cruisers. It was assumed that
the circular rod was fixed since the main emphasis in the analysis was on the displacements and stresses of
aluminium frames, not rods. The main load considered in the analysis was a force of 2,500 N (simulating the
mass of 250 kg) acting perpendicularly to three middle frames. Three frames were loaded since it had been
estimated that an average person can apply pressure (with his/her body) on a maximum of three frames at
once. The mass of 250 kg was used in calculations to ensure the value of safety factor =2.5. Since no data
were available about the type of contact between the rod and ends of frames, two approaches were used in
the analysis: firstly, contact was considered to be sliding without friction, and secondly contact was considered
to be sliding with friction with the value of friction coefficient =0.2. Values of displacements and stresses
obtained using finite element analyses (FEA) for both approaches and both positions of frames (firm 0 and
max. angle45) are shown and discussed.",
publisher = "University of Belgrade - Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 PROGRAMME AND THE BOOK OF ABSTRACTS",
title = "ANALYSIS OF THE CONTRIBUTION OF PROTECTIVE BELLOWS ON THE STABILITY OF ALUMINUM FRAMES USED IN PIVOTING JOINT",
pages = "10",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7229"
}

Balać, M., Grbović, A.,& Sarvaš, L.. (2023). ANALYSIS OF THE CONTRIBUTION OF PROTECTIVE BELLOWS ON THE STABILITY OF ALUMINUM FRAMES USED IN PIVOTING JOINT. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 PROGRAMME AND THE BOOK OF ABSTRACTS
University of Belgrade - Faculty of Mechanical Engineering., 10.
https://hdl.handle.net/21.15107/rcub_machinery_7229

Balać M, Grbović A, Sarvaš L. ANALYSIS OF THE CONTRIBUTION OF PROTECTIVE BELLOWS ON THE STABILITY OF ALUMINUM FRAMES USED IN PIVOTING JOINT. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 PROGRAMME AND THE BOOK OF ABSTRACTS. 2023;:10.
https://hdl.handle.net/21.15107/rcub_machinery_7229 .

Balać, Martina, Grbović, Aleksandar, Sarvaš, Lajoš, "ANALYSIS OF THE CONTRIBUTION OF PROTECTIVE BELLOWS ON THE STABILITY OF ALUMINUM FRAMES USED IN PIVOTING JOINT" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 PROGRAMME AND THE BOOK OF ABSTRACTS (2023):10,
https://hdl.handle.net/21.15107/rcub_machinery_7229 .

TY  - CONF
AU  - Manić, Nebojša
AU  - Balać, Martina
AU  - Stojiljković, Dragoslava
AU  - Janković, Bojan
AU  - Stanisavljević, Zorana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6054
AB  - Rapid industrialization together with issues over the depletion of traditional fuel supplies and environmental concerns have prompted researchers to look into developing an environmentally safe, renewable, costeffective, and long-term alternative energy source. Agriculture biomass is recognized as a potentially viable solution for utilization in the energy sector for achieving the sustainable and long-term transformation into energy and/or fuels. This type of biomass is generated in large amounts across the world, which may be converted to biofuels using a variety of methods. However, concerns related to the competing agricultural biomass applications need to be thoroughly examined taking into account both the short- and long-term actuality, and its impact on the soil by conversion to biofuels. According to common practice agricultural
biomass is dominantly used for biogas production due to its availability and simplicity of handling. Based on all mentioned the assessment of the most applicable raw materials for biogas production is essential for achieving
the sustainability criteria and promoting using biomass for energy production. In this paper, a theoretical approach was applied for experimentally obtained results of proximate and ultimate analysis of different biomass materials as a possible feedstock for biomass production. Based on data of proximate and ultimate analysis the theoretical biomechanical methane potential (TBMP) for considered samples was calculated. According to obtained results, agricultural biomass shows validity of use for biogas production considering the fulfillment of the raw material minimum quantity.
PB  - Innovation Center of Faculty of Mechanical Engineering, Belgrade
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2022
T1  - Theoretical assesment of raw materials for sustainable biogas production
SP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6054
ER  - 

@conference{
author = "Manić, Nebojša and Balać, Martina and Stojiljković, Dragoslava and Janković, Bojan and Stanisavljević, Zorana",
year = "2022",
abstract = "Rapid industrialization together with issues over the depletion of traditional fuel supplies and environmental concerns have prompted researchers to look into developing an environmentally safe, renewable, costeffective, and long-term alternative energy source. Agriculture biomass is recognized as a potentially viable solution for utilization in the energy sector for achieving the sustainable and long-term transformation into energy and/or fuels. This type of biomass is generated in large amounts across the world, which may be converted to biofuels using a variety of methods. However, concerns related to the competing agricultural biomass applications need to be thoroughly examined taking into account both the short- and long-term actuality, and its impact on the soil by conversion to biofuels. According to common practice agricultural
biomass is dominantly used for biogas production due to its availability and simplicity of handling. Based on all mentioned the assessment of the most applicable raw materials for biogas production is essential for achieving
the sustainability criteria and promoting using biomass for energy production. In this paper, a theoretical approach was applied for experimentally obtained results of proximate and ultimate analysis of different biomass materials as a possible feedstock for biomass production. Based on data of proximate and ultimate analysis the theoretical biomechanical methane potential (TBMP) for considered samples was calculated. According to obtained results, agricultural biomass shows validity of use for biogas production considering the fulfillment of the raw material minimum quantity.",
publisher = "Innovation Center of Faculty of Mechanical Engineering, Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2022",
title = "Theoretical assesment of raw materials for sustainable biogas production",
pages = "35",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6054"
}

Manić, N., Balać, M., Stojiljković, D., Janković, B.,& Stanisavljević, Z.. (2022). Theoretical assesment of raw materials for sustainable biogas production. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2022
Innovation Center of Faculty of Mechanical Engineering, Belgrade., 35.
https://hdl.handle.net/21.15107/rcub_machinery_6054

Manić N, Balać M, Stojiljković D, Janković B, Stanisavljević Z. Theoretical assesment of raw materials for sustainable biogas production. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2022. 2022;:35.
https://hdl.handle.net/21.15107/rcub_machinery_6054 .

Manić, Nebojša, Balać, Martina, Stojiljković, Dragoslava, Janković, Bojan, Stanisavljević, Zorana, "Theoretical assesment of raw materials for sustainable biogas production" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2022 (2022):35,
https://hdl.handle.net/21.15107/rcub_machinery_6054 .

TY  - JOUR
AU  - Raičević, Nikola
AU  - Petrašinović, Danilo
AU  - Grbović, Aleksandar
AU  - Petrašinović, Miloš
AU  - Balać, Martina
AU  - Petrović, Mihailo
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6045
AB  - Wind turbines are structures that transform wind energy into other types of energy. In the modern age, wind turbines are closely related to the production of electricity and are considered starters of the green industry. Designing this type of construction is a complex and demanding process. Wind turbine
blades are the most important part of the construction and are usually made of
composite materials that meet the requirements of strength as well as aerodynamic requirements. Due to the high cost of composite materials, numerical modeling programs are very important because they allow the structure to be inspected before production, as well as to identify possible errors and weaknesses. In this way, additional manufacturing costs are avoided and a fully optimized structure is obtained. The finite element method (FEM) is a reliable method that allows the structure to be tested for the occurrence of normal and shear stresses that can lead to unwanted values of deformations on the blade. In this paper, the procedure of static analysis of a wind turbine blade is presented and the results that are important for optimizing the blade structure are analyzed. The purpose of FEM analysis is to find critical sections of the blade and to predict where maximum values of stresses may occur. In this way, it can be concluded whether the chosen material is appropriate and how the structure can be further optimized.
PB  - Springer Cham
T2  - Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022.
T1  - The wind speed impact on stress and deformation of composite wind turbine blade
EP  - 120
SP  - 114
DO  - 10.1007/978-3-031-19499-3_6
ER  - 

@article{
author = "Raičević, Nikola and Petrašinović, Danilo and Grbović, Aleksandar and Petrašinović, Miloš and Balać, Martina and Petrović, Mihailo",
year = "2022",
abstract = "Wind turbines are structures that transform wind energy into other types of energy. In the modern age, wind turbines are closely related to the production of electricity and are considered starters of the green industry. Designing this type of construction is a complex and demanding process. Wind turbine
blades are the most important part of the construction and are usually made of
composite materials that meet the requirements of strength as well as aerodynamic requirements. Due to the high cost of composite materials, numerical modeling programs are very important because they allow the structure to be inspected before production, as well as to identify possible errors and weaknesses. In this way, additional manufacturing costs are avoided and a fully optimized structure is obtained. The finite element method (FEM) is a reliable method that allows the structure to be tested for the occurrence of normal and shear stresses that can lead to unwanted values of deformations on the blade. In this paper, the procedure of static analysis of a wind turbine blade is presented and the results that are important for optimizing the blade structure are analyzed. The purpose of FEM analysis is to find critical sections of the blade and to predict where maximum values of stresses may occur. In this way, it can be concluded whether the chosen material is appropriate and how the structure can be further optimized.",
publisher = "Springer Cham",
journal = "Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022.",
title = "The wind speed impact on stress and deformation of composite wind turbine blade",
pages = "120-114",
doi = "10.1007/978-3-031-19499-3_6"
}

Raičević, N., Petrašinović, D., Grbović, A., Petrašinović, M., Balać, M.,& Petrović, M.. (2022). The wind speed impact on stress and deformation of composite wind turbine blade. in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022.
Springer Cham., 114-120.
https://doi.org/10.1007/978-3-031-19499-3_6

Raičević N, Petrašinović D, Grbović A, Petrašinović M, Balać M, Petrović M. The wind speed impact on stress and deformation of composite wind turbine blade. in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022.. 2022;:114-120.
doi:10.1007/978-3-031-19499-3_6 .

Raičević, Nikola, Petrašinović, Danilo, Grbović, Aleksandar, Petrašinović, Miloš, Balać, Martina, Petrović, Mihailo, "The wind speed impact on stress and deformation of composite wind turbine blade" in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. (2022):114-120,
https://doi.org/10.1007/978-3-031-19499-3_6 . .

TY  - GEN
AU  - Tanasković, Jovan
AU  - Mitić, Saša
AU  - Popović, Vladimir
AU  - Đurković, Marija
AU  - Balać, Martina
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6014
AB  - Tehničko rešenje pripada oblasti mašinstva – specijalnih motornih i priklјučnih vozila. Odnosi se na jedan od domena aktivnosti u okviru istraživanja podržanog od strane Ministarstva prosvete, nauke i tehnološkog razvoja Vlade Republike Srbije po ugovoru 451-03-9/2021-14/200105 – domen specijalnih drumskih vozila. Shodno tome, tehničko rešenje rešava problem transporta teških inženjerskih mašina, borbenih vozila i kontejnera u MO, Vojsci Srbije. Poluprikolica omogućava prevoz tereta dužina do 8700/9500 mm i mase do 30 t. Noseća struktura poluprikolice razvijena je u skladu sa tehničkim zahtevima naručioca i važećim standardima. Provera čvrstoće noseće strukture urađena je metodom konačnih elemenata korišćenjem adekvatnih softverskih paketa, a testiranje kompletne konstrukcije izvršeno je od strane korisnika Ministarstva odbrane Republike Srbije, a u prisustvu predstavnika proizvođača.
PB  - Odluka Nastavno-naučnog veća Mašinskog fakultete br. 836/3 od 29.06.2022. i Odluka MNO od 20.09.2022
T2  - Univerzitet u Beogradu Mašinski fakultet
T1  - Noseća struktura poluprikolice za prevoz inženjerskih mašina, borbenih vozila i kontejnera NPP-30
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6014
ER  - 

@misc{
author = "Tanasković, Jovan and Mitić, Saša and Popović, Vladimir and Đurković, Marija and Balać, Martina",
year = "2022",
abstract = "Tehničko rešenje pripada oblasti mašinstva – specijalnih motornih i priklјučnih vozila. Odnosi se na jedan od domena aktivnosti u okviru istraživanja podržanog od strane Ministarstva prosvete, nauke i tehnološkog razvoja Vlade Republike Srbije po ugovoru 451-03-9/2021-14/200105 – domen specijalnih drumskih vozila. Shodno tome, tehničko rešenje rešava problem transporta teških inženjerskih mašina, borbenih vozila i kontejnera u MO, Vojsci Srbije. Poluprikolica omogućava prevoz tereta dužina do 8700/9500 mm i mase do 30 t. Noseća struktura poluprikolice razvijena je u skladu sa tehničkim zahtevima naručioca i važećim standardima. Provera čvrstoće noseće strukture urađena je metodom konačnih elemenata korišćenjem adekvatnih softverskih paketa, a testiranje kompletne konstrukcije izvršeno je od strane korisnika Ministarstva odbrane Republike Srbije, a u prisustvu predstavnika proizvođača.",
publisher = "Odluka Nastavno-naučnog veća Mašinskog fakultete br. 836/3 od 29.06.2022. i Odluka MNO od 20.09.2022",
journal = "Univerzitet u Beogradu Mašinski fakultet",
title = "Noseća struktura poluprikolice za prevoz inženjerskih mašina, borbenih vozila i kontejnera NPP-30",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6014"
}

Tanasković, J., Mitić, S., Popović, V., Đurković, M.,& Balać, M.. (2022). Noseća struktura poluprikolice za prevoz inženjerskih mašina, borbenih vozila i kontejnera NPP-30. in Univerzitet u Beogradu Mašinski fakultet
Odluka Nastavno-naučnog veća Mašinskog fakultete br. 836/3 od 29.06.2022. i Odluka MNO od 20.09.2022..
https://hdl.handle.net/21.15107/rcub_machinery_6014

Tanasković J, Mitić S, Popović V, Đurković M, Balać M. Noseća struktura poluprikolice za prevoz inženjerskih mašina, borbenih vozila i kontejnera NPP-30. in Univerzitet u Beogradu Mašinski fakultet. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_6014 .

Tanasković, Jovan, Mitić, Saša, Popović, Vladimir, Đurković, Marija, Balać, Martina, "Noseća struktura poluprikolice za prevoz inženjerskih mašina, borbenih vozila i kontejnera NPP-30" in Univerzitet u Beogradu Mašinski fakultet (2022),
https://hdl.handle.net/21.15107/rcub_machinery_6014 .

TY  - CHAP
AU  - Raičević, Nikola
AU  - Petrašinović, Danilo
AU  - Grbović, Aleksandar
AU  - Petrašinović, Miloš
AU  - Balać, Martina
AU  - Petrović, Mihailo
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5554
AB  - Wind turbines are structures that transform wind energy into other types of energy. In the modern age, wind turbines are closely related to the production of electricity and are considered starters of the green industry. Designing this type of construction is a complex and demanding process. Wind turbine blades are the most important part of the construction and are usually made of composite materials that meet the requirements of strength as well as aerodynamic requirements. Due to the high cost of composite materials, numerical modeling programs are very important because they allow the structure to be inspected before production, as well as to identify possible errors and weaknesses. In this way, additional manufacturing costs are avoided and a fully optimized structure is obtained. The finite element method (FEM) is a reliable method that allows the structure to be tested for the occurrence of normal and shear stresses that can lead to unwanted values of deformations on the blade. In this paper, the procedure of static analysis of a wind turbine blade is presented and the results that are important for optimizing the blade structure are analyzed. The purpose of FEM analysis is to find critical sections of the blade and to predict where maximum values of stresses may occur. In this way, it can be concluded whether the chosen material is appropriate and how the structure can be further optimized.
PB  - Springer Nature Switzerland AG
T2  - Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. Lecture Notes in Networks and Systems
T1  - The Wind Speed Impact on Stress and Deformation of Composite Wind Turbine Blade
EP  - 130
SP  - 114
VL  - 564
DO  - 10.1007/978-3-031-19499-3_6
ER  - 

@inbook{
author = "Raičević, Nikola and Petrašinović, Danilo and Grbović, Aleksandar and Petrašinović, Miloš and Balać, Martina and Petrović, Mihailo",
year = "2022",
abstract = "Wind turbines are structures that transform wind energy into other types of energy. In the modern age, wind turbines are closely related to the production of electricity and are considered starters of the green industry. Designing this type of construction is a complex and demanding process. Wind turbine blades are the most important part of the construction and are usually made of composite materials that meet the requirements of strength as well as aerodynamic requirements. Due to the high cost of composite materials, numerical modeling programs are very important because they allow the structure to be inspected before production, as well as to identify possible errors and weaknesses. In this way, additional manufacturing costs are avoided and a fully optimized structure is obtained. The finite element method (FEM) is a reliable method that allows the structure to be tested for the occurrence of normal and shear stresses that can lead to unwanted values of deformations on the blade. In this paper, the procedure of static analysis of a wind turbine blade is presented and the results that are important for optimizing the blade structure are analyzed. The purpose of FEM analysis is to find critical sections of the blade and to predict where maximum values of stresses may occur. In this way, it can be concluded whether the chosen material is appropriate and how the structure can be further optimized.",
publisher = "Springer Nature Switzerland AG",
journal = "Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. Lecture Notes in Networks and Systems",
booktitle = "The Wind Speed Impact on Stress and Deformation of Composite Wind Turbine Blade",
pages = "130-114",
volume = "564",
doi = "10.1007/978-3-031-19499-3_6"
}

Raičević, N., Petrašinović, D., Grbović, A., Petrašinović, M., Balać, M.,& Petrović, M.. (2022). The Wind Speed Impact on Stress and Deformation of Composite Wind Turbine Blade. in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. Lecture Notes in Networks and Systems
Springer Nature Switzerland AG., 564, 114-130.
https://doi.org/10.1007/978-3-031-19499-3_6

Raičević N, Petrašinović D, Grbović A, Petrašinović M, Balać M, Petrović M. The Wind Speed Impact on Stress and Deformation of Composite Wind Turbine Blade. in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. Lecture Notes in Networks and Systems. 2022;564:114-130.
doi:10.1007/978-3-031-19499-3_6 .

Raičević, Nikola, Petrašinović, Danilo, Grbović, Aleksandar, Petrašinović, Miloš, Balać, Martina, Petrović, Mihailo, "The Wind Speed Impact on Stress and Deformation of Composite Wind Turbine Blade" in Experimental Research and Numerical Simulation in Applied Sciences. CNNTech 2022. Lecture Notes in Networks and Systems, 564 (2022):114-130,
https://doi.org/10.1007/978-3-031-19499-3_6 . .

TY  - CONF
AU  - Balać, Martina
AU  - Grbović, Aleksandar
AU  - Kastratović, Gordana
AU  - Petrović, A.
AU  - Sarvas, L.
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3797
AB  - Bridge constructions are developing rapidly as they are necessity in the transport network. The Passenger Boarding Bridge (PBB) provides passengers with means to embark and disembark a ship through weather protected tunnels. It is obvious that the endurance and safety of such structures are of paramount importance. It has been shown that forces and moments at three-tunnel boarding bridge supports were high in the critical cases, as well as stresses in pins and lugs. The aim of this research is to analyze crack propagation in the damaged supporting part of the PBB. After determination of critical components to demonstrate how dangerous the appearance of the crack could be and to evaluate the fatigue life of the damaged supporting part, numerical simulations based on the improved finite element method (FEM) were carried out. To do this, the determination of actual loads was conducted with special consideration. The predicted number of cycles to complete failure was low, indicating the fact that special attention has to be paid on the design of PBB’s critical supporting components.
PB  - Springer Science and Business Media Deutschland GmbH
C3  - Lecture Notes in Networks and Systems
T1  - Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports
EP  - 318
SP  - 299
VL  - 323
DO  - 10.1007/978-3-030-86009-7_16
ER  - 

@conference{
author = "Balać, Martina and Grbović, Aleksandar and Kastratović, Gordana and Petrović, A. and Sarvas, L.",
year = "2022",
abstract = "Bridge constructions are developing rapidly as they are necessity in the transport network. The Passenger Boarding Bridge (PBB) provides passengers with means to embark and disembark a ship through weather protected tunnels. It is obvious that the endurance and safety of such structures are of paramount importance. It has been shown that forces and moments at three-tunnel boarding bridge supports were high in the critical cases, as well as stresses in pins and lugs. The aim of this research is to analyze crack propagation in the damaged supporting part of the PBB. After determination of critical components to demonstrate how dangerous the appearance of the crack could be and to evaluate the fatigue life of the damaged supporting part, numerical simulations based on the improved finite element method (FEM) were carried out. To do this, the determination of actual loads was conducted with special consideration. The predicted number of cycles to complete failure was low, indicating the fact that special attention has to be paid on the design of PBB’s critical supporting components.",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Lecture Notes in Networks and Systems",
title = "Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports",
pages = "318-299",
volume = "323",
doi = "10.1007/978-3-030-86009-7_16"
}

Balać, M., Grbović, A., Kastratović, G., Petrović, A.,& Sarvas, L.. (2022). Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports. in Lecture Notes in Networks and Systems
Springer Science and Business Media Deutschland GmbH., 323, 299-318.
https://doi.org/10.1007/978-3-030-86009-7_16

Balać M, Grbović A, Kastratović G, Petrović A, Sarvas L. Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports. in Lecture Notes in Networks and Systems. 2022;323:299-318.
doi:10.1007/978-3-030-86009-7_16 .

Balać, Martina, Grbović, Aleksandar, Kastratović, Gordana, Petrović, A., Sarvas, L., "Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports" in Lecture Notes in Networks and Systems, 323 (2022):299-318,
https://doi.org/10.1007/978-3-030-86009-7_16 . .

TY  - CONF
AU  - Balać, Martina
AU  - Grbović, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6063
AB  - Port bay bridge (PBB) presents unique challenges in design and construction compared to the conventional bridge. This research aims to present a 3D finite element analysis of the PBB supports. At all points of supporting parts (wheels, plate, and pin) where one tunnel is in a contact with another tunnel, the same
supporting elements are used, and what differs at these points are loads that have to be carried. Since it is expected that pins will be the load-carrying elements with the highest stress, the safety factors will be evaluated according to the stress calculated on pins. Reactions forces will be applied on both wheels equally; that is, any reaction force must be divided by two first (since there is pair of supports at all points), and then obtained value must be divided again by two (since there are two wheels on each support). The moment on the pin equals zero when F1 and F2 are equal (this is an ideal case); otherwise, the twisting moment (torque) occurs. Possible values of twisting moments are also analyzed and presented later in this paper.
PB  - Innovation Center of Faculty of Mechanical Engineering Belgrade
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2021
T1  - FE analysis of the support assembly of the port bay bridge
SP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6063
ER  - 

@conference{
author = "Balać, Martina and Grbović, Aleksandar",
year = "2021",
abstract = "Port bay bridge (PBB) presents unique challenges in design and construction compared to the conventional bridge. This research aims to present a 3D finite element analysis of the PBB supports. At all points of supporting parts (wheels, plate, and pin) where one tunnel is in a contact with another tunnel, the same
supporting elements are used, and what differs at these points are loads that have to be carried. Since it is expected that pins will be the load-carrying elements with the highest stress, the safety factors will be evaluated according to the stress calculated on pins. Reactions forces will be applied on both wheels equally; that is, any reaction force must be divided by two first (since there is pair of supports at all points), and then obtained value must be divided again by two (since there are two wheels on each support). The moment on the pin equals zero when F1 and F2 are equal (this is an ideal case); otherwise, the twisting moment (torque) occurs. Possible values of twisting moments are also analyzed and presented later in this paper.",
publisher = "Innovation Center of Faculty of Mechanical Engineering Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2021",
title = "FE analysis of the support assembly of the port bay bridge",
pages = "44",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6063"
}

Balać, M.,& Grbović, A.. (2021). FE analysis of the support assembly of the port bay bridge. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2021
Innovation Center of Faculty of Mechanical Engineering Belgrade., 44.
https://hdl.handle.net/21.15107/rcub_machinery_6063

Balać M, Grbović A. FE analysis of the support assembly of the port bay bridge. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2021. 2021;:44.
https://hdl.handle.net/21.15107/rcub_machinery_6063 .

Balać, Martina, Grbović, Aleksandar, "FE analysis of the support assembly of the port bay bridge" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2021 (2021):44,
https://hdl.handle.net/21.15107/rcub_machinery_6063 .

TY  - CHAP
AU  - Maksimović, Katarina
AU  - Posavljak, S.
AU  - Maksimović, Mirko S.
AU  - Vasovic Maksimović, Ivana
AU  - Balać, Martina
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3680
AB  - This work presents total fatigue life prediction methodology of aircraft structural components under general load spectrum. Here is presented an effective computation procedure, that combines the finite element method (FEM) and strain-life methods to predict fatigue crack initiation life and fatigue crack growth model based on the strain energy density (SED) method. To validate computation procedure in this paper has been experimental tested specimens with a central hole under load spectrum in form of blocks. Total fatigue life of these specimens, defined as sum of crack initiation and crack growth life, was experimentally determined. Crack initiation life was computed using the theory of low cycle fatigue. Computation of crack initiation life was realized using Palmgreen-Miner’s linear rule of damage accumulation, applied on Morrow’s curves of low cycle fatigue. Crack growth life was computed using strain energy density (SED) method. The same low cyclic material properties of quenched and tempered steel 13H11N2V2MF, used for crack initiation life computation, were used for crack growth life computation. Residual life estimation of cracked duraluminum aircraft wing skin/plate 2219-T851 under multiple overload/underload load spectrum was considered too. Presented computation results were compared with own and available experimentally obtained results.
PB  - Springer
T2  - Lecture Notes in Networks and Systems
T1  - Total fatigue life estimation of aircraft structural components under general load spectra
EP  - 412
SP  - 394
VL  - 153
DO  - 10.1007/978-3-030-58362-0_23
ER  - 

@inbook{
author = "Maksimović, Katarina and Posavljak, S. and Maksimović, Mirko S. and Vasovic Maksimović, Ivana and Balać, Martina",
year = "2021",
abstract = "This work presents total fatigue life prediction methodology of aircraft structural components under general load spectrum. Here is presented an effective computation procedure, that combines the finite element method (FEM) and strain-life methods to predict fatigue crack initiation life and fatigue crack growth model based on the strain energy density (SED) method. To validate computation procedure in this paper has been experimental tested specimens with a central hole under load spectrum in form of blocks. Total fatigue life of these specimens, defined as sum of crack initiation and crack growth life, was experimentally determined. Crack initiation life was computed using the theory of low cycle fatigue. Computation of crack initiation life was realized using Palmgreen-Miner’s linear rule of damage accumulation, applied on Morrow’s curves of low cycle fatigue. Crack growth life was computed using strain energy density (SED) method. The same low cyclic material properties of quenched and tempered steel 13H11N2V2MF, used for crack initiation life computation, were used for crack growth life computation. Residual life estimation of cracked duraluminum aircraft wing skin/plate 2219-T851 under multiple overload/underload load spectrum was considered too. Presented computation results were compared with own and available experimentally obtained results.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Total fatigue life estimation of aircraft structural components under general load spectra",
pages = "412-394",
volume = "153",
doi = "10.1007/978-3-030-58362-0_23"
}

Maksimović, K., Posavljak, S., Maksimović, M. S., Vasovic Maksimović, I.,& Balać, M.. (2021). Total fatigue life estimation of aircraft structural components under general load spectra. in Lecture Notes in Networks and Systems
Springer., 153, 394-412.
https://doi.org/10.1007/978-3-030-58362-0_23

Maksimović K, Posavljak S, Maksimović MS, Vasovic Maksimović I, Balać M. Total fatigue life estimation of aircraft structural components under general load spectra. in Lecture Notes in Networks and Systems. 2021;153:394-412.
doi:10.1007/978-3-030-58362-0_23 .

Maksimović, Katarina, Posavljak, S., Maksimović, Mirko S., Vasovic Maksimović, Ivana, Balać, Martina, "Total fatigue life estimation of aircraft structural components under general load spectra" in Lecture Notes in Networks and Systems, 153 (2021):394-412,
https://doi.org/10.1007/978-3-030-58362-0_23 . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Radojević, Miloš
AU  - Balać, Martina
AU  - Stojiljković, Dragoslava
AU  - Manić, Nebojša
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3307
AB  - The detailed kinetic analysis of slow pyrolysis process of apricot (Prunus armeniaca L.) kernal shells has been estimated, under non-isothermal conditions, through thermogravimetric analysis and derivative thermogravimetry. Thermal decomposition was implemented using four different heating rates (5, 10, 15, and 20 degrees C per minute), with consideration of how this parameter effects on the process kinetics. The higher heating rates provoke the shift of thermoanalytical curves towards more elevated temperatures. Using isoconversional differential method, the variation of activation energy, Ea, with conversion fraction, a, was detected, and pyrolysis reaction profile was discussed. After resolving the pyrolysis rate curves of individual biomass constituents, the temperature and conversion ranges of their thermal transformations were clearly identified. In the latter stage of analysis, every identified reaction step was considered through mechanistic description, which involves selection of the appropriate kinetic model function. The comparison of the results as well as discrepancies between them has been discussed. The corresponding rate-law equations related to thermal decomposition reactions of all biomass constituents present in the tested agricultural waste material have been identified.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Thermogravimetric study on the pyrolysis kinetic mechanism of waste biomass from fruit processing industry
EP  - 4239
IS  - 6
SP  - 4221
VL  - 24
DO  - 10.2298/TSCI200213191J
ER  - 

@article{
author = "Janković, Bojan and Radojević, Miloš and Balać, Martina and Stojiljković, Dragoslava and Manić, Nebojša",
year = "2020",
abstract = "The detailed kinetic analysis of slow pyrolysis process of apricot (Prunus armeniaca L.) kernal shells has been estimated, under non-isothermal conditions, through thermogravimetric analysis and derivative thermogravimetry. Thermal decomposition was implemented using four different heating rates (5, 10, 15, and 20 degrees C per minute), with consideration of how this parameter effects on the process kinetics. The higher heating rates provoke the shift of thermoanalytical curves towards more elevated temperatures. Using isoconversional differential method, the variation of activation energy, Ea, with conversion fraction, a, was detected, and pyrolysis reaction profile was discussed. After resolving the pyrolysis rate curves of individual biomass constituents, the temperature and conversion ranges of their thermal transformations were clearly identified. In the latter stage of analysis, every identified reaction step was considered through mechanistic description, which involves selection of the appropriate kinetic model function. The comparison of the results as well as discrepancies between them has been discussed. The corresponding rate-law equations related to thermal decomposition reactions of all biomass constituents present in the tested agricultural waste material have been identified.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Thermogravimetric study on the pyrolysis kinetic mechanism of waste biomass from fruit processing industry",
pages = "4239-4221",
number = "6",
volume = "24",
doi = "10.2298/TSCI200213191J"
}

Janković, B., Radojević, M., Balać, M., Stojiljković, D.,& Manić, N.. (2020). Thermogravimetric study on the pyrolysis kinetic mechanism of waste biomass from fruit processing industry. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 24(6), 4221-4239.
https://doi.org/10.2298/TSCI200213191J

Janković B, Radojević M, Balać M, Stojiljković D, Manić N. Thermogravimetric study on the pyrolysis kinetic mechanism of waste biomass from fruit processing industry. in Thermal Science. 2020;24(6):4221-4239.
doi:10.2298/TSCI200213191J .

Janković, Bojan, Radojević, Miloš, Balać, Martina, Stojiljković, Dragoslava, Manić, Nebojša, "Thermogravimetric study on the pyrolysis kinetic mechanism of waste biomass from fruit processing industry" in Thermal Science, 24, no. 6 (2020):4221-4239,
https://doi.org/10.2298/TSCI200213191J . .

TY  - CONF
AU  - Tanasković, Jovan
AU  - Dragičević, Aleksandra
AU  - Balać, Martina
AU  - Milković, Dragan
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5896
AB  - Manufacturing of railway vehicles require use of many different special support tools which have a role to simplify production process and to increase productivity. Beside, design of these elements requires a special care about worker safety. Subject of this paper is static strength analysis of the mobile lifting platform designed for railway industry. This type of mobile platform is used for worker outside of the wagon body and can provide operation up to 4000 mm. Platform was designed from steel tubes, square and circular cross section joined by welding and moving joints. Hydraulic cylinder, with adequate and controlled initial force, is used for platform lifting and lowering platform. Static strength analysis was done using finite element method by SolidWorks software package. Bearing in mind very complex construction of mobile platform, simplification of numerical model was done. Platform structure was divided in three subassemblies: working platform, folding scissors and lower chassis, and for each of them numerical analyses were performed. In accordance with purchaser requests loads were applied on the working platform, while the reaction force was measured at constraints located on the lower chassis and at the joint between the piston of hydraulic cylinder and scissors structure. Next to primary analysis of the main platform structure, static strength analyses were carried out for fences and stairs. All analyses were accomplished in accordance to valid standards. Obtained results showed that the assemblies of mobile platform, including fences and stairs, are able to withstand load of workers and required equipment without permanent deformation.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - IV International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2020, PROGRAMME AND THE BOOK OF ABSTRACTS
T1  - Static strength analysis of construction of Mobile lifting platform
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5896
ER  - 

@conference{
author = "Tanasković, Jovan and Dragičević, Aleksandra and Balać, Martina and Milković, Dragan",
year = "2020",
abstract = "Manufacturing of railway vehicles require use of many different special support tools which have a role to simplify production process and to increase productivity. Beside, design of these elements requires a special care about worker safety. Subject of this paper is static strength analysis of the mobile lifting platform designed for railway industry. This type of mobile platform is used for worker outside of the wagon body and can provide operation up to 4000 mm. Platform was designed from steel tubes, square and circular cross section joined by welding and moving joints. Hydraulic cylinder, with adequate and controlled initial force, is used for platform lifting and lowering platform. Static strength analysis was done using finite element method by SolidWorks software package. Bearing in mind very complex construction of mobile platform, simplification of numerical model was done. Platform structure was divided in three subassemblies: working platform, folding scissors and lower chassis, and for each of them numerical analyses were performed. In accordance with purchaser requests loads were applied on the working platform, while the reaction force was measured at constraints located on the lower chassis and at the joint between the piston of hydraulic cylinder and scissors structure. Next to primary analysis of the main platform structure, static strength analyses were carried out for fences and stairs. All analyses were accomplished in accordance to valid standards. Obtained results showed that the assemblies of mobile platform, including fences and stairs, are able to withstand load of workers and required equipment without permanent deformation.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "IV International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2020, PROGRAMME AND THE BOOK OF ABSTRACTS",
title = "Static strength analysis of construction of Mobile lifting platform",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5896"
}

Tanasković, J., Dragičević, A., Balać, M.,& Milković, D.. (2020). Static strength analysis of construction of Mobile lifting platform. in IV International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2020, PROGRAMME AND THE BOOK OF ABSTRACTS
Innovation Center of Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_5896

Tanasković J, Dragičević A, Balać M, Milković D. Static strength analysis of construction of Mobile lifting platform. in IV International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2020, PROGRAMME AND THE BOOK OF ABSTRACTS. 2020;.
https://hdl.handle.net/21.15107/rcub_machinery_5896 .

Tanasković, Jovan, Dragičević, Aleksandra, Balać, Martina, Milković, Dragan, "Static strength analysis of construction of Mobile lifting platform" in IV International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2020, PROGRAMME AND THE BOOK OF ABSTRACTS (2020),
https://hdl.handle.net/21.15107/rcub_machinery_5896 .

TY  - CONF
AU  - Elaye, Abdelnaser Abdusalam
AU  - Grbović, Aleksandar
AU  - Balać, Martina
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6062
AB  - Over the last three decades, the use of composites in aviation structures has been increasing. The previous aircraft structure was mostly made of aluminum alloy, and the composites were limited to a level two structure. With increasing experience and confidence, the use of these materials has been extended to major structures. Moreover, composites used in vehicles industry can reduce weight and operating costs, so it is believed that their use will increase further in the near future. The research scope of this study was to develop the optimal
design of a composite structure in the terms of maximum vehicle’s life. To achieve this, several composite designs of a vehicle body were analyzed in Ansys Fluent to get the loads and stresses that can be expected during the service. Then, Helius PFA software for progressive failure analysis has been used. It provides powerful tools for enhanced finite element analysis of composite structures. The validity of the developed model has been investigated and compared with an experimental data collected in the wind tunnel for some composite specimens and for a developed 3D model. Moreover, a comparison study, between experimental and simulation work, was also performed with selected design cases to demonstrate the potential advantages of using the optimal composite structure to maintain fatigue long-life structures.
PB  - Innovation Center of Faculty of Mechanical Engineering, Belgrade
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2019
T1  - Оptimization of composite structure based on fracture analysis
SP  - 3
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6062
ER  - 

@conference{
author = "Elaye, Abdelnaser Abdusalam and Grbović, Aleksandar and Balać, Martina",
year = "2019",
abstract = "Over the last three decades, the use of composites in aviation structures has been increasing. The previous aircraft structure was mostly made of aluminum alloy, and the composites were limited to a level two structure. With increasing experience and confidence, the use of these materials has been extended to major structures. Moreover, composites used in vehicles industry can reduce weight and operating costs, so it is believed that their use will increase further in the near future. The research scope of this study was to develop the optimal
design of a composite structure in the terms of maximum vehicle’s life. To achieve this, several composite designs of a vehicle body were analyzed in Ansys Fluent to get the loads and stresses that can be expected during the service. Then, Helius PFA software for progressive failure analysis has been used. It provides powerful tools for enhanced finite element analysis of composite structures. The validity of the developed model has been investigated and compared with an experimental data collected in the wind tunnel for some composite specimens and for a developed 3D model. Moreover, a comparison study, between experimental and simulation work, was also performed with selected design cases to demonstrate the potential advantages of using the optimal composite structure to maintain fatigue long-life structures.",
publisher = "Innovation Center of Faculty of Mechanical Engineering, Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2019",
title = "Оptimization of composite structure based on fracture analysis",
pages = "3",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6062"
}

Elaye, A. A., Grbović, A.,& Balać, M.. (2019). Оptimization of composite structure based on fracture analysis. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2019
Innovation Center of Faculty of Mechanical Engineering, Belgrade., 3.
https://hdl.handle.net/21.15107/rcub_machinery_6062

Elaye AA, Grbović A, Balać M. Оptimization of composite structure based on fracture analysis. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2019. 2019;:3.
https://hdl.handle.net/21.15107/rcub_machinery_6062 .

Elaye, Abdelnaser Abdusalam, Grbović, Aleksandar, Balać, Martina, "Оptimization of composite structure based on fracture analysis" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2019 (2019):3,
https://hdl.handle.net/21.15107/rcub_machinery_6062 .

TY  - CONF
AU  - Mohammed, Anwer
AU  - Zivic, Nenad
AU  - Balać, Martina
AU  - Grbović, Aleksandar
AU  - Tanasković, Jovan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5968
AB  - There are significant efforts around the globe to develop effective systems for energy production from
renewable sources such as wind energy. The replacement of so-called dirty technologies used for the
production of energy from fossil fuels with modern clean technologies led to the development and testing of
aerodynamic constituents of wind farms that can provide environmentally friendly and safe energy.
The objective of this paper is to present the analysis of the efficiency of vertical axis wind turbines that can be
installed on the building roofs in big cities. Primary design of the turbine construction was based on idea to
minimize the number of moving parts which could cause potential defects during the lifecycle. The rotor was
design as a composite structure that should be resistant to stresses caused by complex weather conditions
during the seasons.
Based on the results of two-dimensional numerical simulation of the vertical axis wind turbine motion, it can
be concluded that there will be enough buoyancy forces on the rotor blades to create a torque around the axis
of rotation and transform kinetic energy of the rotational movement into electrical energy.
Furthermore, comprehensive 3D simulation gives an even better picture of the streamlines and a clear path to
the design and testing of the prototype. Due to the constant induction of the buoyant force (i.e. the moment),
the continuous load on the construction will produce quieter motion of the blades, which is of great importance
for people who would live in buildings under this type of wind turbine.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract
T1  - Design and analysis of the efficiency of the vertically axial wind turbine
EP  - 35
SP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5968
ER  - 

@conference{
author = "Mohammed, Anwer and Zivic, Nenad and Balać, Martina and Grbović, Aleksandar and Tanasković, Jovan",
year = "2019",
abstract = "There are significant efforts around the globe to develop effective systems for energy production from
renewable sources such as wind energy. The replacement of so-called dirty technologies used for the
production of energy from fossil fuels with modern clean technologies led to the development and testing of
aerodynamic constituents of wind farms that can provide environmentally friendly and safe energy.
The objective of this paper is to present the analysis of the efficiency of vertical axis wind turbines that can be
installed on the building roofs in big cities. Primary design of the turbine construction was based on idea to
minimize the number of moving parts which could cause potential defects during the lifecycle. The rotor was
design as a composite structure that should be resistant to stresses caused by complex weather conditions
during the seasons.
Based on the results of two-dimensional numerical simulation of the vertical axis wind turbine motion, it can
be concluded that there will be enough buoyancy forces on the rotor blades to create a torque around the axis
of rotation and transform kinetic energy of the rotational movement into electrical energy.
Furthermore, comprehensive 3D simulation gives an even better picture of the streamlines and a clear path to
the design and testing of the prototype. Due to the constant induction of the buoyant force (i.e. the moment),
the continuous load on the construction will produce quieter motion of the blades, which is of great importance
for people who would live in buildings under this type of wind turbine.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract",
title = "Design and analysis of the efficiency of the vertically axial wind turbine",
pages = "35-35",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5968"
}

Mohammed, A., Zivic, N., Balać, M., Grbović, A.,& Tanasković, J.. (2019). Design and analysis of the efficiency of the vertically axial wind turbine. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract
Innovation Center of Faculty of Mechanical Engineering., 35-35.
https://hdl.handle.net/21.15107/rcub_machinery_5968

Mohammed A, Zivic N, Balać M, Grbović A, Tanasković J. Design and analysis of the efficiency of the vertically axial wind turbine. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract. 2019;:35-35.
https://hdl.handle.net/21.15107/rcub_machinery_5968 .

Mohammed, Anwer, Zivic, Nenad, Balać, Martina, Grbović, Aleksandar, Tanasković, Jovan, "Design and analysis of the efficiency of the vertically axial wind turbine" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract (2019):35-35,
https://hdl.handle.net/21.15107/rcub_machinery_5968 .

TY  - PAT
AU  - Tanasković, Jovan
AU  - Dragičević, Aleksandra
AU  - Radović, Nenad
AU  - Balać, Martina
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5722
AB  - Tehnički problem koji se rešava ovim pronalaskom je automatsko odbravljivanje i zabravljivanje klizne grede poluprikolice, čime se omogućava operateru-vozaču vučenog vozila da tovarnu površinu u svakom trenutku, prema potrebi, može povećati (produžiti) ili smanjiti (skratiti) daljinskom komandom.
PB  - Beograd :  Zavod za intelektualnu svojinu
T2  - Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019
T1  - Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5722
ER  - 

@misc{
author = "Tanasković, Jovan and Dragičević, Aleksandra and Radović, Nenad and Balać, Martina",
year = "2019",
abstract = "Tehnički problem koji se rešava ovim pronalaskom je automatsko odbravljivanje i zabravljivanje klizne grede poluprikolice, čime se omogućava operateru-vozaču vučenog vozila da tovarnu površinu u svakom trenutku, prema potrebi, može povećati (produžiti) ili smanjiti (skratiti) daljinskom komandom.",
publisher = "Beograd :  Zavod za intelektualnu svojinu",
journal = "Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019",
title = "Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5722"
}

Tanasković, J., Dragičević, A., Radović, N.,& Balać, M.. (2019). Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam. in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019
Beograd :  Zavod za intelektualnu svojinu..
https://hdl.handle.net/21.15107/rcub_machinery_5722

Tanasković J, Dragičević A, Radović N, Balać M. Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam. in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_5722 .

Tanasković, Jovan, Dragičević, Aleksandra, Radović, Nenad, Balać, Martina, "Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam" in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019 (2019),
https://hdl.handle.net/21.15107/rcub_machinery_5722 .

TY  - CONF
AU  - Balać, Martina
AU  - Grbović, Aleksandar
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3144
AB  - Structural analysis of pressure equipment (vessels) has always been a huge challenge for researchers. Pressure vessels are usually subjected to different loads in exploitation and small defects can lead to failure of the equipment, which may result in loss of life, health hazards and damage of property. Modern approach of stress and strain analysis of the influence of welded nozzles on pressure vessels involves numerical and experimental testing. In this research, 3D Digital Image Correlation (DIC) method for analyzing full field surface strain and stress, including camera system in combination with Aramis software, was used. After determination of critical areas with highest von Mises stresses and strain concentrations, numerical analysis of equivalent 3D model was performed in Ansys Workbench software. The aim of this paper is to present detailed parameter optimization of pressure vessel with two nozzles based on finite element analysis (FEA) of the structure. Several geometrical parameters were varied to obtain the optimum geometry of the pressure vessel, capable of withstanding the service load without plastic deformation. It is shown that carried out optimization gives the minimum weight of pressure vessel with optimized wall and nozzle thicknesses for the given load.
PB  - Springer International Publishing Ag, Cham
C3  - Experimental and Numerical Investigations in Materials Science and Engineering
T1  - Multiparameter Structural Optimization of Pressure Vessel with Two Nozzles
EP  - 158
SP  - 148
VL  - 54
DO  - 10.1007/978-3-319-99620-2_12
ER  - 

@conference{
author = "Balać, Martina and Grbović, Aleksandar",
year = "2019",
abstract = "Structural analysis of pressure equipment (vessels) has always been a huge challenge for researchers. Pressure vessels are usually subjected to different loads in exploitation and small defects can lead to failure of the equipment, which may result in loss of life, health hazards and damage of property. Modern approach of stress and strain analysis of the influence of welded nozzles on pressure vessels involves numerical and experimental testing. In this research, 3D Digital Image Correlation (DIC) method for analyzing full field surface strain and stress, including camera system in combination with Aramis software, was used. After determination of critical areas with highest von Mises stresses and strain concentrations, numerical analysis of equivalent 3D model was performed in Ansys Workbench software. The aim of this paper is to present detailed parameter optimization of pressure vessel with two nozzles based on finite element analysis (FEA) of the structure. Several geometrical parameters were varied to obtain the optimum geometry of the pressure vessel, capable of withstanding the service load without plastic deformation. It is shown that carried out optimization gives the minimum weight of pressure vessel with optimized wall and nozzle thicknesses for the given load.",
publisher = "Springer International Publishing Ag, Cham",
journal = "Experimental and Numerical Investigations in Materials Science and Engineering",
title = "Multiparameter Structural Optimization of Pressure Vessel with Two Nozzles",
pages = "158-148",
volume = "54",
doi = "10.1007/978-3-319-99620-2_12"
}

Balać, M.,& Grbović, A.. (2019). Multiparameter Structural Optimization of Pressure Vessel with Two Nozzles. in Experimental and Numerical Investigations in Materials Science and Engineering
Springer International Publishing Ag, Cham., 54, 148-158.
https://doi.org/10.1007/978-3-319-99620-2_12

Balać M, Grbović A. Multiparameter Structural Optimization of Pressure Vessel with Two Nozzles. in Experimental and Numerical Investigations in Materials Science and Engineering. 2019;54:148-158.
doi:10.1007/978-3-319-99620-2_12 .

Balać, Martina, Grbović, Aleksandar, "Multiparameter Structural Optimization of Pressure Vessel with Two Nozzles" in Experimental and Numerical Investigations in Materials Science and Engineering, 54 (2019):148-158,
https://doi.org/10.1007/978-3-319-99620-2_12 . .

TY  - GEN
AU  - Balać, Martina
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6058
AB  - The main aim of many researchers is to solve the problem of shape optimization of the pressure vessels in order to save materials and energy during manufacturing, but preserve reliability during exploitation. Structural optimization of several parameters that have main impact on stress, strain and deformation state of the pressure vessels is presented in this research. Modern approach of stress and strain analysis on pressure vessels involves numerical and experimental testing. Experimental 3D Digital Image Correlation (DIC) method for analyzing full field of surface strain and stress including camera system in combination with Aramis software was used. After determination of areas with highest von Mises stresses and strain concentrations, numerical analysis of equivalent 3D model was performed in Ansys Workbench software. Results in critical areas were compared and they showed good agreement. Then, several parameters were chosen for optimization in order to reduce stresses and mass weight of pressure vessel. Response Surface Optimization (RSO) method was used to optimize geometry of the pressure vessel parts (shell, head and nozzles). It is shown that carried out optimization gives the minimum weight of pressure vessel with optimized wall and nozzle thicknesses for the given load.
PB  - Innovation Center of Faculty of Mechanical Engineering Belgrade
T2  - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2018
T1  - structural optimization of pressure vessels using FEA
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6058
ER  - 

@misc{
author = "Balać, Martina",
year = "2018",
abstract = "The main aim of many researchers is to solve the problem of shape optimization of the pressure vessels in order to save materials and energy during manufacturing, but preserve reliability during exploitation. Structural optimization of several parameters that have main impact on stress, strain and deformation state of the pressure vessels is presented in this research. Modern approach of stress and strain analysis on pressure vessels involves numerical and experimental testing. Experimental 3D Digital Image Correlation (DIC) method for analyzing full field of surface strain and stress including camera system in combination with Aramis software was used. After determination of areas with highest von Mises stresses and strain concentrations, numerical analysis of equivalent 3D model was performed in Ansys Workbench software. Results in critical areas were compared and they showed good agreement. Then, several parameters were chosen for optimization in order to reduce stresses and mass weight of pressure vessel. Response Surface Optimization (RSO) method was used to optimize geometry of the pressure vessel parts (shell, head and nozzles). It is shown that carried out optimization gives the minimum weight of pressure vessel with optimized wall and nozzle thicknesses for the given load.",
publisher = "Innovation Center of Faculty of Mechanical Engineering Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2018",
title = "structural optimization of pressure vessels using FEA",
pages = "32",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6058"
}

Balać, M.. (2018). structural optimization of pressure vessels using FEA. in International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2018
Innovation Center of Faculty of Mechanical Engineering Belgrade., 32.
https://hdl.handle.net/21.15107/rcub_machinery_6058

Balać M. structural optimization of pressure vessels using FEA. in International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2018. 2018;:32.
https://hdl.handle.net/21.15107/rcub_machinery_6058 .

Balać, Martina, "structural optimization of pressure vessels using FEA" in International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2018 (2018):32,
https://hdl.handle.net/21.15107/rcub_machinery_6058 .

TY  - CONF
AU  - Tanasković, Jovan
AU  - Balać, Martina
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5971
AB  - Subject of this paper is numerical analysis of the steel structure of biomass reservoir under hydrostatic pressure as well as additional loads. Reservoir was made from steel grade S235 and presents disassembly construction which contains eight walls of height of 5.5 meters placed on the floor in diameter of 10 meters. The floor is supported on eight legs along the scope and on the four center legs. Static strength analysis was performed by finite element method using 3D model obtained by the producer. Three load cases were analyzed: a) hydrostatic pressure obtained by water to the height of 5 meters, b) hydrostatic pressure and snow force on the upper flange of 5.9 kN and c) hydrostatic pressure and biogas pressure on under flange of 8 mbar. Numerical results were showed that the structure is not correctly defined. Maximal values of stresses are much higher than allowed for the steel S235, especially in the floor construction and on the joins between the walls and the floor. Reconstruction of the reservoir was suggested. The floor is reinforced by the under frame made from tubes of rectangle cross section and with additional supports in the central zone. These modifications were gave the lower values of the stresses but for use of full capacity of reservoir is necessary to increase thickness of steel cover of the floor and the walls on the height of 1 meter from the floor. Without any changes of the steel construction, producer decided to use reservoir with capacity of 1/5 of full (1m height of water) and moved prototype to farm where assembly of them started.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract
T1  - Static strength analyses of the steel structure of biomass reservoir under hydrostatic pressure
EP  - 6
SP  - 6
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5971
ER  - 

@conference{
author = "Tanasković, Jovan and Balać, Martina",
year = "2018",
abstract = "Subject of this paper is numerical analysis of the steel structure of biomass reservoir under hydrostatic pressure as well as additional loads. Reservoir was made from steel grade S235 and presents disassembly construction which contains eight walls of height of 5.5 meters placed on the floor in diameter of 10 meters. The floor is supported on eight legs along the scope and on the four center legs. Static strength analysis was performed by finite element method using 3D model obtained by the producer. Three load cases were analyzed: a) hydrostatic pressure obtained by water to the height of 5 meters, b) hydrostatic pressure and snow force on the upper flange of 5.9 kN and c) hydrostatic pressure and biogas pressure on under flange of 8 mbar. Numerical results were showed that the structure is not correctly defined. Maximal values of stresses are much higher than allowed for the steel S235, especially in the floor construction and on the joins between the walls and the floor. Reconstruction of the reservoir was suggested. The floor is reinforced by the under frame made from tubes of rectangle cross section and with additional supports in the central zone. These modifications were gave the lower values of the stresses but for use of full capacity of reservoir is necessary to increase thickness of steel cover of the floor and the walls on the height of 1 meter from the floor. Without any changes of the steel construction, producer decided to use reservoir with capacity of 1/5 of full (1m height of water) and moved prototype to farm where assembly of them started.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract",
title = "Static strength analyses of the steel structure of biomass reservoir under hydrostatic pressure",
pages = "6-6",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5971"
}

Tanasković, J.,& Balać, M.. (2018). Static strength analyses of the steel structure of biomass reservoir under hydrostatic pressure. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract
Innovation Center of Faculty of Mechanical Engineering., 6-6.
https://hdl.handle.net/21.15107/rcub_machinery_5971

Tanasković J, Balać M. Static strength analyses of the steel structure of biomass reservoir under hydrostatic pressure. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract. 2018;:6-6.
https://hdl.handle.net/21.15107/rcub_machinery_5971 .

Tanasković, Jovan, Balać, Martina, "Static strength analyses of the steel structure of biomass reservoir under hydrostatic pressure" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract (2018):6-6,
https://hdl.handle.net/21.15107/rcub_machinery_5971 .

TY  - JOUR
AU  - Balać, Martina
AU  - Grbović, Aleksandar
AU  - Petrović, Aleksandar
AU  - Popović, Vladimir
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2919
AB  - To ensure reliability of pressure vessels during service it is necessary to (1) know properties of materials used in their design and (2) evaluate vessels' behaviour under different working conditions with satisfying accuracy. Due to various technical and/or technological requirements, nozzles are usually welded on vessel's shell producing geometrical discontinuities that reduce the safety factor. To evaluate their influence, vessels with two different nozzles were experimentally studied and critical areas for crack initiation have been identified by 3D Digital Image Correlation (DIC) method. After that, the numerical analysis of equivalent 3D finite element model was performed and obtained results were compared with experimental values. In the most critical area, next to the one of the nozzles, crack was initiated and then growth of the damage was simulated using extended finite element method (XFEM). In this paper evaluation of stress intensity factors (SIFs) along crack path is presented, as well as the most probable direction of the crack propagation on the shell. Based on SIFs values, critical length of the crack and number of pressure cycles to the final failure were estimated.
PB  - Polish Maintenance Soc, Lublin
T2  - Eksploatacja I Niezawodnosc-Maintenance and Reliability
T1  - Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface
EP  - 386
IS  - 3
SP  - 378
VL  - 20
DO  - 10.17531/ein.2018.3.5
ER  - 

@article{
author = "Balać, Martina and Grbović, Aleksandar and Petrović, Aleksandar and Popović, Vladimir",
year = "2018",
abstract = "To ensure reliability of pressure vessels during service it is necessary to (1) know properties of materials used in their design and (2) evaluate vessels' behaviour under different working conditions with satisfying accuracy. Due to various technical and/or technological requirements, nozzles are usually welded on vessel's shell producing geometrical discontinuities that reduce the safety factor. To evaluate their influence, vessels with two different nozzles were experimentally studied and critical areas for crack initiation have been identified by 3D Digital Image Correlation (DIC) method. After that, the numerical analysis of equivalent 3D finite element model was performed and obtained results were compared with experimental values. In the most critical area, next to the one of the nozzles, crack was initiated and then growth of the damage was simulated using extended finite element method (XFEM). In this paper evaluation of stress intensity factors (SIFs) along crack path is presented, as well as the most probable direction of the crack propagation on the shell. Based on SIFs values, critical length of the crack and number of pressure cycles to the final failure were estimated.",
publisher = "Polish Maintenance Soc, Lublin",
journal = "Eksploatacja I Niezawodnosc-Maintenance and Reliability",
title = "Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface",
pages = "386-378",
number = "3",
volume = "20",
doi = "10.17531/ein.2018.3.5"
}

Balać, M., Grbović, A., Petrović, A.,& Popović, V.. (2018). Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface. in Eksploatacja I Niezawodnosc-Maintenance and Reliability
Polish Maintenance Soc, Lublin., 20(3), 378-386.
https://doi.org/10.17531/ein.2018.3.5

Balać M, Grbović A, Petrović A, Popović V. Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface. in Eksploatacja I Niezawodnosc-Maintenance and Reliability. 2018;20(3):378-386.
doi:10.17531/ein.2018.3.5 .

Balać, Martina, Grbović, Aleksandar, Petrović, Aleksandar, Popović, Vladimir, "Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface" in Eksploatacja I Niezawodnosc-Maintenance and Reliability, 20, no. 3 (2018):378-386,
https://doi.org/10.17531/ein.2018.3.5 . .

TY  - JOUR
AU  - Radojević, Miloš
AU  - Balać, Martina
AU  - Jovanović, Vladimir
AU  - Stojiljković, Dragoslava
AU  - Manić, Nebojša
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2846
AB  - In the Republic of Serbia there are significant quantities of coffee and tire wastes that can be utilized as Solid Recovered Fuel (SRF) and used as an additional fuel for co-combustion with coal and biomass in energy production and cement industry sectors. Differences between SRF and base fuel are a cause of numerous problems in design of burners. The objective of this study was to determine the kinetic parameters for the thermochemical conversion of selected SRF using Simultaneous Thermal Analysis (STA). Samples of coffee and tire waste were used for the experimental tests. Thermal analysis was carried out in nitrogen atmosphere at three different heating rates 10, 15 and 20 K/min for each sample, while it was heated from room temperature up to 900 degrees C. Two sample sizes x  lt  0.25 mm and 0.25  lt  x  lt  0.5 mm of each SRF were used in experiments, in order to obtain reliable Thermal Gravimetric Analysis (TGA) data for estimation of kinetic parameters for SRF pyrolysis. Experimental results were used for determination of pre-exponential factor and activation energy according to methods presented in the literature. Presented research provides valuable data of coffee and tire waste that can be used for the burners design.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Thermogravimetric kinetic study of solid recovered fuels pyrolysis
EP  - 106
IS  - 2
SP  - 99
VL  - 72
DO  - 10.2298/HEMIND171009002R
ER  - 

@article{
author = "Radojević, Miloš and Balać, Martina and Jovanović, Vladimir and Stojiljković, Dragoslava and Manić, Nebojša",
year = "2018",
abstract = "In the Republic of Serbia there are significant quantities of coffee and tire wastes that can be utilized as Solid Recovered Fuel (SRF) and used as an additional fuel for co-combustion with coal and biomass in energy production and cement industry sectors. Differences between SRF and base fuel are a cause of numerous problems in design of burners. The objective of this study was to determine the kinetic parameters for the thermochemical conversion of selected SRF using Simultaneous Thermal Analysis (STA). Samples of coffee and tire waste were used for the experimental tests. Thermal analysis was carried out in nitrogen atmosphere at three different heating rates 10, 15 and 20 K/min for each sample, while it was heated from room temperature up to 900 degrees C. Two sample sizes x  lt  0.25 mm and 0.25  lt  x  lt  0.5 mm of each SRF were used in experiments, in order to obtain reliable Thermal Gravimetric Analysis (TGA) data for estimation of kinetic parameters for SRF pyrolysis. Experimental results were used for determination of pre-exponential factor and activation energy according to methods presented in the literature. Presented research provides valuable data of coffee and tire waste that can be used for the burners design.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Thermogravimetric kinetic study of solid recovered fuels pyrolysis",
pages = "106-99",
number = "2",
volume = "72",
doi = "10.2298/HEMIND171009002R"
}

Radojević, M., Balać, M., Jovanović, V., Stojiljković, D.,& Manić, N.. (2018). Thermogravimetric kinetic study of solid recovered fuels pyrolysis. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 72(2), 99-106.
https://doi.org/10.2298/HEMIND171009002R

Radojević M, Balać M, Jovanović V, Stojiljković D, Manić N. Thermogravimetric kinetic study of solid recovered fuels pyrolysis. in Hemijska Industrija. 2018;72(2):99-106.
doi:10.2298/HEMIND171009002R .

Radojević, Miloš, Balać, Martina, Jovanović, Vladimir, Stojiljković, Dragoslava, Manić, Nebojša, "Thermogravimetric kinetic study of solid recovered fuels pyrolysis" in Hemijska Industrija, 72, no. 2 (2018):99-106,
https://doi.org/10.2298/HEMIND171009002R . .

TY  - JOUR
AU  - Maneski, Taško
AU  - Bajić, Darko
AU  - Momčilović, Nikola
AU  - Milošević-Mitić, Vesna
AU  - Balać, Martina
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2795
AB  - Složenost geometrije posuda pod pritiskom obično predstavlja uzrok pojave koncentracije napona i deformacija. Savremeni pristup analize stanja napona i deformacija uključuje numerička i eksperimentalna ispitivanja. Svako eksperimentalno testiranje na realnoj konstrukciji može ugroziti samu konstrukciju. Stoga, pravljenje modela neke konstrukcije ima velike prednosti. Umanjeni model račve A6 trećeg cevovoda na HE Perućica, Nikšić je izrađen kako bi bio podvrgnut detaljnom eksperimentalnom testiranju. Cilj je bio da se odredi vrednost unutrašnjeg pritiska koji dovodi do plastične deformacije na modelu račve i da se ovi rezultati koriste za određivanje pritiska koji će stvarnu konstrukciju dovesti do plastičnog deformisanja bez ikakvih merenja na samoj konstrukciji. Eksperimentalna merenja su sprovedena metodom mernih traka. Merne trake su pozicionirane na kritične zone. Numerički model i rezultati dobijeni metodom konačnih elemenata (FEM) potvrđeni su eksperimentalnim rezultatima (u oblasti elastičnosti). Nakon verifikacije u elastičnoj oblasti, povećanjem pritiska, eksperimentalno određena je kritična vrednost unutrašnjeg pritiska koji je izazvao plastičnu deformaciju modela račve. Na osnovu ponašanja modela račve i nakon određivanja odnosa između modela i stvarne konstrukcije, procenjuje se maksimalna izračunata vrednost unutrašnjeg pritiska na koju se realna konstrukcija može izložiti. Pored toga, slabe tačke na konstrukciji su potvrđene dobijanjem istih rezultata kroz eksperiment i proračun, što daje dobre smernice za praćenje ove konstrukcije tokom eksploatacije, s obzirom na to da je ovakvom analizom moguće smanjiti broj mernih mesta za praćenje (u smislu da se kontrolišu tačno ona merna mesta koja su se pokazala kao najkritičnija).
AB  - Complexity of pressure vessels geometry usually causes stress and strain concentrations. Modern approach of stress and strain analysis involves numerical and experimental testing. Every experimental testing on the construction could endanger construction itself. Therefore, making a model of the construction has great benefits. Sub-sized model of the pipe branch of A6 third pipeline at Hydropower Plant Perućica, Nikšić was made in order to be subjected to a detailed experimental testing. The aim was to determine internal pressure value causing pipe branch model to plastically deform, and, to use these results for determining pressure causing real structure to plastically deform, without any measurements on the structure itself. Experimental measurements were carried out using strain gauge method. Strain gauges are positioned in critical zones. Numerical pipe branch model and results obtained by using finite element method (FEM) was verified with experimental results (in elasticity area). After verification in elastic area, experimentally by increasing pressure value, critical internal pressure causing plastic deformation of pipe branch model was determined. Based on the pipe branch model behaviour, and after determination of relation between the model and the real structure, maximum calculated internal pressure value to which the structure may be subjected in exploitation is assessed. Besides, weak spots on the structure were verified by obtaining the same results through experiment and calculation, which gives good guidelines for monitoring of this structure during usage, since it is possible, by using this analysis, to decrease the number of measurement locations for monitoring (in order to control exactly those measurement locations, which proved to be the most endangered).
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Određivanje vrednosti unutrašnjeg pritiska koji će dovesti do plastične deformacije na modelu račve
T1  - Determination of internal pressure value causing pipe branch model to plastically deform
EP  - 223
IS  - 2
SP  - 218
VL  - 46
DO  - 10.5937/fmet1802218M
ER  - 

@article{
author = "Maneski, Taško and Bajić, Darko and Momčilović, Nikola and Milošević-Mitić, Vesna and Balać, Martina",
year = "2018",
abstract = "Složenost geometrije posuda pod pritiskom obično predstavlja uzrok pojave koncentracije napona i deformacija. Savremeni pristup analize stanja napona i deformacija uključuje numerička i eksperimentalna ispitivanja. Svako eksperimentalno testiranje na realnoj konstrukciji može ugroziti samu konstrukciju. Stoga, pravljenje modela neke konstrukcije ima velike prednosti. Umanjeni model račve A6 trećeg cevovoda na HE Perućica, Nikšić je izrađen kako bi bio podvrgnut detaljnom eksperimentalnom testiranju. Cilj je bio da se odredi vrednost unutrašnjeg pritiska koji dovodi do plastične deformacije na modelu račve i da se ovi rezultati koriste za određivanje pritiska koji će stvarnu konstrukciju dovesti do plastičnog deformisanja bez ikakvih merenja na samoj konstrukciji. Eksperimentalna merenja su sprovedena metodom mernih traka. Merne trake su pozicionirane na kritične zone. Numerički model i rezultati dobijeni metodom konačnih elemenata (FEM) potvrđeni su eksperimentalnim rezultatima (u oblasti elastičnosti). Nakon verifikacije u elastičnoj oblasti, povećanjem pritiska, eksperimentalno određena je kritična vrednost unutrašnjeg pritiska koji je izazvao plastičnu deformaciju modela račve. Na osnovu ponašanja modela račve i nakon određivanja odnosa između modela i stvarne konstrukcije, procenjuje se maksimalna izračunata vrednost unutrašnjeg pritiska na koju se realna konstrukcija može izložiti. Pored toga, slabe tačke na konstrukciji su potvrđene dobijanjem istih rezultata kroz eksperiment i proračun, što daje dobre smernice za praćenje ove konstrukcije tokom eksploatacije, s obzirom na to da je ovakvom analizom moguće smanjiti broj mernih mesta za praćenje (u smislu da se kontrolišu tačno ona merna mesta koja su se pokazala kao najkritičnija)., Complexity of pressure vessels geometry usually causes stress and strain concentrations. Modern approach of stress and strain analysis involves numerical and experimental testing. Every experimental testing on the construction could endanger construction itself. Therefore, making a model of the construction has great benefits. Sub-sized model of the pipe branch of A6 third pipeline at Hydropower Plant Perućica, Nikšić was made in order to be subjected to a detailed experimental testing. The aim was to determine internal pressure value causing pipe branch model to plastically deform, and, to use these results for determining pressure causing real structure to plastically deform, without any measurements on the structure itself. Experimental measurements were carried out using strain gauge method. Strain gauges are positioned in critical zones. Numerical pipe branch model and results obtained by using finite element method (FEM) was verified with experimental results (in elasticity area). After verification in elastic area, experimentally by increasing pressure value, critical internal pressure causing plastic deformation of pipe branch model was determined. Based on the pipe branch model behaviour, and after determination of relation between the model and the real structure, maximum calculated internal pressure value to which the structure may be subjected in exploitation is assessed. Besides, weak spots on the structure were verified by obtaining the same results through experiment and calculation, which gives good guidelines for monitoring of this structure during usage, since it is possible, by using this analysis, to decrease the number of measurement locations for monitoring (in order to control exactly those measurement locations, which proved to be the most endangered).",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Određivanje vrednosti unutrašnjeg pritiska koji će dovesti do plastične deformacije na modelu račve, Determination of internal pressure value causing pipe branch model to plastically deform",
pages = "223-218",
number = "2",
volume = "46",
doi = "10.5937/fmet1802218M"
}

Maneski, T., Bajić, D., Momčilović, N., Milošević-Mitić, V.,& Balać, M.. (2018). Određivanje vrednosti unutrašnjeg pritiska koji će dovesti do plastične deformacije na modelu račve. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 46(2), 218-223.
https://doi.org/10.5937/fmet1802218M

Maneski T, Bajić D, Momčilović N, Milošević-Mitić V, Balać M. Određivanje vrednosti unutrašnjeg pritiska koji će dovesti do plastične deformacije na modelu račve. in FME Transactions. 2018;46(2):218-223.
doi:10.5937/fmet1802218M .

Maneski, Taško, Bajić, Darko, Momčilović, Nikola, Milošević-Mitić, Vesna, Balać, Martina, "Određivanje vrednosti unutrašnjeg pritiska koji će dovesti do plastične deformacije na modelu račve" in FME Transactions, 46, no. 2 (2018):218-223,
https://doi.org/10.5937/fmet1802218M . .

TY  - JOUR
AU  - Bajić, Darko
AU  - Momčilović, Nikola
AU  - Maneski, Taško
AU  - Balać, Martina
AU  - Kozak, Dražan
AU  - Culafić, Stefan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2521
AB  - The subject of this paper is testing of complex geometrical structures, i.e. stress analysis of a pipe branch model of A6 third pipeline at Hydropower Plant Perucica, Niksic. Analysis of pipe branch model stress distribution was carried out by using finite element method and experimental methods. Finite element method defined 3D pipe branch model. Numerical calculation defined critical locations on model, i.e. locations with the greatest stress concentration. Strain gauges were placed on identified critical locations. Measured stress values confirmed values obtained by using numerical calculation. Experimental measurements were also taken by using new digital image correlation (DIC) method. DIC method is an optical non-contact method that can provide full 3D stress field and enables better understanding of complex structures such as pipe branches. The aim of this paper was to determine stress concentration factor for the pipe branch model by using numerical and experimental analysis.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik
T1  - Numerical and experimental determination of stress concentration factor for a pipe branch model
EP  - 692
IS  - 3
SP  - 687
VL  - 24
DO  - 10.17559/TV-20151126222916
ER  - 

@article{
author = "Bajić, Darko and Momčilović, Nikola and Maneski, Taško and Balać, Martina and Kozak, Dražan and Culafić, Stefan",
year = "2017",
abstract = "The subject of this paper is testing of complex geometrical structures, i.e. stress analysis of a pipe branch model of A6 third pipeline at Hydropower Plant Perucica, Niksic. Analysis of pipe branch model stress distribution was carried out by using finite element method and experimental methods. Finite element method defined 3D pipe branch model. Numerical calculation defined critical locations on model, i.e. locations with the greatest stress concentration. Strain gauges were placed on identified critical locations. Measured stress values confirmed values obtained by using numerical calculation. Experimental measurements were also taken by using new digital image correlation (DIC) method. DIC method is an optical non-contact method that can provide full 3D stress field and enables better understanding of complex structures such as pipe branches. The aim of this paper was to determine stress concentration factor for the pipe branch model by using numerical and experimental analysis.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik",
title = "Numerical and experimental determination of stress concentration factor for a pipe branch model",
pages = "692-687",
number = "3",
volume = "24",
doi = "10.17559/TV-20151126222916"
}

Bajić, D., Momčilović, N., Maneski, T., Balać, M., Kozak, D.,& Culafić, S.. (2017). Numerical and experimental determination of stress concentration factor for a pipe branch model. in Tehnički vjesnik
Univ Osijek, Tech Fac, Slavonski Brod., 24(3), 687-692.
https://doi.org/10.17559/TV-20151126222916

Bajić D, Momčilović N, Maneski T, Balać M, Kozak D, Culafić S. Numerical and experimental determination of stress concentration factor for a pipe branch model. in Tehnički vjesnik. 2017;24(3):687-692.
doi:10.17559/TV-20151126222916 .

Bajić, Darko, Momčilović, Nikola, Maneski, Taško, Balać, Martina, Kozak, Dražan, Culafić, Stefan, "Numerical and experimental determination of stress concentration factor for a pipe branch model" in Tehnički vjesnik, 24, no. 3 (2017):687-692,
https://doi.org/10.17559/TV-20151126222916 . .

TY  - CONF
AU  - Maneski, Taško
AU  - Bajić, Darko
AU  - Petrović, Ana
AU  - Momčilović, Nikola
AU  - Milošević-Mitić, Vesna
AU  - Balać, Martina
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6007
AB  - Complexity of pressure vessels geometry usually causes stress and strain concentrations. Modern approach of stress and strain analysis involves numerical and experimental testing. Every experimental testing on the construction could endanger construction itself. Therefore, making a model of the construction has great benefits. Sub-sized model of the pipe branch of A6 third pipeline at Hydropower Plant Perućica, Nikšić was made in order to be subjected to a detailed experimental testing. The aim was to determine internal pressure value causing pipe branch model to plastically deform, and, to use this results for determining pressure causing real structure to plastically deform, without any measurements on the structure itself. Experimental measurements were carried out using strain gauge method. Strain gauges are positioned in critical zones.
Numerical pipe branch model and results obtained by using finite element method (FEM) was verified with experimental results (in elasticity area). After verification in elastic area, experimentally by increasing pressure value, critical internal pressure causing plastic deformation of pipe branch model was determined. Based on the pipe branch model behaviour, and after determination of relation between the model and the real structure, maximum calculated internal pressure value to which the structure may be subjected in exploitation is assessed. Besides, weak spots on the structure were verified by obtaining same results through experiment and calculation, which gives good guidelines for monitoring of this structure during usage, since it is possible, by using this analysis, to decrease number of measurement locations for monitoring (in order to control exactly those measurement locations which proved to be the most endangered).
C3  - International Conference of Experimental and Numerical Investigations and New Technologies
T1  - Determination of internal pressure value causing pipe branch model to plastically deform
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6007
ER  - 

@conference{
author = "Maneski, Taško and Bajić, Darko and Petrović, Ana and Momčilović, Nikola and Milošević-Mitić, Vesna and Balać, Martina",
year = "2017",
abstract = "Complexity of pressure vessels geometry usually causes stress and strain concentrations. Modern approach of stress and strain analysis involves numerical and experimental testing. Every experimental testing on the construction could endanger construction itself. Therefore, making a model of the construction has great benefits. Sub-sized model of the pipe branch of A6 third pipeline at Hydropower Plant Perućica, Nikšić was made in order to be subjected to a detailed experimental testing. The aim was to determine internal pressure value causing pipe branch model to plastically deform, and, to use this results for determining pressure causing real structure to plastically deform, without any measurements on the structure itself. Experimental measurements were carried out using strain gauge method. Strain gauges are positioned in critical zones.
Numerical pipe branch model and results obtained by using finite element method (FEM) was verified with experimental results (in elasticity area). After verification in elastic area, experimentally by increasing pressure value, critical internal pressure causing plastic deformation of pipe branch model was determined. Based on the pipe branch model behaviour, and after determination of relation between the model and the real structure, maximum calculated internal pressure value to which the structure may be subjected in exploitation is assessed. Besides, weak spots on the structure were verified by obtaining same results through experiment and calculation, which gives good guidelines for monitoring of this structure during usage, since it is possible, by using this analysis, to decrease number of measurement locations for monitoring (in order to control exactly those measurement locations which proved to be the most endangered).",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies",
title = "Determination of internal pressure value causing pipe branch model to plastically deform",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6007"
}

Maneski, T., Bajić, D., Petrović, A., Momčilović, N., Milošević-Mitić, V.,& Balać, M.. (2017). Determination of internal pressure value causing pipe branch model to plastically deform. in International Conference of Experimental and Numerical Investigations and New Technologies.
https://hdl.handle.net/21.15107/rcub_machinery_6007

Maneski T, Bajić D, Petrović A, Momčilović N, Milošević-Mitić V, Balać M. Determination of internal pressure value causing pipe branch model to plastically deform. in International Conference of Experimental and Numerical Investigations and New Technologies. 2017;.
https://hdl.handle.net/21.15107/rcub_machinery_6007 .

Maneski, Taško, Bajić, Darko, Petrović, Ana, Momčilović, Nikola, Milošević-Mitić, Vesna, Balać, Martina, "Determination of internal pressure value causing pipe branch model to plastically deform" in International Conference of Experimental and Numerical Investigations and New Technologies (2017),
https://hdl.handle.net/21.15107/rcub_machinery_6007 .

TY  - BOOK
AU  - Mitrović, Nenad
AU  - Balać, Martina
AU  - Petrović, Aleksandar
AU  - Milošević, Miloš
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6146
PB  - Univerzitet u Beogradu Mašinski fakultet
T2  - Univerzitet u Beogradu Mašinski fakultet
T1  - Primena metode korelacije digitalnih slika (digital image correlation – dic) opremu pod pritiskom
EP  - 347
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6146
ER  - 

@book{
author = "Mitrović, Nenad and Balać, Martina and Petrović, Aleksandar and Milošević, Miloš",
year = "2017",
publisher = "Univerzitet u Beogradu Mašinski fakultet",
journal = "Univerzitet u Beogradu Mašinski fakultet",
title = "Primena metode korelacije digitalnih slika (digital image correlation – dic) opremu pod pritiskom",
pages = "347-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6146"
}

Mitrović, N., Balać, M., Petrović, A.,& Milošević, M.. (2017). Primena metode korelacije digitalnih slika (digital image correlation – dic) opremu pod pritiskom. in Univerzitet u Beogradu Mašinski fakultet
Univerzitet u Beogradu Mašinski fakultet., 1-347.
https://hdl.handle.net/21.15107/rcub_machinery_6146

Mitrović N, Balać M, Petrović A, Milošević M. Primena metode korelacije digitalnih slika (digital image correlation – dic) opremu pod pritiskom. in Univerzitet u Beogradu Mašinski fakultet. 2017;:1-347.
https://hdl.handle.net/21.15107/rcub_machinery_6146 .

Mitrović, Nenad, Balać, Martina, Petrović, Aleksandar, Milošević, Miloš, "Primena metode korelacije digitalnih slika (digital image correlation – dic) opremu pod pritiskom" in Univerzitet u Beogradu Mašinski fakultet (2017):1-347,
https://hdl.handle.net/21.15107/rcub_machinery_6146 .

TY  - CONF
AU  - Jovičić, Radomir
AU  - Balać, Martina
AU  - Markez, Jernej
AU  - Pavlović, Danijel
AU  - Jovičić, Katarina
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6059
AB  - The cooling time in the temperature range of 800 - 500° C (t8/5) has a major impact on the structures that are formed in the heat affected zone of steel welded joints. Data on the optimum cooling time t8/5 for a particular steels can be found in the literature. Besides the shape of welded joint, the thickness and physical characteristics of the welded steel, welding process and parameters, such as amperage, voltage, welding speed and the preheating temperature also have the impact on the size of the cooling time t8 / 5. During the calculation of the actual value of the cooling time t8/5, which is obtained during the welding of the particular joint, as a rule, the assumption is that the amperage, voltage and welding speed on each section of the joint are equal to the average for the whole joint and that the temperature of the edges of the groove along the entire length are equal to the preheating temperature or inter pass temperature. Measuring of amperage and voltage during welding of a multi-pass butt - welded joint at the high strength steel, using the MIG process are presented in this paper. Results of the measurement showed that the
values of the amperage may differ significantly in certain sections of the weld, the average amperage in one part of the weld may be significantly different from the average value of the amperage in the second part of the same weld, and that both may be different from the average value of amperage for the entire weld. The influence of the changes in welding amperage on the amount of heat input and the size of cooling time t8/5 was analysed using numerical methods. It was concluded that, at certain sections of some of the weld, cooling time t8/5 goes beyond the given values, although the average values of the cooling time t8 / 5 for these welds are within the given values.
PB  - Innovation Center of Faculty of Mechanical Engineering, Belgrade
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2017
T1  - Changes of parameters during welding of certain weld and their impact on cooling time in temperature range of 800 - 500° c
SP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6059
ER  - 

@conference{
author = "Jovičić, Radomir and Balać, Martina and Markez, Jernej and Pavlović, Danijel and Jovičić, Katarina",
year = "2017",
abstract = "The cooling time in the temperature range of 800 - 500° C (t8/5) has a major impact on the structures that are formed in the heat affected zone of steel welded joints. Data on the optimum cooling time t8/5 for a particular steels can be found in the literature. Besides the shape of welded joint, the thickness and physical characteristics of the welded steel, welding process and parameters, such as amperage, voltage, welding speed and the preheating temperature also have the impact on the size of the cooling time t8 / 5. During the calculation of the actual value of the cooling time t8/5, which is obtained during the welding of the particular joint, as a rule, the assumption is that the amperage, voltage and welding speed on each section of the joint are equal to the average for the whole joint and that the temperature of the edges of the groove along the entire length are equal to the preheating temperature or inter pass temperature. Measuring of amperage and voltage during welding of a multi-pass butt - welded joint at the high strength steel, using the MIG process are presented in this paper. Results of the measurement showed that the
values of the amperage may differ significantly in certain sections of the weld, the average amperage in one part of the weld may be significantly different from the average value of the amperage in the second part of the same weld, and that both may be different from the average value of amperage for the entire weld. The influence of the changes in welding amperage on the amount of heat input and the size of cooling time t8/5 was analysed using numerical methods. It was concluded that, at certain sections of some of the weld, cooling time t8/5 goes beyond the given values, although the average values of the cooling time t8 / 5 for these welds are within the given values.",
publisher = "Innovation Center of Faculty of Mechanical Engineering, Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2017",
title = "Changes of parameters during welding of certain weld and their impact on cooling time in temperature range of 800 - 500° c",
pages = "9",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6059"
}

Jovičić, R., Balać, M., Markez, J., Pavlović, D.,& Jovičić, K.. (2017). Changes of parameters during welding of certain weld and their impact on cooling time in temperature range of 800 - 500° c. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2017
Innovation Center of Faculty of Mechanical Engineering, Belgrade., 9.
https://hdl.handle.net/21.15107/rcub_machinery_6059

Jovičić R, Balać M, Markez J, Pavlović D, Jovičić K. Changes of parameters during welding of certain weld and their impact on cooling time in temperature range of 800 - 500° c. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2017. 2017;:9.
https://hdl.handle.net/21.15107/rcub_machinery_6059 .

Jovičić, Radomir, Balać, Martina, Markez, Jernej, Pavlović, Danijel, Jovičić, Katarina, "Changes of parameters during welding of certain weld and their impact on cooling time in temperature range of 800 - 500° c" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2017 (2017):9,
https://hdl.handle.net/21.15107/rcub_machinery_6059 .

TY  - CONF
AU  - Balać, Martina
AU  - Grbović, Aleksandar
AU  - Mitrović, Nenad
AU  - Maneski, Taško
AU  - Milošević, Miloš
AU  - Popović, Predrag
AU  - Petrović, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6061
AB  - To evaluate the safety of welded structures, such as pressure vessels, it is necessary to know the material properties of which vessels are made and their behavior under different working conditions. Due to various requirements, nozzles are often welded on vessel’s shell. Stress and strain analysis of the influence of two nozzles closely welded on the pressure vessel cylindrical shell, subjected to internal pressure, is presented in this paper. For analysing full field of surface strain, 3D Digital Image Correlation (DIC) method was applied. DICM with camera system in combination with Aramis software is a non-contact and material independent measuring system providing high resolution, and highly accurate information about a component's 3D shape, strain and deformation. After determination of critical areas (strain concentration areas) by experimental method, the numerical analysis of the equivalent 3D model was performed. 3D model vessel which includes material nonlinear properties of vessel was obtained by finite element analysis. Maximal stress and strain values were determined and results were comparable with experimental results. The aim of this study is to show behaviour of cylindrical pressure vessel with two nozzles subjected to internal pressure, using both 3D DIC method and numerical method. Maximum values of stress and strains,
as well as their positions are shown in the paper. Differences between these two methods in the area of the highest strain values were from 2.99% to 17.8%.
PB  - Innovation Center of Faculty of Mechanical Engineering, Belgrade
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2017
T1  - Numerical modelling and experimental validation of elastic - plastic behaviour of pressure vessel with nozzles
SP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6061
ER  - 

@conference{
author = "Balać, Martina and Grbović, Aleksandar and Mitrović, Nenad and Maneski, Taško and Milošević, Miloš and Popović, Predrag and Petrović, Aleksandar",
year = "2017",
abstract = "To evaluate the safety of welded structures, such as pressure vessels, it is necessary to know the material properties of which vessels are made and their behavior under different working conditions. Due to various requirements, nozzles are often welded on vessel’s shell. Stress and strain analysis of the influence of two nozzles closely welded on the pressure vessel cylindrical shell, subjected to internal pressure, is presented in this paper. For analysing full field of surface strain, 3D Digital Image Correlation (DIC) method was applied. DICM with camera system in combination with Aramis software is a non-contact and material independent measuring system providing high resolution, and highly accurate information about a component's 3D shape, strain and deformation. After determination of critical areas (strain concentration areas) by experimental method, the numerical analysis of the equivalent 3D model was performed. 3D model vessel which includes material nonlinear properties of vessel was obtained by finite element analysis. Maximal stress and strain values were determined and results were comparable with experimental results. The aim of this study is to show behaviour of cylindrical pressure vessel with two nozzles subjected to internal pressure, using both 3D DIC method and numerical method. Maximum values of stress and strains,
as well as their positions are shown in the paper. Differences between these two methods in the area of the highest strain values were from 2.99% to 17.8%.",
publisher = "Innovation Center of Faculty of Mechanical Engineering, Belgrade",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2017",
title = "Numerical modelling and experimental validation of elastic - plastic behaviour of pressure vessel with nozzles",
pages = "40",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6061"
}

Balać, M., Grbović, A., Mitrović, N., Maneski, T., Milošević, M., Popović, P.,& Petrović, A.. (2017). Numerical modelling and experimental validation of elastic - plastic behaviour of pressure vessel with nozzles. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2017
Innovation Center of Faculty of Mechanical Engineering, Belgrade., 40.
https://hdl.handle.net/21.15107/rcub_machinery_6061

Balać M, Grbović A, Mitrović N, Maneski T, Milošević M, Popović P, Petrović A. Numerical modelling and experimental validation of elastic - plastic behaviour of pressure vessel with nozzles. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2017. 2017;:40.
https://hdl.handle.net/21.15107/rcub_machinery_6061 .

Balać, Martina, Grbović, Aleksandar, Mitrović, Nenad, Maneski, Taško, Milošević, Miloš, Popović, Predrag, Petrović, Aleksandar, "Numerical modelling and experimental validation of elastic - plastic behaviour of pressure vessel with nozzles" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2017 (2017):40,
https://hdl.handle.net/21.15107/rcub_machinery_6061 .