TY  - JOUR
AU  - Lukić, Nebojša
AU  - Ivanov, Toni
AU  - Svorcan, Jelena
AU  - Simonović, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7771
AB  - A novel concept of morphing airfoils, capable of changing camber and thickness, is proposed. A variable airfoil shape, defined by six input parameters, is achieved by allowing the three spinal points (at fixed axial positions) to slide vertically, while the upper and lower surfaces are determined by the lengths of the three corresponding ribs that are perpendicular to the spine. Thus, it is possible to find the most appropriate geometric configuration for a wide range of possible operating conditions often present with contemporary unmanned aerial vehicles. Shape optimizations for different Reynolds numbers and different cost functions are performed by coupling a genetic algorithm with simple panel method flow calculations. The obtained airfoils are presented and compared, whereas the proposed concept is validated by more advanced flow simulations. It appears that improvements in aerodynamic performance of nearly 20% can be expected at Re ranging from 0.05 × 106 to 0.1 × 106. The proposed methodology shows promise and can be applied to different types of lifting surfaces, including wing, tail or propeller blade segments. To check the viability of this method for producing airfoils that can be used in a practical sense, structural analysis of one of the obtained geometries using a simplified 1D finite element method as well as a more detailed 3D analysis are performed. The model is then 3D-printed on a fused deposition modeling (FDM) printer with a polyethylene terephthalate glycol (PETG) filament, and the capability of the airfoil to adequately morph between the two desired geometries is experimentally shown.
PB  - MDPI
T2  - Aerospace
T1  - Numerical Investigation and Optimization of a Morphing Airfoil Designed for Lower Reynolds Number
IS  - 4
SP  - 252
VL  - 11
DO  - 10.3390/aerospace11040252
ER  - 

@article{
author = "Lukić, Nebojša and Ivanov, Toni and Svorcan, Jelena and Simonović, Aleksandar",
year = "2024",
abstract = "A novel concept of morphing airfoils, capable of changing camber and thickness, is proposed. A variable airfoil shape, defined by six input parameters, is achieved by allowing the three spinal points (at fixed axial positions) to slide vertically, while the upper and lower surfaces are determined by the lengths of the three corresponding ribs that are perpendicular to the spine. Thus, it is possible to find the most appropriate geometric configuration for a wide range of possible operating conditions often present with contemporary unmanned aerial vehicles. Shape optimizations for different Reynolds numbers and different cost functions are performed by coupling a genetic algorithm with simple panel method flow calculations. The obtained airfoils are presented and compared, whereas the proposed concept is validated by more advanced flow simulations. It appears that improvements in aerodynamic performance of nearly 20% can be expected at Re ranging from 0.05 × 106 to 0.1 × 106. The proposed methodology shows promise and can be applied to different types of lifting surfaces, including wing, tail or propeller blade segments. To check the viability of this method for producing airfoils that can be used in a practical sense, structural analysis of one of the obtained geometries using a simplified 1D finite element method as well as a more detailed 3D analysis are performed. The model is then 3D-printed on a fused deposition modeling (FDM) printer with a polyethylene terephthalate glycol (PETG) filament, and the capability of the airfoil to adequately morph between the two desired geometries is experimentally shown.",
publisher = "MDPI",
journal = "Aerospace",
title = "Numerical Investigation and Optimization of a Morphing Airfoil Designed for Lower Reynolds Number",
number = "4",
pages = "252",
volume = "11",
doi = "10.3390/aerospace11040252"
}

Lukić, N., Ivanov, T., Svorcan, J.,& Simonović, A.. (2024). Numerical Investigation and Optimization of a Morphing Airfoil Designed for Lower Reynolds Number. in Aerospace
MDPI., 11(4), 252.
https://doi.org/10.3390/aerospace11040252

Lukić N, Ivanov T, Svorcan J, Simonović A. Numerical Investigation and Optimization of a Morphing Airfoil Designed for Lower Reynolds Number. in Aerospace. 2024;11(4):252.
doi:10.3390/aerospace11040252 .

Lukić, Nebojša, Ivanov, Toni, Svorcan, Jelena, Simonović, Aleksandar, "Numerical Investigation and Optimization of a Morphing Airfoil Designed for Lower Reynolds Number" in Aerospace, 11, no. 4 (2024):252,
https://doi.org/10.3390/aerospace11040252 . .

TY  - JOUR
AU  - Vorkapić, Miloš
AU  - Živojinović, Danijela
AU  - Kreculj, Dragan
AU  - Ivanov, Toni
AU  - Baltić, Marija
AU  - Simonović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5419
AB  - Reverse engineering (RE) aims to design a new replacement part based on the existing part. The goal is to perform a quality reproduction of the physical part with the best possible mechanical characteristics aiming to find optimal solutions regarding the shape and dimensions of the part. The
procedure is implemented through a series of steps: creating a digital 3D model, improving model parameters, and realizing products using additive technologies. In this paper, a review and 
implementation of the fundamental methodologies of RE were carried out on the example of a damaged protective cover with an unknown geometry and material essential for the function of a discontinued device with no technical documentation and spare parts. An optical scanning method, 3D CAD, FEA, and additive manufacturing were used to realize the reproduced part. It was shown that by utilizing RE the lifecycle of the device could be significantly extended with minimal cost.
PB  - Faculty of Mechanical Engineering, Belgrade
T2  - FME Transactions
T1  - Application of Additive Technology and Reverse Engineering in the Realization of Damaged Obsolete Parts
EP  - 38
IS  - 1
SP  - 31
VL  - 51
DO  - 10.5937/fme2301031V
ER  - 

@article{
author = "Vorkapić, Miloš and Živojinović, Danijela and Kreculj, Dragan and Ivanov, Toni and Baltić, Marija and Simonović, Aleksandar",
year = "2023",
abstract = "Reverse engineering (RE) aims to design a new replacement part based on the existing part. The goal is to perform a quality reproduction of the physical part with the best possible mechanical characteristics aiming to find optimal solutions regarding the shape and dimensions of the part. The
procedure is implemented through a series of steps: creating a digital 3D model, improving model parameters, and realizing products using additive technologies. In this paper, a review and 
implementation of the fundamental methodologies of RE were carried out on the example of a damaged protective cover with an unknown geometry and material essential for the function of a discontinued device with no technical documentation and spare parts. An optical scanning method, 3D CAD, FEA, and additive manufacturing were used to realize the reproduced part. It was shown that by utilizing RE the lifecycle of the device could be significantly extended with minimal cost.",
publisher = "Faculty of Mechanical Engineering, Belgrade",
journal = "FME Transactions",
title = "Application of Additive Technology and Reverse Engineering in the Realization of Damaged Obsolete Parts",
pages = "38-31",
number = "1",
volume = "51",
doi = "10.5937/fme2301031V"
}

Vorkapić, M., Živojinović, D., Kreculj, D., Ivanov, T., Baltić, M.,& Simonović, A.. (2023). Application of Additive Technology and Reverse Engineering in the Realization of Damaged Obsolete Parts. in FME Transactions
Faculty of Mechanical Engineering, Belgrade., 51(1), 31-38.
https://doi.org/10.5937/fme2301031V

Vorkapić M, Živojinović D, Kreculj D, Ivanov T, Baltić M, Simonović A. Application of Additive Technology and Reverse Engineering in the Realization of Damaged Obsolete Parts. in FME Transactions. 2023;51(1):31-38.
doi:10.5937/fme2301031V .

Vorkapić, Miloš, Živojinović, Danijela, Kreculj, Dragan, Ivanov, Toni, Baltić, Marija, Simonović, Aleksandar, "Application of Additive Technology and Reverse Engineering in the Realization of Damaged Obsolete Parts" in FME Transactions, 51, no. 1 (2023):31-38,
https://doi.org/10.5937/fme2301031V . .

TY  - JOUR
AU  - Kostić, Ivan
AU  - Tanović, Dragoljub
AU  - Kostić, Olivera
AU  - Abubaker, Ahmed Ali Irhayim
AU  - Simonović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7713
AB  - Purpose: Unmanned aerial vehicles (UAV) with remote and/or automated flight and mission controls have replaced airplanes with pilots in many important roles. This study aims to deal with computational fluid dynamics (CFD) analysis and development of the aerodynamic configuration of a multi-purpose UAV for low and medium altitudes. The main aerodynamic requirement was the application of the tandem wing (TW) concept, where both wings generate a positive lift and act as primary lifting devices. Design/methodology/approach: Initial design analyses of the UAV’s aerodynamic configuration were performed using ANSYS Fluent. In previous work in Fluent, the authors established a calculation model that has been verified by experiments and, with minor adjustments, could be applied for subsonic, transonic and supersonic flow analyses. Findings: The design evolved through eight development configurations, where the latest V8 satisfied all the posted longitudinal aerodynamic requirements. Both wings generate a substantial amount of positive lift, whereas the initial stall occurs first on the front wing, generating a natural nose-down stall recovery tendency. In the cruising flight regime, this configuration has the desired range of longitudinal static stability and its centre of pressure is in close proximity to the centre of gravity. Practical implications: The intermediate development version V8 with proper longitudinal aerodynamic characteristics presents a good starting point for future development steps that will involve the optimization of lateral-directional aerodynamics. Originality/value: Using contemporary CFD tools, a novel and original TW aerodynamic configuration have evolved within eight development stages, not being based on or derived from any existing designs.
PB  - Emerald Publishing
T2  - Aircraft Engineering and Aerospace Technology
T1  - Initial development of tandem wing UAV aerodynamic configuration
EP  - 441
IS  - 3
SP  - 431
VL  - 95
DO  - 10.1108/AEAT-06-2022-0149
ER  - 

@article{
author = "Kostić, Ivan and Tanović, Dragoljub and Kostić, Olivera and Abubaker, Ahmed Ali Irhayim and Simonović, Aleksandar",
year = "2023",
abstract = "Purpose: Unmanned aerial vehicles (UAV) with remote and/or automated flight and mission controls have replaced airplanes with pilots in many important roles. This study aims to deal with computational fluid dynamics (CFD) analysis and development of the aerodynamic configuration of a multi-purpose UAV for low and medium altitudes. The main aerodynamic requirement was the application of the tandem wing (TW) concept, where both wings generate a positive lift and act as primary lifting devices. Design/methodology/approach: Initial design analyses of the UAV’s aerodynamic configuration were performed using ANSYS Fluent. In previous work in Fluent, the authors established a calculation model that has been verified by experiments and, with minor adjustments, could be applied for subsonic, transonic and supersonic flow analyses. Findings: The design evolved through eight development configurations, where the latest V8 satisfied all the posted longitudinal aerodynamic requirements. Both wings generate a substantial amount of positive lift, whereas the initial stall occurs first on the front wing, generating a natural nose-down stall recovery tendency. In the cruising flight regime, this configuration has the desired range of longitudinal static stability and its centre of pressure is in close proximity to the centre of gravity. Practical implications: The intermediate development version V8 with proper longitudinal aerodynamic characteristics presents a good starting point for future development steps that will involve the optimization of lateral-directional aerodynamics. Originality/value: Using contemporary CFD tools, a novel and original TW aerodynamic configuration have evolved within eight development stages, not being based on or derived from any existing designs.",
publisher = "Emerald Publishing",
journal = "Aircraft Engineering and Aerospace Technology",
title = "Initial development of tandem wing UAV aerodynamic configuration",
pages = "441-431",
number = "3",
volume = "95",
doi = "10.1108/AEAT-06-2022-0149"
}

Kostić, I., Tanović, D., Kostić, O., Abubaker, A. A. I.,& Simonović, A.. (2023). Initial development of tandem wing UAV aerodynamic configuration. in Aircraft Engineering and Aerospace Technology
Emerald Publishing., 95(3), 431-441.
https://doi.org/10.1108/AEAT-06-2022-0149

Kostić I, Tanović D, Kostić O, Abubaker AAI, Simonović A. Initial development of tandem wing UAV aerodynamic configuration. in Aircraft Engineering and Aerospace Technology. 2023;95(3):431-441.
doi:10.1108/AEAT-06-2022-0149 .

Kostić, Ivan, Tanović, Dragoljub, Kostić, Olivera, Abubaker, Ahmed Ali Irhayim, Simonović, Aleksandar, "Initial development of tandem wing UAV aerodynamic configuration" in Aircraft Engineering and Aerospace Technology, 95, no. 3 (2023):431-441,
https://doi.org/10.1108/AEAT-06-2022-0149 . .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Ivanov, Toni
AU  - Simonović, Aleksandar
PY  - 2023
UR  - http://www.ssm.kg.ac.rs/congress_2023/papers/
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6979
AB  - Modern trends in the development of urban air vehicles and small-scale unmanned air vehicles require them to be as efficient as possible. One option is to improve their aerodynamic performance by semi-active boundary layer control (BLC) techniques, that are more economic and accessible through 3D printing, such as injection/blowing. Flow control generally serves to reduce BL thickness and friction drag, as well as to delay transition and separation. This computational study investigates and quantifies the change in lift and drag coefficients of NACA 23012 airfoil at the critical angle-of-attack (AoA) at M = 0.18 and Re = 1.8 million. Flow simulations are performed using the finite volume method in ANSYS Fluent. Clean and controlled flows are considered steady, incompressible, and viscous. Equations governing the flow are closed by k-ω SST turbulence model. The adopted numerical set-up is validated by available experimental data. Main observations on the possible improvements of aerodynamic performance at a higher angle-of-attack are presented and discussed.
PB  - Српско друштво за механику
C3  - 9th International Congress of the Serbian Society of Mechanics (ICSSM)
T1  - Improving airfoil performance by designed blowing
SP  - 91
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6979
ER  - 

@conference{
author = "Svorcan, Jelena and Ivanov, Toni and Simonović, Aleksandar",
year = "2023",
abstract = "Modern trends in the development of urban air vehicles and small-scale unmanned air vehicles require them to be as efficient as possible. One option is to improve their aerodynamic performance by semi-active boundary layer control (BLC) techniques, that are more economic and accessible through 3D printing, such as injection/blowing. Flow control generally serves to reduce BL thickness and friction drag, as well as to delay transition and separation. This computational study investigates and quantifies the change in lift and drag coefficients of NACA 23012 airfoil at the critical angle-of-attack (AoA) at M = 0.18 and Re = 1.8 million. Flow simulations are performed using the finite volume method in ANSYS Fluent. Clean and controlled flows are considered steady, incompressible, and viscous. Equations governing the flow are closed by k-ω SST turbulence model. The adopted numerical set-up is validated by available experimental data. Main observations on the possible improvements of aerodynamic performance at a higher angle-of-attack are presented and discussed.",
publisher = "Српско друштво за механику",
journal = "9th International Congress of the Serbian Society of Mechanics (ICSSM)",
title = "Improving airfoil performance by designed blowing",
pages = "91",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6979"
}

Svorcan, J., Ivanov, T.,& Simonović, A.. (2023). Improving airfoil performance by designed blowing. in 9th International Congress of the Serbian Society of Mechanics (ICSSM)
Српско друштво за механику., 91.
https://hdl.handle.net/21.15107/rcub_machinery_6979

Svorcan J, Ivanov T, Simonović A. Improving airfoil performance by designed blowing. in 9th International Congress of the Serbian Society of Mechanics (ICSSM). 2023;:91.
https://hdl.handle.net/21.15107/rcub_machinery_6979 .

Svorcan, Jelena, Ivanov, Toni, Simonović, Aleksandar, "Improving airfoil performance by designed blowing" in 9th International Congress of the Serbian Society of Mechanics (ICSSM) (2023):91,
https://hdl.handle.net/21.15107/rcub_machinery_6979 .

TY  - CONF
AU  - Ivanov, Toni
AU  - Ivanović, Milica
AU  - Zubić, Miloš
AU  - Simonović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7290
AB  - Jedan od ključnih elemenata za proces dekarbonizacije mogla bi biti upotreba vodonika u energetskim sektorima. Potencijal zamene fosilnih goriva održivo proizvedenim vodonikom odav-no je prepoznat. Zbog porasta troškova energije poslednjih godina, uticaja  konvencionalnih  goriva  na  životnu  sredinu  i  postignutog/predviđenog tehnološkog napretka u skladištenju i transportu, vo-donik postaje sve više izvodljivo rešenje u smislu primarnog izvora energije. Evropske zemlje su postavile ambiciozne planove za koriš-ćenje vodonika kao obnovljivog izvora energije. Mnogi istraživački projekti finansirani su iz grantova EU, dok je Evropska komisija po-stavila u martu 2022. godine plan za što veću nezavisnost od uvo-za fosilnih goriva, koji između ostalog za cilj ima proizvodnju 10 miliona tona vodonika, dok je 10 miliona tona planirano za uvoz do 2030. godine.Korišćenje vodonika kao izvora goriva u sektoru vazduhoplov-stva se takođe dosta razmatra poslednjih godina. Prednosti vodonika kao avionskog goriva su očigledne. Vodonik je održiv, ne proizvodi emisije štetnih gasova, ima veliku gustinu energije itd. Međutim, još uvek postoje velike tehničke poteškoće koje bi trebalo prevazići, što predstavlja izazov pri postavljanju vodonika kao održivog goriva za vazduhoplovstvo. U radu su predstavljeni i diskutovani najznačajniji izazovi, neka moguća rešenja i mogućnosti koje proizilaze iz upotre-be vodonika za vazduhoplovne propulzore.
C3  - Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.]
T1  - Izazovi i prilike vodonika kao održivog vazduhoplovnog goriva budućnosti
EP  - 44
IS  - 1
SP  - 39
VL  - 36
DO  - 10.24094/ptk.023.039
ER  - 

@conference{
author = "Ivanov, Toni and Ivanović, Milica and Zubić, Miloš and Simonović, Aleksandar",
year = "2023",
abstract = "Jedan od ključnih elemenata za proces dekarbonizacije mogla bi biti upotreba vodonika u energetskim sektorima. Potencijal zamene fosilnih goriva održivo proizvedenim vodonikom odav-no je prepoznat. Zbog porasta troškova energije poslednjih godina, uticaja  konvencionalnih  goriva  na  životnu  sredinu  i  postignutog/predviđenog tehnološkog napretka u skladištenju i transportu, vo-donik postaje sve više izvodljivo rešenje u smislu primarnog izvora energije. Evropske zemlje su postavile ambiciozne planove za koriš-ćenje vodonika kao obnovljivog izvora energije. Mnogi istraživački projekti finansirani su iz grantova EU, dok je Evropska komisija po-stavila u martu 2022. godine plan za što veću nezavisnost od uvo-za fosilnih goriva, koji između ostalog za cilj ima proizvodnju 10 miliona tona vodonika, dok je 10 miliona tona planirano za uvoz do 2030. godine.Korišćenje vodonika kao izvora goriva u sektoru vazduhoplov-stva se takođe dosta razmatra poslednjih godina. Prednosti vodonika kao avionskog goriva su očigledne. Vodonik je održiv, ne proizvodi emisije štetnih gasova, ima veliku gustinu energije itd. Međutim, još uvek postoje velike tehničke poteškoće koje bi trebalo prevazići, što predstavlja izazov pri postavljanju vodonika kao održivog goriva za vazduhoplovstvo. U radu su predstavljeni i diskutovani najznačajniji izazovi, neka moguća rešenja i mogućnosti koje proizilaze iz upotre-be vodonika za vazduhoplovne propulzore.",
journal = "Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.]",
title = "Izazovi i prilike vodonika kao održivog vazduhoplovnog goriva budućnosti",
pages = "44-39",
number = "1",
volume = "36",
doi = "10.24094/ptk.023.039"
}

Ivanov, T., Ivanović, M., Zubić, M.,& Simonović, A.. (2023). Izazovi i prilike vodonika kao održivog vazduhoplovnog goriva budućnosti. in Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.], 36(1), 39-44.
https://doi.org/10.24094/ptk.023.039

Ivanov T, Ivanović M, Zubić M, Simonović A. Izazovi i prilike vodonika kao održivog vazduhoplovnog goriva budućnosti. in Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.]. 2023;36(1):39-44.
doi:10.24094/ptk.023.039 .

Ivanov, Toni, Ivanović, Milica, Zubić, Miloš, Simonović, Aleksandar, "Izazovi i prilike vodonika kao održivog vazduhoplovnog goriva budućnosti" in Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.], 36, no. 1 (2023):39-44,
https://doi.org/10.24094/ptk.023.039 . .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Kovačević, Aleksandar
AU  - Popović, Lazar
AU  - Simonović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7073
PB  - Springer
PB  - SARES
C3  - Solutions for Maintenance Repair and Overhaul, Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2021
T1  - Sizing and Performance Analysis of a Single-Seat Tandem Helicopter
EP  - 227
SP  - 219
DO  - 10.1007/978-3-031-38446-2
ER  - 

@conference{
author = "Svorcan, Jelena and Kovačević, Aleksandar and Popović, Lazar and Simonović, Aleksandar",
year = "2023",
publisher = "Springer, SARES",
journal = "Solutions for Maintenance Repair and Overhaul, Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2021",
title = "Sizing and Performance Analysis of a Single-Seat Tandem Helicopter",
pages = "227-219",
doi = "10.1007/978-3-031-38446-2"
}

Svorcan, J., Kovačević, A., Popović, L.,& Simonović, A.. (2023). Sizing and Performance Analysis of a Single-Seat Tandem Helicopter. in Solutions for Maintenance Repair and Overhaul, Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2021
Springer., 219-227.
https://doi.org/10.1007/978-3-031-38446-2

Svorcan J, Kovačević A, Popović L, Simonović A. Sizing and Performance Analysis of a Single-Seat Tandem Helicopter. in Solutions for Maintenance Repair and Overhaul, Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2021. 2023;:219-227.
doi:10.1007/978-3-031-38446-2 .

Svorcan, Jelena, Kovačević, Aleksandar, Popović, Lazar, Simonović, Aleksandar, "Sizing and Performance Analysis of a Single-Seat Tandem Helicopter" in Solutions for Maintenance Repair and Overhaul, Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2021 (2023):219-227,
https://doi.org/10.1007/978-3-031-38446-2 . .

TY  - CONF
AU  - Kovačević, Aleksandar
AU  - Ivanov, Toni
AU  - Simonović, Aleksandar
AU  - Vorkapić, Miloš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5430
AB  - Veoma veliki porast upotrebe 3D štampe u poslednje dve decenije posledica je niza benefita koje ova proizvodna tehnologija nudi. U ovom radu analizirano je odstupanje geometrije štampanog modela u odnosu na CAD model. Izrada eksperimentalnog modela izvršena je metodom fuzionog taloženja filamenta (FDM) pri čemu je korišćen akrilonitril butadien stirol (ABS) materijal. Pokazano je kako se sa brojem iteracija odstupanje geometrije 3D štampanih modela u odnosu na CAD model smanjuje. U zaključku je dat pregled celokupnog procesa i preporuke u pogledu ograničenja upotrebe ove metode.
PB  - Uniiverzitet u Beogradu - Mašinski fakultet
C3  - Zbornik radova - 42. JUPITER konferencija / Proceedings - 42nd JUPITER Conference
T1  - Povećanje preciznosti izrade 3D štampanih delova primenom iterativne metode
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5430
ER  - 

@conference{
author = "Kovačević, Aleksandar and Ivanov, Toni and Simonović, Aleksandar and Vorkapić, Miloš",
year = "2022",
abstract = "Veoma veliki porast upotrebe 3D štampe u poslednje dve decenije posledica je niza benefita koje ova proizvodna tehnologija nudi. U ovom radu analizirano je odstupanje geometrije štampanog modela u odnosu na CAD model. Izrada eksperimentalnog modela izvršena je metodom fuzionog taloženja filamenta (FDM) pri čemu je korišćen akrilonitril butadien stirol (ABS) materijal. Pokazano je kako se sa brojem iteracija odstupanje geometrije 3D štampanih modela u odnosu na CAD model smanjuje. U zaključku je dat pregled celokupnog procesa i preporuke u pogledu ograničenja upotrebe ove metode.",
publisher = "Uniiverzitet u Beogradu - Mašinski fakultet",
journal = "Zbornik radova - 42. JUPITER konferencija / Proceedings - 42nd JUPITER Conference",
title = "Povećanje preciznosti izrade 3D štampanih delova primenom iterativne metode",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5430"
}

Kovačević, A., Ivanov, T., Simonović, A.,& Vorkapić, M.. (2022). Povećanje preciznosti izrade 3D štampanih delova primenom iterativne metode. in Zbornik radova - 42. JUPITER konferencija / Proceedings - 42nd JUPITER Conference
Uniiverzitet u Beogradu - Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_machinery_5430

Kovačević A, Ivanov T, Simonović A, Vorkapić M. Povećanje preciznosti izrade 3D štampanih delova primenom iterativne metode. in Zbornik radova - 42. JUPITER konferencija / Proceedings - 42nd JUPITER Conference. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_5430 .

Kovačević, Aleksandar, Ivanov, Toni, Simonović, Aleksandar, Vorkapić, Miloš, "Povećanje preciznosti izrade 3D štampanih delova primenom iterativne metode" in Zbornik radova - 42. JUPITER konferencija / Proceedings - 42nd JUPITER Conference (2022),
https://hdl.handle.net/21.15107/rcub_machinery_5430 .

TY  - CONF
AU  - Vorkapić, Miloš
AU  - Baltić, Marija
AU  - Ivanov, Toni
AU  - Simonović, Aleksandar
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5422
AB  - This paper presents the 3D printing technology for various textile materials. The application of this technology is vital in manufacturing various clothing items, primarily for specific purposes: hikers, firefighters, soldiers, and athletes. The installation of sensors, life function parameters monitoring and the usage of the new materials are the basis for the future development of the textile industry. Today, thermoplastic and textile materials are increasingly used in practice. Polylactic Acid (PLA) thermoplastic materials were used in the paper - in spool, Polyvinyl Chloride (PVC) and Nylon (in strips); while from textile materials, polyester, viscose and silk in the form of finished fabrics were considered. The technology of preparation of textile fibres for 3D printing using laser is shown. This technology makes it easier to combine textiles and molten filament. The pros and cons of joining different materials are discussed. Further research would go in the direction of making constructive solutions and testing the mechanical properties of various textile-polymer composites.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia
T1  - The significance of 3D printing in textile-polymer composite structures realization for special purpose
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5422
ER  - 

@conference{
author = "Vorkapić, Miloš and Baltić, Marija and Ivanov, Toni and Simonović, Aleksandar",
year = "2022",
abstract = "This paper presents the 3D printing technology for various textile materials. The application of this technology is vital in manufacturing various clothing items, primarily for specific purposes: hikers, firefighters, soldiers, and athletes. The installation of sensors, life function parameters monitoring and the usage of the new materials are the basis for the future development of the textile industry. Today, thermoplastic and textile materials are increasingly used in practice. Polylactic Acid (PLA) thermoplastic materials were used in the paper - in spool, Polyvinyl Chloride (PVC) and Nylon (in strips); while from textile materials, polyester, viscose and silk in the form of finished fabrics were considered. The technology of preparation of textile fibres for 3D printing using laser is shown. This technology makes it easier to combine textiles and molten filament. The pros and cons of joining different materials are discussed. Further research would go in the direction of making constructive solutions and testing the mechanical properties of various textile-polymer composites.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia",
title = "The significance of 3D printing in textile-polymer composite structures realization for special purpose",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5422"
}

Vorkapić, M., Baltić, M., Ivanov, T.,& Simonović, A.. (2022). The significance of 3D printing in textile-polymer composite structures realization for special purpose. in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_5422

Vorkapić M, Baltić M, Ivanov T, Simonović A. The significance of 3D printing in textile-polymer composite structures realization for special purpose. in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_5422 .

Vorkapić, Miloš, Baltić, Marija, Ivanov, Toni, Simonović, Aleksandar, "The significance of 3D printing in textile-polymer composite structures realization for special purpose" in Program and the Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies, CNN TECH 2022, 05 – 08 July 2022, Zlatibor, Serbia (2022),
https://hdl.handle.net/21.15107/rcub_machinery_5422 .

TY  - CONF
AU  - Ivanović, Milica
AU  - Vorkapić, Miloš
AU  - Simonović, Aleksandar
AU  - Ivanov, Toni
AU  - Stamenković, Igor
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5420
AB  - The use of threaded inserts embedded in plastic parts is very common in variety of industries including electronics, automotive, aerospace, medical, transportation, defense etc., particularly where frequent assembly and disassembly are required. Performed technique of placement the inserts in specimens is heat staking - pressing the heated insert into the mounting hole to melt the material surrounding the insert. Specimens were made of PLA and obtained using a commercial Creality Ender-6 3D printer. The square-shaped samples have dimensions of 20 x 20 x 4 [mm] with a 4.6 [mm] diameter central hole for placing brass inserts with M3 thread.
PB  - SIRAMM H2020-WIDESPREAD-2018-03 Project No. 857124, Horizon 2020
C3  - Workshop Programme and the Book of Abstracts - 2nd International Workshop on Structural Integrity of Additively Manufactured Materials – SIAMM22, 4th - 5th February 2022, Brno, Czech Republic
T1  - Influence of wall layer number around brass inserts in 3D printed specimens subjected to axial pull-out force
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5420
ER  - 

@conference{
author = "Ivanović, Milica and Vorkapić, Miloš and Simonović, Aleksandar and Ivanov, Toni and Stamenković, Igor",
year = "2022",
abstract = "The use of threaded inserts embedded in plastic parts is very common in variety of industries including electronics, automotive, aerospace, medical, transportation, defense etc., particularly where frequent assembly and disassembly are required. Performed technique of placement the inserts in specimens is heat staking - pressing the heated insert into the mounting hole to melt the material surrounding the insert. Specimens were made of PLA and obtained using a commercial Creality Ender-6 3D printer. The square-shaped samples have dimensions of 20 x 20 x 4 [mm] with a 4.6 [mm] diameter central hole for placing brass inserts with M3 thread.",
publisher = "SIRAMM H2020-WIDESPREAD-2018-03 Project No. 857124, Horizon 2020",
journal = "Workshop Programme and the Book of Abstracts - 2nd International Workshop on Structural Integrity of Additively Manufactured Materials – SIAMM22, 4th - 5th February 2022, Brno, Czech Republic",
title = "Influence of wall layer number around brass inserts in 3D printed specimens subjected to axial pull-out force",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5420"
}

Ivanović, M., Vorkapić, M., Simonović, A., Ivanov, T.,& Stamenković, I.. (2022). Influence of wall layer number around brass inserts in 3D printed specimens subjected to axial pull-out force. in Workshop Programme and the Book of Abstracts - 2nd International Workshop on Structural Integrity of Additively Manufactured Materials – SIAMM22, 4th - 5th February 2022, Brno, Czech Republic
SIRAMM H2020-WIDESPREAD-2018-03 Project No. 857124, Horizon 2020..
https://hdl.handle.net/21.15107/rcub_machinery_5420

Ivanović M, Vorkapić M, Simonović A, Ivanov T, Stamenković I. Influence of wall layer number around brass inserts in 3D printed specimens subjected to axial pull-out force. in Workshop Programme and the Book of Abstracts - 2nd International Workshop on Structural Integrity of Additively Manufactured Materials – SIAMM22, 4th - 5th February 2022, Brno, Czech Republic. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_5420 .

Ivanović, Milica, Vorkapić, Miloš, Simonović, Aleksandar, Ivanov, Toni, Stamenković, Igor, "Influence of wall layer number around brass inserts in 3D printed specimens subjected to axial pull-out force" in Workshop Programme and the Book of Abstracts - 2nd International Workshop on Structural Integrity of Additively Manufactured Materials – SIAMM22, 4th - 5th February 2022, Brno, Czech Republic (2022),
https://hdl.handle.net/21.15107/rcub_machinery_5420 .

TY  - CONF
AU  - Ivanović, Milica
AU  - Mališić, Snežana
AU  - Simonović, Aleksandar
AU  - Baltić, Marija
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6440
AB  - Global warming and ozone depletion issues have had an impact on novel approaches of integrating some of
the energy production systems. In present, fossil fuels such as oil, coal and natural gas still are the primary
sources of energy used to provide the majority of the cooling requirements in vapor compression systems. In
addition, this high energy-consumption systems work with substances that contribute to ozone layer depletion
and are typically based on fluorinated gases (F gases), that as well, can have a global warming impact
thousands of times greater than CO2. Much research has been done on reuse and waste heat utilization within
different systems to achieve a reduction in high carbon fuel consumption. The method that aims at improving
the value of the exergy of the available renewable energy sources is the absorption refrigeration cycle (ARC).
With ARC, the concept of “cooling with the heat“ can be achieved, with a variety of benefits such as integration
of the energy production systems, implementation of sustainable based technology in the industry of cooling,
the possibility of establishing a district cooling system, etc. The cooling demands can be met through utilization
of solar radiation, energy from biomass, waste heat from industrial processes, geothermal energy.
In the terms of the importance of low-temperature heat sources and the reuse of heat energy, currently present
researches have focus on identifying engineering and cost-effective approaches to enhance the efficiency of
an integrated system. That kind of system affects the output parameters of energy production and energy
consumption, so the possibilities to compare the different systems from the exergy and economic standpoint,
based on the different parameters are vast. The criteria of comparison and investigation the effects of
integrated systems in majority of cases would be based on: better performance at very low temperatures,
carbon dioxide emissions and cost savings. Despite the existence of different obstacles, the integration of
different energy production systems will have a considerable impact when it comes to overcoming the
challenges in the energy sector.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH
T1  - Perspectives of the integration of an absorption refrigeration cycle in energy production system
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6440
ER  - 

@conference{
author = "Ivanović, Milica and Mališić, Snežana and Simonović, Aleksandar and Baltić, Marija",
year = "2022",
abstract = "Global warming and ozone depletion issues have had an impact on novel approaches of integrating some of
the energy production systems. In present, fossil fuels such as oil, coal and natural gas still are the primary
sources of energy used to provide the majority of the cooling requirements in vapor compression systems. In
addition, this high energy-consumption systems work with substances that contribute to ozone layer depletion
and are typically based on fluorinated gases (F gases), that as well, can have a global warming impact
thousands of times greater than CO2. Much research has been done on reuse and waste heat utilization within
different systems to achieve a reduction in high carbon fuel consumption. The method that aims at improving
the value of the exergy of the available renewable energy sources is the absorption refrigeration cycle (ARC).
With ARC, the concept of “cooling with the heat“ can be achieved, with a variety of benefits such as integration
of the energy production systems, implementation of sustainable based technology in the industry of cooling,
the possibility of establishing a district cooling system, etc. The cooling demands can be met through utilization
of solar radiation, energy from biomass, waste heat from industrial processes, geothermal energy.
In the terms of the importance of low-temperature heat sources and the reuse of heat energy, currently present
researches have focus on identifying engineering and cost-effective approaches to enhance the efficiency of
an integrated system. That kind of system affects the output parameters of energy production and energy
consumption, so the possibilities to compare the different systems from the exergy and economic standpoint,
based on the different parameters are vast. The criteria of comparison and investigation the effects of
integrated systems in majority of cases would be based on: better performance at very low temperatures,
carbon dioxide emissions and cost savings. Despite the existence of different obstacles, the integration of
different energy production systems will have a considerable impact when it comes to overcoming the
challenges in the energy sector.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH",
title = "Perspectives of the integration of an absorption refrigeration cycle in energy production system",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6440"
}

Ivanović, M., Mališić, S., Simonović, A.,& Baltić, M.. (2022). Perspectives of the integration of an absorption refrigeration cycle in energy production system. in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH.
https://hdl.handle.net/21.15107/rcub_machinery_6440

Ivanović M, Mališić S, Simonović A, Baltić M. Perspectives of the integration of an absorption refrigeration cycle in energy production system. in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_6440 .

Ivanović, Milica, Mališić, Snežana, Simonović, Aleksandar, Baltić, Marija, "Perspectives of the integration of an absorption refrigeration cycle in energy production system" in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH (2022),
https://hdl.handle.net/21.15107/rcub_machinery_6440 .

TY  - JOUR
AU  - Vorkapić, Miloš
AU  - Mladenović, Ivana
AU  - Ivanov, Toni
AU  - Kovačević, Aleksandar
AU  - Mohammad Sakib, Hasan
AU  - Simonović, Aleksandar
AU  - Trajković, Isaak
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5423
AB  - Five series of specimens with two different print orientations (−45/45 and 0/90) and two print layer thicknesses (0.1 and 0.2 mm) were made. In total 60 specimens with 100% filament infill were made. One specimen series (20 pieces) was isolated as a reference or thermally untreated. Before the thermal treatment (annealing), two specimen moulding methods were used: NaCl powder (granulation 63 mm: 20 pieces) and Calcium Sulphate (Gypsum: 20 pieces). During the annealing, specimens immersed in NaCl powder were heated in a drying oven to the filament melting point (for PLA: 200°C, with a duration interval of 30 min), while the treatment of the heated specimens in gypsum was performed at a temperature of around 190°C, with duration interval of 3 h with the observed temperature inside the mould of about 100°C. An ultrasonic bath and a drying oven were used in the gypsum treatment. Temperature measurement and control during both annealing treatments were performed using a thermal imaging camera, while the temperature control inside the drying oven was performed using a digital thermometer. After treatment, the specimens in the moulds were cooled at room temperature, and the dimensions of annealing and untreated specimens were controlled. Surface morphology was characterised using scanning electron microscopy (SEM). The SEM analysis reveals improved internal structure after heat treatment of the PLA specimens. These results show that the investigated specimens after heat treatments had better structural properties than the referent specimens. Tensile testing on a universal testing machine in compliance with the ASTM D638 standard was also performed. The referent PLA specimen with −45/45 and layer thickness of 0.1 mm had the highest tensile stress value (64.08 MPa) while the specimen with minimal tensile stress value before fracture was 0/90, 0.2 mm (54.81 MPa). Heat treatment in gypsum showed the most significant increase in strength with −45/45 (0.1 mm) being the strongest (71.66 MPa) while the strongest specimen treated in sodium chloride was −45/45 (0.1 mm) with maximum tensile stress of 70.08 MPa. The mechanical characteristics of the PLA were characterised using the Vickers microhardness tester. The PLA microhardness value was calculated according to standards ASTM E384 and ISO 6507. The referent PLA specimen with −45/45 (0.2 mm) orientation shows the maximal microhardness value (125 MPa), and the minimal microhardness value was observed for the 0/90 (0.1 mm) orientation specimens (108 MPa). The heat treatment specimens in gypsum have a better hardness (185 MPa) than those treated in gypsum (165 MPa), with microhardness increasing by about 12%. The essence of the work is reflected in the additional filament processing to achieve a better structural and mechanical performance of the materials and reduce the anisotropy that is characteristic of 3D printing.
PB  - SAGE
T2  - Advances in Mechanical Engineering
T1  - Enhancing mechanical properties of 3D printed thermoplastic polymers by annealing in moulds
EP  - 15
IS  - 8
SP  - 1
VL  - 14
DO  - 10.1177/16878132221120737
ER  - 

@article{
author = "Vorkapić, Miloš and Mladenović, Ivana and Ivanov, Toni and Kovačević, Aleksandar and Mohammad Sakib, Hasan and Simonović, Aleksandar and Trajković, Isaak",
year = "2022",
abstract = "Five series of specimens with two different print orientations (−45/45 and 0/90) and two print layer thicknesses (0.1 and 0.2 mm) were made. In total 60 specimens with 100% filament infill were made. One specimen series (20 pieces) was isolated as a reference or thermally untreated. Before the thermal treatment (annealing), two specimen moulding methods were used: NaCl powder (granulation 63 mm: 20 pieces) and Calcium Sulphate (Gypsum: 20 pieces). During the annealing, specimens immersed in NaCl powder were heated in a drying oven to the filament melting point (for PLA: 200°C, with a duration interval of 30 min), while the treatment of the heated specimens in gypsum was performed at a temperature of around 190°C, with duration interval of 3 h with the observed temperature inside the mould of about 100°C. An ultrasonic bath and a drying oven were used in the gypsum treatment. Temperature measurement and control during both annealing treatments were performed using a thermal imaging camera, while the temperature control inside the drying oven was performed using a digital thermometer. After treatment, the specimens in the moulds were cooled at room temperature, and the dimensions of annealing and untreated specimens were controlled. Surface morphology was characterised using scanning electron microscopy (SEM). The SEM analysis reveals improved internal structure after heat treatment of the PLA specimens. These results show that the investigated specimens after heat treatments had better structural properties than the referent specimens. Tensile testing on a universal testing machine in compliance with the ASTM D638 standard was also performed. The referent PLA specimen with −45/45 and layer thickness of 0.1 mm had the highest tensile stress value (64.08 MPa) while the specimen with minimal tensile stress value before fracture was 0/90, 0.2 mm (54.81 MPa). Heat treatment in gypsum showed the most significant increase in strength with −45/45 (0.1 mm) being the strongest (71.66 MPa) while the strongest specimen treated in sodium chloride was −45/45 (0.1 mm) with maximum tensile stress of 70.08 MPa. The mechanical characteristics of the PLA were characterised using the Vickers microhardness tester. The PLA microhardness value was calculated according to standards ASTM E384 and ISO 6507. The referent PLA specimen with −45/45 (0.2 mm) orientation shows the maximal microhardness value (125 MPa), and the minimal microhardness value was observed for the 0/90 (0.1 mm) orientation specimens (108 MPa). The heat treatment specimens in gypsum have a better hardness (185 MPa) than those treated in gypsum (165 MPa), with microhardness increasing by about 12%. The essence of the work is reflected in the additional filament processing to achieve a better structural and mechanical performance of the materials and reduce the anisotropy that is characteristic of 3D printing.",
publisher = "SAGE",
journal = "Advances in Mechanical Engineering",
title = "Enhancing mechanical properties of 3D printed thermoplastic polymers by annealing in moulds",
pages = "15-1",
number = "8",
volume = "14",
doi = "10.1177/16878132221120737"
}

Vorkapić, M., Mladenović, I., Ivanov, T., Kovačević, A., Mohammad Sakib, H., Simonović, A.,& Trajković, I.. (2022). Enhancing mechanical properties of 3D printed thermoplastic polymers by annealing in moulds. in Advances in Mechanical Engineering
SAGE., 14(8), 1-15.
https://doi.org/10.1177/16878132221120737

Vorkapić M, Mladenović I, Ivanov T, Kovačević A, Mohammad Sakib H, Simonović A, Trajković I. Enhancing mechanical properties of 3D printed thermoplastic polymers by annealing in moulds. in Advances in Mechanical Engineering. 2022;14(8):1-15.
doi:10.1177/16878132221120737 .

Vorkapić, Miloš, Mladenović, Ivana, Ivanov, Toni, Kovačević, Aleksandar, Mohammad Sakib, Hasan, Simonović, Aleksandar, Trajković, Isaak, "Enhancing mechanical properties of 3D printed thermoplastic polymers by annealing in moulds" in Advances in Mechanical Engineering, 14, no. 8 (2022):1-15,
https://doi.org/10.1177/16878132221120737 . .

TY  - JOUR
AU  - Svorcan, Jelena
AU  - Kovačević, Aleksandar
AU  - Ivanov, Toni
AU  - Simonović, Aleksandar
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4210
AB  - Detailed studies of propeller flows are regaining both interest and significance worldwide, as the number of their different design and applications (particularly for futuristic urban air vehicles) continues to grow. An additional distinctive characteristic of small-scale unmanned air vehicles (UAV) propellers is that they are meant to operate in a wide range of (previously considered atypical) operating conditions, including backward flight, flight in the vicinity of obstacles,
hard/ground surfaces, etc. These specific requirements raise the issue of the effects of ground proximity on their aerodynamic performance. This paper computationally investigates flows around a small-scale, custom-made propeller in ground effect. Different ground distances are considered and novel thrust and power relations (dependencies) on them are proposed. In order to obtain sufficiently reliable and accurate results and capture the most significant flow features, Reynolds-averaged Navier-Stokes (RANS) equations are solved by finite volume method. In addition, interesting flow visualizations are presented. Although the obtained thrust trend correlates well with the conventionally used semi-empirical formula, more realistic estimations are obtained for small ground distances. Furthermore, the positive effects of ground vicinity on rotor aerodynamic performances are once again confirmed and quantified.
PB  - Belgrade :  Military Technical Institute - VTI
T2  - Scientific Technical Review
T1  - Numerical analysis of a propeller in ground effect
EP  - 13
IS  - 2
SP  - 8
VL  - 72
DO  - 10.5937/str2202008S
ER  - 

@article{
author = "Svorcan, Jelena and Kovačević, Aleksandar and Ivanov, Toni and Simonović, Aleksandar",
year = "2022",
abstract = "Detailed studies of propeller flows are regaining both interest and significance worldwide, as the number of their different design and applications (particularly for futuristic urban air vehicles) continues to grow. An additional distinctive characteristic of small-scale unmanned air vehicles (UAV) propellers is that they are meant to operate in a wide range of (previously considered atypical) operating conditions, including backward flight, flight in the vicinity of obstacles,
hard/ground surfaces, etc. These specific requirements raise the issue of the effects of ground proximity on their aerodynamic performance. This paper computationally investigates flows around a small-scale, custom-made propeller in ground effect. Different ground distances are considered and novel thrust and power relations (dependencies) on them are proposed. In order to obtain sufficiently reliable and accurate results and capture the most significant flow features, Reynolds-averaged Navier-Stokes (RANS) equations are solved by finite volume method. In addition, interesting flow visualizations are presented. Although the obtained thrust trend correlates well with the conventionally used semi-empirical formula, more realistic estimations are obtained for small ground distances. Furthermore, the positive effects of ground vicinity on rotor aerodynamic performances are once again confirmed and quantified.",
publisher = "Belgrade :  Military Technical Institute - VTI",
journal = "Scientific Technical Review",
title = "Numerical analysis of a propeller in ground effect",
pages = "13-8",
number = "2",
volume = "72",
doi = "10.5937/str2202008S"
}

Svorcan, J., Kovačević, A., Ivanov, T.,& Simonović, A.. (2022). Numerical analysis of a propeller in ground effect. in Scientific Technical Review
Belgrade :  Military Technical Institute - VTI., 72(2), 8-13.
https://doi.org/10.5937/str2202008S

Svorcan J, Kovačević A, Ivanov T, Simonović A. Numerical analysis of a propeller in ground effect. in Scientific Technical Review. 2022;72(2):8-13.
doi:10.5937/str2202008S .

Svorcan, Jelena, Kovačević, Aleksandar, Ivanov, Toni, Simonović, Aleksandar, "Numerical analysis of a propeller in ground effect" in Scientific Technical Review, 72, no. 2 (2022):8-13,
https://doi.org/10.5937/str2202008S . .

TY  - JOUR
AU  - Hasan, Mohammad Sakib
AU  - Svorcan, Jelena
AU  - Simonović, Aleksandar
AU  - Mirkov, Nikola
AU  - Kostić, Olivera
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3784
AB  - The ability of flying continuously over prolonged periods of time has become target of numerous research studies performed in recent years in both the fields of civil aviation and unmanned drones. High altitude platform stations are aircrafts that can operate for an extended period of time at altitudes 17 km above sea level and higher. The aim of this paper is to design and optimize a wing for such platforms and computationally investigate its aerodynamic performance. For that purpose, two-objective genetic algorithm, class shape transformation and panel method were combined and used to define different airfoils with the highest lift-to-drag ratio and maximal lift coefficient. Once the most suitable airfoil was chosen, polyhedral half wing was modeled and its aerodynamic performances were estimated using the CFD approach. Flow simulations of transitional flow at various angles-of-attack were realized in ANSYS FLUENT and various quantitative and qualitative results are presented, such as aerodynamic coefficient curves and flow visualizations. In the end, daily mission of the aircraft is simulated and its energy requirement is estimated. In order to be able to cruise above Serbia in July, an aircraft weighing 150 kg must accumulate 17 kWh of solar energy per day.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Optimal airfoil design and wing analysis for solar-powered high altitude platform station
EP  - 2175
IS  - 3
SP  - 2163
VL  - 26
DO  - 10.2298/TSCI210419241S
ER  - 

@article{
author = "Hasan, Mohammad Sakib and Svorcan, Jelena and Simonović, Aleksandar and Mirkov, Nikola and Kostić, Olivera",
year = "2022",
abstract = "The ability of flying continuously over prolonged periods of time has become target of numerous research studies performed in recent years in both the fields of civil aviation and unmanned drones. High altitude platform stations are aircrafts that can operate for an extended period of time at altitudes 17 km above sea level and higher. The aim of this paper is to design and optimize a wing for such platforms and computationally investigate its aerodynamic performance. For that purpose, two-objective genetic algorithm, class shape transformation and panel method were combined and used to define different airfoils with the highest lift-to-drag ratio and maximal lift coefficient. Once the most suitable airfoil was chosen, polyhedral half wing was modeled and its aerodynamic performances were estimated using the CFD approach. Flow simulations of transitional flow at various angles-of-attack were realized in ANSYS FLUENT and various quantitative and qualitative results are presented, such as aerodynamic coefficient curves and flow visualizations. In the end, daily mission of the aircraft is simulated and its energy requirement is estimated. In order to be able to cruise above Serbia in July, an aircraft weighing 150 kg must accumulate 17 kWh of solar energy per day.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Optimal airfoil design and wing analysis for solar-powered high altitude platform station",
pages = "2175-2163",
number = "3",
volume = "26",
doi = "10.2298/TSCI210419241S"
}

Hasan, M. S., Svorcan, J., Simonović, A., Mirkov, N.,& Kostić, O.. (2022). Optimal airfoil design and wing analysis for solar-powered high altitude platform station. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 26(3), 2163-2175.
https://doi.org/10.2298/TSCI210419241S

Hasan MS, Svorcan J, Simonović A, Mirkov N, Kostić O. Optimal airfoil design and wing analysis for solar-powered high altitude platform station. in Thermal Science. 2022;26(3):2163-2175.
doi:10.2298/TSCI210419241S .

Hasan, Mohammad Sakib, Svorcan, Jelena, Simonović, Aleksandar, Mirkov, Nikola, Kostić, Olivera, "Optimal airfoil design and wing analysis for solar-powered high altitude platform station" in Thermal Science, 26, no. 3 (2022):2163-2175,
https://doi.org/10.2298/TSCI210419241S . .

TY  - JOUR
AU  - Svorcan, Jelena
AU  - Kovacević, Aleksandar
AU  - Popović, Lazar
AU  - Simonović, Aleksandar
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3718
AB  - The paper presents a starting, but necessary comparative study between two diverse designs of single-seat tandem helicopter configuration, piston-propelled vs. electrically-driven. Both possibilities have their pros and cons, and need to be considered in detail, with respect to the initial requirements. In this investigation, the primary design objectives include 100 kg of payload as well as satisfactory performances in both hover and progressive flight. The comparison is conducted through the initial sizing procedures that enabled the estimation of takeoff mass (along with its main contributors), but also characteristic speeds, flight limits and basic helicopter performances. Used models and assumptions are explained in the paper. In the beginning, some essential advantages of tandem configuration helicopters are mentioned and accentuated. Also, future trends in electric aviation are considered. After that, total mass is decomposed into several main components and rotor dimensioning is performed. By assuming sufficient available power, it is possible to estimate the basic helicopter performances in both axisymmetric and progressive flight. Obtained results are presented graphically and numerically. In the end, some conclusions and recommendations for further research are given. For the time being, piston-propelled single-seat tandem helicopter can achieve better numerical results.
PB  - Inderscience Enterprises Ltd, Geneva
T2  - International Journal of Sustainable Aviation
T1  - Comparative study of piston vs. electric single-seat tandem helicopter
EP  - 14
IS  - 1
SP  - 1
VL  - 8
DO  - 10.1504/IJSA.2022.120614
ER  - 

@article{
author = "Svorcan, Jelena and Kovacević, Aleksandar and Popović, Lazar and Simonović, Aleksandar",
year = "2022",
abstract = "The paper presents a starting, but necessary comparative study between two diverse designs of single-seat tandem helicopter configuration, piston-propelled vs. electrically-driven. Both possibilities have their pros and cons, and need to be considered in detail, with respect to the initial requirements. In this investigation, the primary design objectives include 100 kg of payload as well as satisfactory performances in both hover and progressive flight. The comparison is conducted through the initial sizing procedures that enabled the estimation of takeoff mass (along with its main contributors), but also characteristic speeds, flight limits and basic helicopter performances. Used models and assumptions are explained in the paper. In the beginning, some essential advantages of tandem configuration helicopters are mentioned and accentuated. Also, future trends in electric aviation are considered. After that, total mass is decomposed into several main components and rotor dimensioning is performed. By assuming sufficient available power, it is possible to estimate the basic helicopter performances in both axisymmetric and progressive flight. Obtained results are presented graphically and numerically. In the end, some conclusions and recommendations for further research are given. For the time being, piston-propelled single-seat tandem helicopter can achieve better numerical results.",
publisher = "Inderscience Enterprises Ltd, Geneva",
journal = "International Journal of Sustainable Aviation",
title = "Comparative study of piston vs. electric single-seat tandem helicopter",
pages = "14-1",
number = "1",
volume = "8",
doi = "10.1504/IJSA.2022.120614"
}

Svorcan, J., Kovacević, A., Popović, L.,& Simonović, A.. (2022). Comparative study of piston vs. electric single-seat tandem helicopter. in International Journal of Sustainable Aviation
Inderscience Enterprises Ltd, Geneva., 8(1), 1-14.
https://doi.org/10.1504/IJSA.2022.120614

Svorcan J, Kovacević A, Popović L, Simonović A. Comparative study of piston vs. electric single-seat tandem helicopter. in International Journal of Sustainable Aviation. 2022;8(1):1-14.
doi:10.1504/IJSA.2022.120614 .

Svorcan, Jelena, Kovacević, Aleksandar, Popović, Lazar, Simonović, Aleksandar, "Comparative study of piston vs. electric single-seat tandem helicopter" in International Journal of Sustainable Aviation, 8, no. 1 (2022):1-14,
https://doi.org/10.1504/IJSA.2022.120614 . .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
AU  - Baltić, Marija
AU  - Simonović, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4257
AB  - Open systems, that include both water and air fractions, and whose behavior is highly dominated by the interaction between these two phases are particularly important and interesting for many industrial applications (e.g. energy production, maritime and aerial transport, food resources). Since the physics governing these flows is highly complex and incorporates many unexplained phenomena, novel physical models, as well as measurement techniques, are still being developed and tested in accordance with the particular problem that is being analyzed. Although real engineering cases often involve wind-wave interactions, stochastic waves, geometrically irregular boundaries, turbulence, wave interference etc, the main interests of this work are the effects of oncoming wind speed as well as adopted turbulence model on the initially still water surface and consequential wave formation. These aspects have to be considered in the development of amphibian aircrafts or ekranoplans since they take off from water surfaces while later aircrafts operate in the vicinity of water during the entire flight. Wave formation is also extremely important
for off-shore wind turbines. For the sake of simplicity, the conducted numerical simulations are planar. The fluids (air and water) are considered incompressible, while the flow is unsteady and turbulent. The unsteady Reynolds averaged Navier-Stokes equations are closed by one of the two two-equation turbulence models based on the Boussinesq hypothesis: realizable k-ε or k-ω SST model. The investigated wind speeds are 30 m/s, 50 m/s and 80 m/s, while the results are presented in the shape of water volume fractions. As expected, the increase in wind speed induces higher amplitude waves, when the effects of turbulence models also become important.
PB  - International Association for Hydro-Environment Engineering and Research (IAHR)
C3  - Abstract Book - 6th IAHR Europe Congress
T1  - The effects of wind speed and turbulence model on wave formation in open systems
EP  - 860
SP  - 859
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4257
ER  - 

@conference{
author = "Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni and Baltić, Marija and Simonović, Aleksandar",
year = "2021",
abstract = "Open systems, that include both water and air fractions, and whose behavior is highly dominated by the interaction between these two phases are particularly important and interesting for many industrial applications (e.g. energy production, maritime and aerial transport, food resources). Since the physics governing these flows is highly complex and incorporates many unexplained phenomena, novel physical models, as well as measurement techniques, are still being developed and tested in accordance with the particular problem that is being analyzed. Although real engineering cases often involve wind-wave interactions, stochastic waves, geometrically irregular boundaries, turbulence, wave interference etc, the main interests of this work are the effects of oncoming wind speed as well as adopted turbulence model on the initially still water surface and consequential wave formation. These aspects have to be considered in the development of amphibian aircrafts or ekranoplans since they take off from water surfaces while later aircrafts operate in the vicinity of water during the entire flight. Wave formation is also extremely important
for off-shore wind turbines. For the sake of simplicity, the conducted numerical simulations are planar. The fluids (air and water) are considered incompressible, while the flow is unsteady and turbulent. The unsteady Reynolds averaged Navier-Stokes equations are closed by one of the two two-equation turbulence models based on the Boussinesq hypothesis: realizable k-ε or k-ω SST model. The investigated wind speeds are 30 m/s, 50 m/s and 80 m/s, while the results are presented in the shape of water volume fractions. As expected, the increase in wind speed induces higher amplitude waves, when the effects of turbulence models also become important.",
publisher = "International Association for Hydro-Environment Engineering and Research (IAHR)",
journal = "Abstract Book - 6th IAHR Europe Congress",
title = "The effects of wind speed and turbulence model on wave formation in open systems",
pages = "860-859",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4257"
}

Svorcan, J., Peković, O., Ivanov, T., Baltić, M.,& Simonović, A.. (2021). The effects of wind speed and turbulence model on wave formation in open systems. in Abstract Book - 6th IAHR Europe Congress
International Association for Hydro-Environment Engineering and Research (IAHR)., 859-860.
https://hdl.handle.net/21.15107/rcub_machinery_4257

Svorcan J, Peković O, Ivanov T, Baltić M, Simonović A. The effects of wind speed and turbulence model on wave formation in open systems. in Abstract Book - 6th IAHR Europe Congress. 2021;:859-860.
https://hdl.handle.net/21.15107/rcub_machinery_4257 .

Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, Baltić, Marija, Simonović, Aleksandar, "The effects of wind speed and turbulence model on wave formation in open systems" in Abstract Book - 6th IAHR Europe Congress (2021):859-860,
https://hdl.handle.net/21.15107/rcub_machinery_4257 .

TY  - CONF
AU  - Ivanović, Milica
AU  - Simonović, Aleksandar
AU  - Ivanov, Toni
AU  - Kovačević, Aleksandar
AU  - Tanović, Dragoljub
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6438
AB  - In the terms of cost reduction, design flexibility, time and environmentally friendly process, additive manufacturing is gaining acceptance as an innovative technology in the construction industry. The energy demand estimation, as one of the primary parts of building industry nowadays, imposed a need for constant development of the existing materials. Taking into consideration stresses in the material and thermal transmittance value, several mixes that have adequate consistency and workability are described. The common is concrete base consisting of cement, sand and additives. Other elements include geopolymers, fibers, soil, clay, gravel, sulfur. Considering standards and regulations for the maximum thermal transmittance value (U-value), in the countries of Eastern Europe specifically, all considered mixes had greater U-value. The various wall configuration with different cavities inside (empty or filled with sand) enables better thermal properties of the wall that can obtain U-value less than legislation prescribes.
C3  - International conference – East Europe conference on AM materials- EECAM21
T1  - A green building technique: thermal transmittance value of the different materials used in 3D printed houses
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6438
ER  - 

@conference{
author = "Ivanović, Milica and Simonović, Aleksandar and Ivanov, Toni and Kovačević, Aleksandar and Tanović, Dragoljub",
year = "2021",
abstract = "In the terms of cost reduction, design flexibility, time and environmentally friendly process, additive manufacturing is gaining acceptance as an innovative technology in the construction industry. The energy demand estimation, as one of the primary parts of building industry nowadays, imposed a need for constant development of the existing materials. Taking into consideration stresses in the material and thermal transmittance value, several mixes that have adequate consistency and workability are described. The common is concrete base consisting of cement, sand and additives. Other elements include geopolymers, fibers, soil, clay, gravel, sulfur. Considering standards and regulations for the maximum thermal transmittance value (U-value), in the countries of Eastern Europe specifically, all considered mixes had greater U-value. The various wall configuration with different cavities inside (empty or filled with sand) enables better thermal properties of the wall that can obtain U-value less than legislation prescribes.",
journal = "International conference – East Europe conference on AM materials- EECAM21",
title = "A green building technique: thermal transmittance value of the different materials used in 3D printed houses",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6438"
}

Ivanović, M., Simonović, A., Ivanov, T., Kovačević, A.,& Tanović, D.. (2021). A green building technique: thermal transmittance value of the different materials used in 3D printed houses. in International conference – East Europe conference on AM materials- EECAM21.
https://hdl.handle.net/21.15107/rcub_machinery_6438

Ivanović M, Simonović A, Ivanov T, Kovačević A, Tanović D. A green building technique: thermal transmittance value of the different materials used in 3D printed houses. in International conference – East Europe conference on AM materials- EECAM21. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_6438 .

Ivanović, Milica, Simonović, Aleksandar, Ivanov, Toni, Kovačević, Aleksandar, Tanović, Dragoljub, "A green building technique: thermal transmittance value of the different materials used in 3D printed houses" in International conference – East Europe conference on AM materials- EECAM21 (2021),
https://hdl.handle.net/21.15107/rcub_machinery_6438 .

TY  - JOUR
AU  - Vasić, Zoran M.
AU  - Maksimović, Katarina
AU  - Maksimović, Mirko S.
AU  - Vasović, Ivana
AU  - Vidanović, Nenad
AU  - Simonović, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3578
AB  - The thermo mechanical buckling and post-buckling behavior of layered composite shell type structure are considered with the finite element method under the combination of temperature load and applied mechanical loads. To account for through-thickness shear deformation effects, the thermal elastic, and higher-order shear deformation theory is used in this study. The refined higher order theories, that takes into account the effect of transverse normal deformation, is used to develop discrete finite element models for the thermal buckling analysis of composite laminates. Attention in this study is focused on analyzing the temperature effects on buckling and post-buckling behavior of thin shell structural components. Special attention in this paper is focused on studying of values of the hole in curved panel on thermal buckling behavior and consequently to expend and upgrade previously conducted investigation. Using finite element method, a broader observation of the critical temperature of loss of stability depending on the size of the hole was conducted. The presented numerical results based on higher-order shear deformation theory can be used as versatile and accurate method for buckling and post-buckling analyzes of thin-walled laminated plates under thermo mechanical loads.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Buckling and post-buckling behavior of shell type structures under thermo mechanical loads
EP  - 4357
IS  - 6
SP  - 4347
VL  - 25
DO  - 10.2298/TSCI201129079V
ER  - 

@article{
author = "Vasić, Zoran M. and Maksimović, Katarina and Maksimović, Mirko S. and Vasović, Ivana and Vidanović, Nenad and Simonović, Aleksandar",
year = "2021",
abstract = "The thermo mechanical buckling and post-buckling behavior of layered composite shell type structure are considered with the finite element method under the combination of temperature load and applied mechanical loads. To account for through-thickness shear deformation effects, the thermal elastic, and higher-order shear deformation theory is used in this study. The refined higher order theories, that takes into account the effect of transverse normal deformation, is used to develop discrete finite element models for the thermal buckling analysis of composite laminates. Attention in this study is focused on analyzing the temperature effects on buckling and post-buckling behavior of thin shell structural components. Special attention in this paper is focused on studying of values of the hole in curved panel on thermal buckling behavior and consequently to expend and upgrade previously conducted investigation. Using finite element method, a broader observation of the critical temperature of loss of stability depending on the size of the hole was conducted. The presented numerical results based on higher-order shear deformation theory can be used as versatile and accurate method for buckling and post-buckling analyzes of thin-walled laminated plates under thermo mechanical loads.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Buckling and post-buckling behavior of shell type structures under thermo mechanical loads",
pages = "4357-4347",
number = "6",
volume = "25",
doi = "10.2298/TSCI201129079V"
}

Vasić, Z. M., Maksimović, K., Maksimović, M. S., Vasović, I., Vidanović, N.,& Simonović, A.. (2021). Buckling and post-buckling behavior of shell type structures under thermo mechanical loads. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 25(6), 4347-4357.
https://doi.org/10.2298/TSCI201129079V

Vasić ZM, Maksimović K, Maksimović MS, Vasović I, Vidanović N, Simonović A. Buckling and post-buckling behavior of shell type structures under thermo mechanical loads. in Thermal Science. 2021;25(6):4347-4357.
doi:10.2298/TSCI201129079V .

Vasić, Zoran M., Maksimović, Katarina, Maksimović, Mirko S., Vasović, Ivana, Vidanović, Nenad, Simonović, Aleksandar, "Buckling and post-buckling behavior of shell type structures under thermo mechanical loads" in Thermal Science, 25, no. 6 (2021):4347-4357,
https://doi.org/10.2298/TSCI201129079V . .

TY  - JOUR
AU  - Perić, Bojan M.
AU  - Simonović, Aleksandar
AU  - Vorkapić, Miloš
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3486
AB  - The purpose of this paper is to explore and define an adequate numerical setting for the computation of aerodynamic performances of wind turbines of various shapes and sizes, which offers the possibility of choosing a suitable approach of minimal complexity for the future research. Here, mechanical power, thrust, power coefficient, thrust coefficient, pressure coefficient, pressure distribution along the blade, relative velocity contoure, at different wind speeds and streamlines were considered by two different methods: the blade element momentum and CFD, within which three different turbulence models were analyzed. The estimation of the mentioned aerodynamic performances was carried out on two different wind turbine blades. The obtained solutions were compared with the experimental and nominal (up-scaled) values, available in the literature. Although the flow was considered as steady, a satisfactory correlation between numerical and experimental results was achieved. The comparison between results also showed, the significance of selection, regarding the complexity and geometry of the analyzed wind turbine blade, the most appropriate numerical approach for computation of aerodynamic performances.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Comparative analysis of numerical computational techniques for determination of the wind turbine aerodynamic performances
EP  - 2515
IS  - 4
SP  - 2503
VL  - 25
DO  - 10.2298/TSCI200216175P
ER  - 

@article{
author = "Perić, Bojan M. and Simonović, Aleksandar and Vorkapić, Miloš",
year = "2021",
abstract = "The purpose of this paper is to explore and define an adequate numerical setting for the computation of aerodynamic performances of wind turbines of various shapes and sizes, which offers the possibility of choosing a suitable approach of minimal complexity for the future research. Here, mechanical power, thrust, power coefficient, thrust coefficient, pressure coefficient, pressure distribution along the blade, relative velocity contoure, at different wind speeds and streamlines were considered by two different methods: the blade element momentum and CFD, within which three different turbulence models were analyzed. The estimation of the mentioned aerodynamic performances was carried out on two different wind turbine blades. The obtained solutions were compared with the experimental and nominal (up-scaled) values, available in the literature. Although the flow was considered as steady, a satisfactory correlation between numerical and experimental results was achieved. The comparison between results also showed, the significance of selection, regarding the complexity and geometry of the analyzed wind turbine blade, the most appropriate numerical approach for computation of aerodynamic performances.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Comparative analysis of numerical computational techniques for determination of the wind turbine aerodynamic performances",
pages = "2515-2503",
number = "4",
volume = "25",
doi = "10.2298/TSCI200216175P"
}

Perić, B. M., Simonović, A.,& Vorkapić, M.. (2021). Comparative analysis of numerical computational techniques for determination of the wind turbine aerodynamic performances. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 25(4), 2503-2515.
https://doi.org/10.2298/TSCI200216175P

Perić BM, Simonović A, Vorkapić M. Comparative analysis of numerical computational techniques for determination of the wind turbine aerodynamic performances. in Thermal Science. 2021;25(4):2503-2515.
doi:10.2298/TSCI200216175P .

Perić, Bojan M., Simonović, Aleksandar, Vorkapić, Miloš, "Comparative analysis of numerical computational techniques for determination of the wind turbine aerodynamic performances" in Thermal Science, 25, no. 4 (2021):2503-2515,
https://doi.org/10.2298/TSCI200216175P . .

TY  - JOUR
AU  - Raković, Dragan
AU  - Simonović, Aleksandar
AU  - Grbović, Aleksandar
AU  - Radović, Ljubica
AU  - Vorkapić, Miloš
AU  - Krstić, Branimir
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3490
AB  - This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Fatigue fracture analysis of helicopter landing gear cross tube
VL  - 129
DO  - 10.1016/j.engfailanal.2021.105672
ER  - 

@article{
author = "Raković, Dragan and Simonović, Aleksandar and Grbović, Aleksandar and Radović, Ljubica and Vorkapić, Miloš and Krstić, Branimir",
year = "2021",
abstract = "This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Fatigue fracture analysis of helicopter landing gear cross tube",
volume = "129",
doi = "10.1016/j.engfailanal.2021.105672"
}

Raković, D., Simonović, A., Grbović, A., Radović, L., Vorkapić, M.,& Krstić, B.. (2021). Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 129.
https://doi.org/10.1016/j.engfailanal.2021.105672

Raković D, Simonović A, Grbović A, Radović L, Vorkapić M, Krstić B. Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis. 2021;129.
doi:10.1016/j.engfailanal.2021.105672 .

Raković, Dragan, Simonović, Aleksandar, Grbović, Aleksandar, Radović, Ljubica, Vorkapić, Miloš, Krstić, Branimir, "Fatigue fracture analysis of helicopter landing gear cross tube" in Engineering Failure Analysis, 129 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105672 . .

TY  - JOUR
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Simonović, Aleksandar
AU  - Tanović, Dragoljub
AU  - Hasan, Mohammad Sakib
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3547
AB  - Wind energy extraction is one of the fastest developing engineering branches today. Number of installed wind turbines is constantly increasing. Appropriate solutions for urban environments are quiet, structurally simple and affordable small-scale vertical-axis wind turbines (VAWTs). Due to small efficiency, particularly in low and variable winds, main topic here is development of optimal flow concentrator that locally augments wind velocity, facilitates turbine start and increases generated power. Conceptual design was performed by combining finite volume method and artificial intelligence (AI). Smaller set of computational results (velocity profiles induced by existence of different concentrators in flow field) was used for creation, training and validation of several artificial neural networks. Multi-objective optimization of concentrator geometric parameters was realized through coupling of generated neural networks with genetic algorithm. Final solution from the acquired Pareto set is studied in more detail. Resulting computed velocity field is illustrated. Aerodynamic performances of small-scale VAWT with and without optimal flow concentrator are estimated and compared. The performed research demonstrates that, with use of flow concentrator, average increase in wind speed of 20%-25% can be expected. It also proves that contemporary AI techniques can significantly facilitate and accelerate design processes in the field of wind engineering.
PB  - Sage Publications Ltd, London
T2  - Advances in Mechanical Engineering
T1  - Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm
IS  - 3
VL  - 13
DO  - 10.1177/16878140211009009
ER  - 

@article{
author = "Svorcan, Jelena and Peković, Ognjen and Simonović, Aleksandar and Tanović, Dragoljub and Hasan, Mohammad Sakib",
year = "2021",
abstract = "Wind energy extraction is one of the fastest developing engineering branches today. Number of installed wind turbines is constantly increasing. Appropriate solutions for urban environments are quiet, structurally simple and affordable small-scale vertical-axis wind turbines (VAWTs). Due to small efficiency, particularly in low and variable winds, main topic here is development of optimal flow concentrator that locally augments wind velocity, facilitates turbine start and increases generated power. Conceptual design was performed by combining finite volume method and artificial intelligence (AI). Smaller set of computational results (velocity profiles induced by existence of different concentrators in flow field) was used for creation, training and validation of several artificial neural networks. Multi-objective optimization of concentrator geometric parameters was realized through coupling of generated neural networks with genetic algorithm. Final solution from the acquired Pareto set is studied in more detail. Resulting computed velocity field is illustrated. Aerodynamic performances of small-scale VAWT with and without optimal flow concentrator are estimated and compared. The performed research demonstrates that, with use of flow concentrator, average increase in wind speed of 20%-25% can be expected. It also proves that contemporary AI techniques can significantly facilitate and accelerate design processes in the field of wind engineering.",
publisher = "Sage Publications Ltd, London",
journal = "Advances in Mechanical Engineering",
title = "Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm",
number = "3",
volume = "13",
doi = "10.1177/16878140211009009"
}

Svorcan, J., Peković, O., Simonović, A., Tanović, D.,& Hasan, M. S.. (2021). Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm. in Advances in Mechanical Engineering
Sage Publications Ltd, London., 13(3).
https://doi.org/10.1177/16878140211009009

Svorcan J, Peković O, Simonović A, Tanović D, Hasan MS. Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm. in Advances in Mechanical Engineering. 2021;13(3).
doi:10.1177/16878140211009009 .

Svorcan, Jelena, Peković, Ognjen, Simonović, Aleksandar, Tanović, Dragoljub, Hasan, Mohammad Sakib, "Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm" in Advances in Mechanical Engineering, 13, no. 3 (2021),
https://doi.org/10.1177/16878140211009009 . .

TY  - CHAP
AU  - Raković, D.M.
AU  - Simonović, Aleksandar
AU  - Grbović, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3669
AB  - The capabilities of UAVs for civil and military operations are being largely improved by the advances made in UAV technology hence allowing UAVs to become a wide spread tool for a wide range of possible applications. This spread increases the need for more efficient and accurate navigation and positioning which means that improvement of existing and innovative new solutions for this challenge is going to remain of high interest to researchers. In this paper some of the most usual positioning and navigation methodologies are presented and comparisons between their advantages and disadvantages are given.
PB  - Springer
T2  - Lecture Notes in Networks and Systems
T1  - Uav positioning and navigation - review
EP  - 256
SP  - 220
VL  - 153
DO  - 10.1007/978-3-030-58362-0_14
ER  - 

@inbook{
author = "Raković, D.M. and Simonović, Aleksandar and Grbović, Aleksandar",
year = "2021",
abstract = "The capabilities of UAVs for civil and military operations are being largely improved by the advances made in UAV technology hence allowing UAVs to become a wide spread tool for a wide range of possible applications. This spread increases the need for more efficient and accurate navigation and positioning which means that improvement of existing and innovative new solutions for this challenge is going to remain of high interest to researchers. In this paper some of the most usual positioning and navigation methodologies are presented and comparisons between their advantages and disadvantages are given.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Uav positioning and navigation - review",
pages = "256-220",
volume = "153",
doi = "10.1007/978-3-030-58362-0_14"
}

Raković, D.M., Simonović, A.,& Grbović, A.. (2021). Uav positioning and navigation - review. in Lecture Notes in Networks and Systems
Springer., 153, 220-256.
https://doi.org/10.1007/978-3-030-58362-0_14

Raković D, Simonović A, Grbović A. Uav positioning and navigation - review. in Lecture Notes in Networks and Systems. 2021;153:220-256.
doi:10.1007/978-3-030-58362-0_14 .

Raković, D.M., Simonović, Aleksandar, Grbović, Aleksandar, "Uav positioning and navigation - review" in Lecture Notes in Networks and Systems, 153 (2021):220-256,
https://doi.org/10.1007/978-3-030-58362-0_14 . .

TY  - CHAP
AU  - Vorkapić, Miloš
AU  - Simonović, Aleksandar
AU  - Ivanov, Toni
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3674
AB  - Additive manufacturing technology helped many organizations to save money in the product design process by reducing prototype costs, and also by providing a means for early evaluation and decision making. The idea of this paper is to design an electronics enclosure for an intelligent industrial pressure transmitter, using the additive technology. All enclosure elements are made on a 3D printer WANHAO duplicator i3 plus, using PLA materials. The enclosure realization, from CAD drawings to the finished model, enables a designer to correct existing errors, or make certain modifications as required by end-users. A process is described that enables designers to review their decisions at any stage of product realization, thus providing much more freedom in rapid prototyping. In this example, the advantages and disadvantages of additive manufacturing over conventional manufacturing are outlined. Some deficiencies have also been observed, such as mechanical damage to surfaces, burning of surfaces, tearing of prints, and surface roughness. To mitigate such irregularities, both mechanical and chemical finishing methods were used. The example confirmed that the finishing methods can affect the final enclosure dimensions and shape. Further prototype development should focus more on print quality, which depends on the shape of surfaces, the accuracy of the geometry, the uniformity of structure and shape, material density, and the resolution of details.
PB  - Springer
T2  - Lecture Notes in Networks and Systems
T1  - Algorithm for applying 3d printing in prototype realization – case: Enclosure for an industrial pressure transmitter
EP  - 129
SP  - 112
VL  - 153
DO  - 10.1007/978-3-030-58362-0_8
ER  - 

@inbook{
author = "Vorkapić, Miloš and Simonović, Aleksandar and Ivanov, Toni",
year = "2021",
abstract = "Additive manufacturing technology helped many organizations to save money in the product design process by reducing prototype costs, and also by providing a means for early evaluation and decision making. The idea of this paper is to design an electronics enclosure for an intelligent industrial pressure transmitter, using the additive technology. All enclosure elements are made on a 3D printer WANHAO duplicator i3 plus, using PLA materials. The enclosure realization, from CAD drawings to the finished model, enables a designer to correct existing errors, or make certain modifications as required by end-users. A process is described that enables designers to review their decisions at any stage of product realization, thus providing much more freedom in rapid prototyping. In this example, the advantages and disadvantages of additive manufacturing over conventional manufacturing are outlined. Some deficiencies have also been observed, such as mechanical damage to surfaces, burning of surfaces, tearing of prints, and surface roughness. To mitigate such irregularities, both mechanical and chemical finishing methods were used. The example confirmed that the finishing methods can affect the final enclosure dimensions and shape. Further prototype development should focus more on print quality, which depends on the shape of surfaces, the accuracy of the geometry, the uniformity of structure and shape, material density, and the resolution of details.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Algorithm for applying 3d printing in prototype realization – case: Enclosure for an industrial pressure transmitter",
pages = "129-112",
volume = "153",
doi = "10.1007/978-3-030-58362-0_8"
}

Vorkapić, M., Simonović, A.,& Ivanov, T.. (2021). Algorithm for applying 3d printing in prototype realization – case: Enclosure for an industrial pressure transmitter. in Lecture Notes in Networks and Systems
Springer., 153, 112-129.
https://doi.org/10.1007/978-3-030-58362-0_8

Vorkapić M, Simonović A, Ivanov T. Algorithm for applying 3d printing in prototype realization – case: Enclosure for an industrial pressure transmitter. in Lecture Notes in Networks and Systems. 2021;153:112-129.
doi:10.1007/978-3-030-58362-0_8 .

Vorkapić, Miloš, Simonović, Aleksandar, Ivanov, Toni, "Algorithm for applying 3d printing in prototype realization – case: Enclosure for an industrial pressure transmitter" in Lecture Notes in Networks and Systems, 153 (2021):112-129,
https://doi.org/10.1007/978-3-030-58362-0_8 . .

TY  - CONF
AU  - Simonović, Aleksandar
AU  - Kovačević, Aleksandar
AU  - Ivanov, Toni
AU  - Vorkapić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5432
AB  - The trend of wind turbine development has a special significance in the exploitation of renewable energy sources. At higher altitudes, we have better wind energy utilization higher speed and their conversion are achieved in the best possible use of wind turbines. The development of new technologies opens space for a new generation of wind turbines with a 20MW rated power. In recent years, various feasibility studies have shown that wind turbines with large rotor diameter and high towers give positive shifts in the analysis of structural and aerodynamic parameters, with a focus on reducing overall mass and damping vibrations due to the use of new materials. In this paper, the evolution of high power wind turbines and an overview of the technological development of the basic components of the turbine will be presented. Perspectives in the further development of wind turbines with rated power above 20MW will be also considered.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS, Beograd
C3  - 8th International Conference on Renewable Electrical Power Sources (8. Međunarodna konferencija o obnovljivim izvorima električne energije), ICREPS 2020, October 16, Belgrade, Serbia
T1  - Wind turbine beyond 20 MW – Technology perspective
EP  - 134
SP  - 123
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5432
ER  - 

@conference{
author = "Simonović, Aleksandar and Kovačević, Aleksandar and Ivanov, Toni and Vorkapić, Miloš",
year = "2020",
abstract = "The trend of wind turbine development has a special significance in the exploitation of renewable energy sources. At higher altitudes, we have better wind energy utilization higher speed and their conversion are achieved in the best possible use of wind turbines. The development of new technologies opens space for a new generation of wind turbines with a 20MW rated power. In recent years, various feasibility studies have shown that wind turbines with large rotor diameter and high towers give positive shifts in the analysis of structural and aerodynamic parameters, with a focus on reducing overall mass and damping vibrations due to the use of new materials. In this paper, the evolution of high power wind turbines and an overview of the technological development of the basic components of the turbine will be presented. Perspectives in the further development of wind turbines with rated power above 20MW will be also considered.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS, Beograd",
journal = "8th International Conference on Renewable Electrical Power Sources (8. Međunarodna konferencija o obnovljivim izvorima električne energije), ICREPS 2020, October 16, Belgrade, Serbia",
title = "Wind turbine beyond 20 MW – Technology perspective",
pages = "134-123",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5432"
}

Simonović, A., Kovačević, A., Ivanov, T.,& Vorkapić, M.. (2020). Wind turbine beyond 20 MW – Technology perspective. in 8th International Conference on Renewable Electrical Power Sources (8. Međunarodna konferencija o obnovljivim izvorima električne energije), ICREPS 2020, October 16, Belgrade, Serbia
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS, Beograd., 123-134.
https://hdl.handle.net/21.15107/rcub_machinery_5432

Simonović A, Kovačević A, Ivanov T, Vorkapić M. Wind turbine beyond 20 MW – Technology perspective. in 8th International Conference on Renewable Electrical Power Sources (8. Međunarodna konferencija o obnovljivim izvorima električne energije), ICREPS 2020, October 16, Belgrade, Serbia. 2020;:123-134.
https://hdl.handle.net/21.15107/rcub_machinery_5432 .

Simonović, Aleksandar, Kovačević, Aleksandar, Ivanov, Toni, Vorkapić, Miloš, "Wind turbine beyond 20 MW – Technology perspective" in 8th International Conference on Renewable Electrical Power Sources (8. Međunarodna konferencija o obnovljivim izvorima električne energije), ICREPS 2020, October 16, Belgrade, Serbia (2020):123-134,
https://hdl.handle.net/21.15107/rcub_machinery_5432 .

TY  - CONF
AU  - Živojinović, Danijela
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Simonović, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4282
AB  - Aditivna proizvodnja pomaže organizacijama da uštede u procesu projektovanja i da smanje
troškove realizacije prototipova. U ovom radu analizirana je kutija elektronike. Kućište je modelirano u nekom od 3D softverskih paketa, zatim je urađena strukturna analiza i na kraju je izrađen model na 3D štampaču. Kutija je izrađena od biorazgradivog termoplastičnog materijala PLA. Ideja ovog rada je da se pokaže kako aditivna tehnologija može da zameni konvencionalnu tehnologiju na onim mestima koja nisu kritična i rizična. Strukturna analiza pokazala je da plastično kućište može da izdrži opterećenje od 150 daN. To je važno sa aspekta izrade plastičnog proizvoda umesto metalnog.
PB  - Univerzitet u Beogradu - Mašinski fakultet
C3  - Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
T1  - Kutija elektronike – strukturna analiza i izrada
EP  - 2.46
SP  - 2.41
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4282
ER  - 

@conference{
author = "Živojinović, Danijela and Svorcan, Jelena and Baltić, Marija and Simonović, Aleksandar",
year = "2020",
abstract = "Aditivna proizvodnja pomaže organizacijama da uštede u procesu projektovanja i da smanje
troškove realizacije prototipova. U ovom radu analizirana je kutija elektronike. Kućište je modelirano u nekom od 3D softverskih paketa, zatim je urađena strukturna analiza i na kraju je izrađen model na 3D štampaču. Kutija je izrađena od biorazgradivog termoplastičnog materijala PLA. Ideja ovog rada je da se pokaže kako aditivna tehnologija može da zameni konvencionalnu tehnologiju na onim mestima koja nisu kritična i rizična. Strukturna analiza pokazala je da plastično kućište može da izdrži opterećenje od 150 daN. To je važno sa aspekta izrade plastičnog proizvoda umesto metalnog.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet",
journal = "Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum",
title = "Kutija elektronike – strukturna analiza i izrada",
pages = "2.46-2.41",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4282"
}

Živojinović, D., Svorcan, J., Baltić, M.,& Simonović, A.. (2020). Kutija elektronike – strukturna analiza i izrada. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
Univerzitet u Beogradu - Mašinski fakultet., 2.41-2.46.
https://hdl.handle.net/21.15107/rcub_machinery_4282

Živojinović D, Svorcan J, Baltić M, Simonović A. Kutija elektronike – strukturna analiza i izrada. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum. 2020;:2.41-2.46.
https://hdl.handle.net/21.15107/rcub_machinery_4282 .

Živojinović, Danijela, Svorcan, Jelena, Baltić, Marija, Simonović, Aleksandar, "Kutija elektronike – strukturna analiza i izrada" in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum (2020):2.41-2.46,
https://hdl.handle.net/21.15107/rcub_machinery_4282 .

TY  - CONF
AU  - Peković, Ognjen
AU  - Svorcan, Jelena
AU  - Simonović, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4252
AB  - Isogeometric analysis (IGA) is an extension to conventional Finite Element Method (FEM) developed with the idea of unifying Computer Aided Design (CAD) and Computer Aided Analysis (CAE) into an efficient methodology for structural design and optimization. The isogeometric formulation of finite elements is based on NURBS (non-uniform rational B-splines) basis functions of varying degree, the same functions that are used in CAD for geometry definition. In this way, operation of mesh generation in IGA is unnecessary since the geometry that is defined as parametric representation of NURBS is used for representation of field variables. Behavior of laminated plate elements based on isogeometric formulation and different kinematic models is
presented and different aspects of implementation are discussed. Chosen numerical examples highlight the advantages of the isogeometric laminated plate elements over the conventional finite element formulation of laminated plates.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Static isogeometric analysis of laminated composite plates based on different equivalent layer theories
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4252
ER  - 

@conference{
author = "Peković, Ognjen and Svorcan, Jelena and Simonović, Aleksandar",
year = "2020",
abstract = "Isogeometric analysis (IGA) is an extension to conventional Finite Element Method (FEM) developed with the idea of unifying Computer Aided Design (CAD) and Computer Aided Analysis (CAE) into an efficient methodology for structural design and optimization. The isogeometric formulation of finite elements is based on NURBS (non-uniform rational B-splines) basis functions of varying degree, the same functions that are used in CAD for geometry definition. In this way, operation of mesh generation in IGA is unnecessary since the geometry that is defined as parametric representation of NURBS is used for representation of field variables. Behavior of laminated plate elements based on isogeometric formulation and different kinematic models is
presented and different aspects of implementation are discussed. Chosen numerical examples highlight the advantages of the isogeometric laminated plate elements over the conventional finite element formulation of laminated plates.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Static isogeometric analysis of laminated composite plates based on different equivalent layer theories",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4252"
}

Peković, O., Svorcan, J.,& Simonović, A.. (2020). Static isogeometric analysis of laminated composite plates based on different equivalent layer theories. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 63.
https://hdl.handle.net/21.15107/rcub_machinery_4252

Peković O, Svorcan J, Simonović A. Static isogeometric analysis of laminated composite plates based on different equivalent layer theories. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2020;:63.
https://hdl.handle.net/21.15107/rcub_machinery_4252 .

Peković, Ognjen, Svorcan, Jelena, Simonović, Aleksandar, "Static isogeometric analysis of laminated composite plates based on different equivalent layer theories" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2020):63,
https://hdl.handle.net/21.15107/rcub_machinery_4252 .