TY  - PAT
AU  - Živanović, Saša
AU  - Vorkapić, Nikola
AU  - Slavković, Nikola
AU  - Dimić, Zoran
AU  - Vidaković, Jelena
PY  - 2024-04-01
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7790
AB  - Pronalazak se odnosi na multifunkcionalnu i rekonfigurabilnu mašinu alatku za brzu izradu prototipova koja predstavlja novi koncept 3-osne CNC mašine sa horizontalnom obrtnom osom, koja radi u polarno-cilindričnim koordinatama i omogućava jedinstvenu integraciju tri proizvodne tehnologije na jednoj mašini: glodanje, lasersku obradu i dodavanje materijala (3D štampanje). Mašina svoju rekonfigurabilnost ostvaruje zamenom završnih uređaja koji mogu biti glava za glodanje, laserska glava ili glava za 3D štampu, uz razvijeni rekonfigurabilni upravljački softver koji podržava sve tri tehnologije. Mašina se sastoji od nepokretne noseće strukture (1), na kojoj se nalaze horizontalne vođice (10) po kojima je klizno pomerljiv klizač (9) ose X na kome se nalaze vođice (12) po kojima je klizno pomerljiv klizač (11) ose Z, na koji se postavlja ili glavno vreteno (13A) ili laserska glava (13B) ili glava za 3D štampu (13C) kao završni uređaj. Noseća struktura (1) sadrži se i obrtnu osu A’ koju čine pogonski motor (3) koji pomoću kaišnog para (19) prenosi obrtni moment na obrtno vreteno (2), uležišteno nosačima (20) ležaja, sa steznom glavom (21) gde se postavlja obradak. Na nosećoj strukturi (1) se nalaze i vođice (15) po kojima je klizno pomerljiv nosač (14) zadnjeg šiljka koji se koristi kao dodatni oslonac pri stezanju dužih obradaka u cilju povećanja krutosti.
PB  - Zavod za intelektualnu svojinu, Beograd, Knjeginje Ljubice 5
T2  - Broj 1805 U1, Isprava o malom patentu od 01.4.2024.
T1  - Multifunkcionalna i rekonfigurabilna mašina alatka za brzu izradu prototipova glodanjem, laserskom obradom i dodavanjem materijala u polarno cilindričnim koordinatama
EP  - 9
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7790
ER  - 

@misc{
author = "Živanović, Saša and Vorkapić, Nikola and Slavković, Nikola and Dimić, Zoran and Vidaković, Jelena",
year = "2024-04-01",
abstract = "Pronalazak se odnosi na multifunkcionalnu i rekonfigurabilnu mašinu alatku za brzu izradu prototipova koja predstavlja novi koncept 3-osne CNC mašine sa horizontalnom obrtnom osom, koja radi u polarno-cilindričnim koordinatama i omogućava jedinstvenu integraciju tri proizvodne tehnologije na jednoj mašini: glodanje, lasersku obradu i dodavanje materijala (3D štampanje). Mašina svoju rekonfigurabilnost ostvaruje zamenom završnih uređaja koji mogu biti glava za glodanje, laserska glava ili glava za 3D štampu, uz razvijeni rekonfigurabilni upravljački softver koji podržava sve tri tehnologije. Mašina se sastoji od nepokretne noseće strukture (1), na kojoj se nalaze horizontalne vođice (10) po kojima je klizno pomerljiv klizač (9) ose X na kome se nalaze vođice (12) po kojima je klizno pomerljiv klizač (11) ose Z, na koji se postavlja ili glavno vreteno (13A) ili laserska glava (13B) ili glava za 3D štampu (13C) kao završni uređaj. Noseća struktura (1) sadrži se i obrtnu osu A’ koju čine pogonski motor (3) koji pomoću kaišnog para (19) prenosi obrtni moment na obrtno vreteno (2), uležišteno nosačima (20) ležaja, sa steznom glavom (21) gde se postavlja obradak. Na nosećoj strukturi (1) se nalaze i vođice (15) po kojima je klizno pomerljiv nosač (14) zadnjeg šiljka koji se koristi kao dodatni oslonac pri stezanju dužih obradaka u cilju povećanja krutosti.",
publisher = "Zavod za intelektualnu svojinu, Beograd, Knjeginje Ljubice 5",
journal = "Broj 1805 U1, Isprava o malom patentu od 01.4.2024.",
title = "Multifunkcionalna i rekonfigurabilna mašina alatka za brzu izradu prototipova glodanjem, laserskom obradom i dodavanjem materijala u polarno cilindričnim koordinatama",
pages = "9-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7790"
}

Živanović, S., Vorkapić, N., Slavković, N., Dimić, Z.,& Vidaković, J.. (2024-04-01). Multifunkcionalna i rekonfigurabilna mašina alatka za brzu izradu prototipova glodanjem, laserskom obradom i dodavanjem materijala u polarno cilindričnim koordinatama. in Broj 1805 U1, Isprava o malom patentu od 01.4.2024.
Zavod za intelektualnu svojinu, Beograd, Knjeginje Ljubice 5., 1-9.
https://hdl.handle.net/21.15107/rcub_machinery_7790

Živanović S, Vorkapić N, Slavković N, Dimić Z, Vidaković J. Multifunkcionalna i rekonfigurabilna mašina alatka za brzu izradu prototipova glodanjem, laserskom obradom i dodavanjem materijala u polarno cilindričnim koordinatama. in Broj 1805 U1, Isprava o malom patentu od 01.4.2024.. 2024;:1-9.
https://hdl.handle.net/21.15107/rcub_machinery_7790 .

Živanović, Saša, Vorkapić, Nikola, Slavković, Nikola, Dimić, Zoran, Vidaković, Jelena, "Multifunkcionalna i rekonfigurabilna mašina alatka za brzu izradu prototipova glodanjem, laserskom obradom i dodavanjem materijala u polarno cilindričnim koordinatama" in Broj 1805 U1, Isprava o malom patentu od 01.4.2024. (2024-04-01):1-9,
https://hdl.handle.net/21.15107/rcub_machinery_7790 .

TY  - JOUR
AU  - Vukšić Popović, Marija
AU  - Momčilović, Dejan
AU  - Tanasković, Jovan
AU  - Sedmak, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7789
AB  - This paper presents an analysis of train screw coupling used mainly in Europe as mechanical
connection of wagons in train. An analysis of train breaks apart incidents revealed that less than
30 % of the cases were caused by elements of the screw coupling, with coupling links accounting
for only 5 % of the failures. Therefore, the investigation focused on testing the coupling links,
which are safety elements of the screw coupling. The coupling links underwent various inspections,
including visual inspection, dimensional control, non-destructive testing, examination
of chemical composition, and mechanical tests. Dimensional control found longitudinal plastic
deformations of the links. Chemical examination revealed that the links were made of different
material than recommended, but their mechanical properties generally met the recommended
values. However, variations were observed among different links, likely due to different rates of
deformation during testing and operational conditions. Overall, the analysis and inspections
provided insights into the condition and performance of coupling links in the screw coupling
system, highlighting the importance of monitoring and maintaining these elements to ensure safe
and efficient railway operations.
PB  - Elsevier
T2  - Engineering Failure Analysis
T1  - Testing of the condition and performance of coupling links from screw couplings of train
SP  - 108331
VL  - 161
DO  - 10.1016/j.engfailanal.2024.108331
ER  - 

@article{
author = "Vukšić Popović, Marija and Momčilović, Dejan and Tanasković, Jovan and Sedmak, Aleksandar",
year = "2024",
abstract = "This paper presents an analysis of train screw coupling used mainly in Europe as mechanical
connection of wagons in train. An analysis of train breaks apart incidents revealed that less than
30 % of the cases were caused by elements of the screw coupling, with coupling links accounting
for only 5 % of the failures. Therefore, the investigation focused on testing the coupling links,
which are safety elements of the screw coupling. The coupling links underwent various inspections,
including visual inspection, dimensional control, non-destructive testing, examination
of chemical composition, and mechanical tests. Dimensional control found longitudinal plastic
deformations of the links. Chemical examination revealed that the links were made of different
material than recommended, but their mechanical properties generally met the recommended
values. However, variations were observed among different links, likely due to different rates of
deformation during testing and operational conditions. Overall, the analysis and inspections
provided insights into the condition and performance of coupling links in the screw coupling
system, highlighting the importance of monitoring and maintaining these elements to ensure safe
and efficient railway operations.",
publisher = "Elsevier",
journal = "Engineering Failure Analysis",
title = "Testing of the condition and performance of coupling links from screw couplings of train",
pages = "108331",
volume = "161",
doi = "10.1016/j.engfailanal.2024.108331"
}

Vukšić Popović, M., Momčilović, D., Tanasković, J.,& Sedmak, A.. (2024). Testing of the condition and performance of coupling links from screw couplings of train. in Engineering Failure Analysis
Elsevier., 161, 108331.
https://doi.org/10.1016/j.engfailanal.2024.108331

Vukšić Popović M, Momčilović D, Tanasković J, Sedmak A. Testing of the condition and performance of coupling links from screw couplings of train. in Engineering Failure Analysis. 2024;161:108331.
doi:10.1016/j.engfailanal.2024.108331 .

Vukšić Popović, Marija, Momčilović, Dejan, Tanasković, Jovan, Sedmak, Aleksandar, "Testing of the condition and performance of coupling links from screw couplings of train" in Engineering Failure Analysis, 161 (2024):108331,
https://doi.org/10.1016/j.engfailanal.2024.108331 . .

TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Montanari, Matteo
AU  - Golubović, Zorana
AU  - Marghitas, Mihai
AU  - Spagnoli, Andrea
AU  - Brighenti, Roberto
AU  - Sedmak, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7785
AB  - In recent years, Additive Manufacturing (AM) has become an increasingly popular method in industrial
applications for fabricating components with complex geometries, offering several benefits over traditional
(subtractive) manufacturing methods. Among all available AM technologies, ‘‘vat photopolymerization’’ is still
a reliable approach for manufacturing high-resolution components at relatively small costs. This particular
AM technology is based on the photopolymerization process where 3D objects are created by light-induced
solidification and it has been broadly developed and used in the past decades. Depending on the employed
light source there are three different subtypes of this technology, namely: SLA, DLP, and mSLA. Among all
three listed, the Masked Stereolithography Apparatus (mSLA) technology has emerged as a promising approach
due to the much simpler AM machine construction compared to the other two. However, the mechanical
properties of mSLA components have not been studied extensively, hence there is a lack of knowledge of
how AM process parameters and post-processing treatments affect the final mechanical properties of mSLA
components. This work presents an experimental investigation of the compressive and flexural mechanical
responses of components produced through this relatively new AM technology. A series of static and cyclic
tests were conducted with varying layer thickness and post-curing times. It is demonstrated that a thorough
optimization of the mentioned variables is required to obtain parts with the desired mechanical properties.
PB  - Elsevier
T2  - Theoretical and Applied Fracture Mechanics
T1  - Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology
IS  - 104406
VL  - 131
DO  - 10.1016/j.tafmec.2024.104406
ER  - 

@article{
author = "Milovanović, Aleksa and Montanari, Matteo and Golubović, Zorana and Marghitas, Mihai and Spagnoli, Andrea and Brighenti, Roberto and Sedmak, Aleksandar",
year = "2024",
abstract = "In recent years, Additive Manufacturing (AM) has become an increasingly popular method in industrial
applications for fabricating components with complex geometries, offering several benefits over traditional
(subtractive) manufacturing methods. Among all available AM technologies, ‘‘vat photopolymerization’’ is still
a reliable approach for manufacturing high-resolution components at relatively small costs. This particular
AM technology is based on the photopolymerization process where 3D objects are created by light-induced
solidification and it has been broadly developed and used in the past decades. Depending on the employed
light source there are three different subtypes of this technology, namely: SLA, DLP, and mSLA. Among all
three listed, the Masked Stereolithography Apparatus (mSLA) technology has emerged as a promising approach
due to the much simpler AM machine construction compared to the other two. However, the mechanical
properties of mSLA components have not been studied extensively, hence there is a lack of knowledge of
how AM process parameters and post-processing treatments affect the final mechanical properties of mSLA
components. This work presents an experimental investigation of the compressive and flexural mechanical
responses of components produced through this relatively new AM technology. A series of static and cyclic
tests were conducted with varying layer thickness and post-curing times. It is demonstrated that a thorough
optimization of the mentioned variables is required to obtain parts with the desired mechanical properties.",
publisher = "Elsevier",
journal = "Theoretical and Applied Fracture Mechanics",
title = "Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology",
number = "104406",
volume = "131",
doi = "10.1016/j.tafmec.2024.104406"
}

Milovanović, A., Montanari, M., Golubović, Z., Marghitas, M., Spagnoli, A., Brighenti, R.,& Sedmak, A.. (2024). Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology. in Theoretical and Applied Fracture Mechanics
Elsevier., 131(104406).
https://doi.org/10.1016/j.tafmec.2024.104406

Milovanović A, Montanari M, Golubović Z, Marghitas M, Spagnoli A, Brighenti R, Sedmak A. Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology. in Theoretical and Applied Fracture Mechanics. 2024;131(104406).
doi:10.1016/j.tafmec.2024.104406 .

Milovanović, Aleksa, Montanari, Matteo, Golubović, Zorana, Marghitas, Mihai, Spagnoli, Andrea, Brighenti, Roberto, Sedmak, Aleksandar, "Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology" in Theoretical and Applied Fracture Mechanics, 131, no. 104406 (2024),
https://doi.org/10.1016/j.tafmec.2024.104406 . .

TY  - JOUR
AU  - Milutinović, Milan
AU  - Vasilić, Goran
AU  - Živanović, Saša
AU  - Dimić, Zoran
AU  - Kokotović, Branko
AU  - Slavković, Nikola
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7772
AB  - Brazed carbide profile mill cutters are widely used in the machining of wood, wood materials, and plastic to form various functional and aesthetic surfaces. Tools of this kind are used in serial and mass production and they are built today using very costly 5-axis grinding machines supported by specialized CAM software that is very expensive too. The paper first developed the possible concept of 5-axis grinding of brazed profile mill cutters using universal diamond grinding wheel shapes. The developed concept of 5-axis grinding served as a basis for the developed approach for 3+2-axis grinding of the brazed formmill cutters which is the essence of this paper. Verification of this set approach of 3+2-axis grinding is performed on a developed functional prototype of a simple 3+2-axis grinder (Axes XYZ are CNC controlled, axes B and C are unpowered axes and have fixed positions during grinding). Based on the established 3+2 grinding strategy complete grinding of a complex profile has been performed on a developed functional prototype. Shape and measures of the cutting edge profile achieved by grinding are inspected on an optical measuring system and showed exceptional results. The established 3+2-axis method of grinding
is an economically successful alternative to costly 5-axis grinding machines, as well as to specialized software, presented in the paper through experimental and practical application.
PB  - Springer-Verlag London Ltd.
T2  - The International Journal of Advanced Manufacturing Technology
T1  - Calculation of wheel path for 3+2-axis grinding of brazed carbide profilemill cutters for wood and plastic
EP  - 4620
SP  - 4603
VL  - 130
DO  - 10.1007/s00170-024-12992-3
ER  - 

@article{
author = "Milutinović, Milan and Vasilić, Goran and Živanović, Saša and Dimić, Zoran and Kokotović, Branko and Slavković, Nikola",
year = "2024",
abstract = "Brazed carbide profile mill cutters are widely used in the machining of wood, wood materials, and plastic to form various functional and aesthetic surfaces. Tools of this kind are used in serial and mass production and they are built today using very costly 5-axis grinding machines supported by specialized CAM software that is very expensive too. The paper first developed the possible concept of 5-axis grinding of brazed profile mill cutters using universal diamond grinding wheel shapes. The developed concept of 5-axis grinding served as a basis for the developed approach for 3+2-axis grinding of the brazed formmill cutters which is the essence of this paper. Verification of this set approach of 3+2-axis grinding is performed on a developed functional prototype of a simple 3+2-axis grinder (Axes XYZ are CNC controlled, axes B and C are unpowered axes and have fixed positions during grinding). Based on the established 3+2 grinding strategy complete grinding of a complex profile has been performed on a developed functional prototype. Shape and measures of the cutting edge profile achieved by grinding are inspected on an optical measuring system and showed exceptional results. The established 3+2-axis method of grinding
is an economically successful alternative to costly 5-axis grinding machines, as well as to specialized software, presented in the paper through experimental and practical application.",
publisher = "Springer-Verlag London Ltd.",
journal = "The International Journal of Advanced Manufacturing Technology",
title = "Calculation of wheel path for 3+2-axis grinding of brazed carbide profilemill cutters for wood and plastic",
pages = "4620-4603",
volume = "130",
doi = "10.1007/s00170-024-12992-3"
}

Milutinović, M., Vasilić, G., Živanović, S., Dimić, Z., Kokotović, B.,& Slavković, N.. (2024). Calculation of wheel path for 3+2-axis grinding of brazed carbide profilemill cutters for wood and plastic. in The International Journal of Advanced Manufacturing Technology
Springer-Verlag London Ltd.., 130, 4603-4620.
https://doi.org/10.1007/s00170-024-12992-3

Milutinović M, Vasilić G, Živanović S, Dimić Z, Kokotović B, Slavković N. Calculation of wheel path for 3+2-axis grinding of brazed carbide profilemill cutters for wood and plastic. in The International Journal of Advanced Manufacturing Technology. 2024;130:4603-4620.
doi:10.1007/s00170-024-12992-3 .

Milutinović, Milan, Vasilić, Goran, Živanović, Saša, Dimić, Zoran, Kokotović, Branko, Slavković, Nikola, "Calculation of wheel path for 3+2-axis grinding of brazed carbide profilemill cutters for wood and plastic" in The International Journal of Advanced Manufacturing Technology, 130 (2024):4603-4620,
https://doi.org/10.1007/s00170-024-12992-3 . .

TY  - JOUR
AU  - Mitrović, Nenad
AU  - Golubović, Zorana
AU  - Mitrović, Aleksandra
AU  - Travica, Milan
AU  - Trajković, Isaak
AU  - Milošević, Miloš
AU  - Petrović, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7781
AB  - The three-point bending test is a valuable method for evaluating the mechanical properties of 3D-printed biomaterials, which can be used in various applications. The use of 3D printing in specimen preparation enables precise control over material composition and microstructure, facilitating the investigation of different printing parameters and advanced materials. The traditional approach to analyzing the mechanical properties of a material using a three-point bending test has the disadvantage that it provides only global information about the material’s behavior. This means that it does not provide detailed insight into the local strain distribution within the material. However, the 2D Digital Image Correlation (DIC) method offers additional insight, especially in terms of strain localization. DIC is an optical technique that measures full-field displacements and strains on the surface of a sample. PLA and enhanced PLA-X material were utilized to create three-point bending samples. The aim of this paper was to analyze and compare the influence of aging on the mechanical properties of PLA and enhanced PLA-X materials using three-point bending coupled with the DIC method. The results showed statistically significant differences between the PLA and PLA-X, for both the new and aged materials. The aged PLA samples had the highest average value of maximal force around 68 N, which was an increase of 8.8% compared to the new PLA samples. On the other hand, the aged PLA-X material had an increase of 7.7% in the average maximal force compared to the new PLA-X samples. When comparing the two materials, the PLA samples had higher maximal force values, 6.2% for the new samples, and 7.3% for the aged samples. The DIC results showed that both the new PLA and PLA-X samples endured higher strain values at Points 1 and 2 than the aged ones, except for the aged PLA-X sample at Point 2, where the new sample had higher strain values. However, for the first 5 min of the experiment, both materials exhibited identical behavior, after which point significant differences started to occur for both materials, as well as at Points 1 and 2. A more profound comprehension of the biomechanical characteristics of both PLA and PLA-X material is essential to enhance the knowledge for potential biomedical applications. The DIC method was found to be a powerful tool for analyzing the deformation and failure behavior of samples and for complementing the traditional approach to material testing.
T2  - Micromachines
T1  - Influence of Aging on the Flexural Strength of PLA and PLA-X 3D-Printed Materials
IS  - 3
SP  - 395
VL  - 15
DO  - 10.3390/mi15030395
ER  - 

@article{
author = "Mitrović, Nenad and Golubović, Zorana and Mitrović, Aleksandra and Travica, Milan and Trajković, Isaak and Milošević, Miloš and Petrović, Aleksandar",
year = "2024",
abstract = "The three-point bending test is a valuable method for evaluating the mechanical properties of 3D-printed biomaterials, which can be used in various applications. The use of 3D printing in specimen preparation enables precise control over material composition and microstructure, facilitating the investigation of different printing parameters and advanced materials. The traditional approach to analyzing the mechanical properties of a material using a three-point bending test has the disadvantage that it provides only global information about the material’s behavior. This means that it does not provide detailed insight into the local strain distribution within the material. However, the 2D Digital Image Correlation (DIC) method offers additional insight, especially in terms of strain localization. DIC is an optical technique that measures full-field displacements and strains on the surface of a sample. PLA and enhanced PLA-X material were utilized to create three-point bending samples. The aim of this paper was to analyze and compare the influence of aging on the mechanical properties of PLA and enhanced PLA-X materials using three-point bending coupled with the DIC method. The results showed statistically significant differences between the PLA and PLA-X, for both the new and aged materials. The aged PLA samples had the highest average value of maximal force around 68 N, which was an increase of 8.8% compared to the new PLA samples. On the other hand, the aged PLA-X material had an increase of 7.7% in the average maximal force compared to the new PLA-X samples. When comparing the two materials, the PLA samples had higher maximal force values, 6.2% for the new samples, and 7.3% for the aged samples. The DIC results showed that both the new PLA and PLA-X samples endured higher strain values at Points 1 and 2 than the aged ones, except for the aged PLA-X sample at Point 2, where the new sample had higher strain values. However, for the first 5 min of the experiment, both materials exhibited identical behavior, after which point significant differences started to occur for both materials, as well as at Points 1 and 2. A more profound comprehension of the biomechanical characteristics of both PLA and PLA-X material is essential to enhance the knowledge for potential biomedical applications. The DIC method was found to be a powerful tool for analyzing the deformation and failure behavior of samples and for complementing the traditional approach to material testing.",
journal = "Micromachines",
title = "Influence of Aging on the Flexural Strength of PLA and PLA-X 3D-Printed Materials",
number = "3",
pages = "395",
volume = "15",
doi = "10.3390/mi15030395"
}

Mitrović, N., Golubović, Z., Mitrović, A., Travica, M., Trajković, I., Milošević, M.,& Petrović, A.. (2024). Influence of Aging on the Flexural Strength of PLA and PLA-X 3D-Printed Materials. in Micromachines, 15(3), 395.
https://doi.org/10.3390/mi15030395

Mitrović N, Golubović Z, Mitrović A, Travica M, Trajković I, Milošević M, Petrović A. Influence of Aging on the Flexural Strength of PLA and PLA-X 3D-Printed Materials. in Micromachines. 2024;15(3):395.
doi:10.3390/mi15030395 .

Mitrović, Nenad, Golubović, Zorana, Mitrović, Aleksandra, Travica, Milan, Trajković, Isaak, Milošević, Miloš, Petrović, Aleksandar, "Influence of Aging on the Flexural Strength of PLA and PLA-X 3D-Printed Materials" in Micromachines, 15, no. 3 (2024):395,
https://doi.org/10.3390/mi15030395 . .

TY  - JOUR
AU  - Aranđelović, Mihajlo
AU  - Đorđević, Branislav R.
AU  - Sedmak, Simon
AU  - Radu, Dorin
AU  - Petrović, Ana
AU  - Dikić, Stefan
AU  - Sedmak, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7776
AB  - Failure analysis of welded joint with multiple defects was performed taking into account the effect of all defects, not just a dominant one. Four cases of multiple defects in welded joint under the uniaxial tensile loading were investigated using extended Finite Element Method. Two-dimensional Finite Element Models were made according to the tensile specimens with initial crack located in a critical area of welded joint. For each multiple defects case, numerical simulation was performed with three initial crack depth. Engineering Critical Analysis was made using Failure Assessment Diagrams for each defect that was determined as critical for its welded joint case. Numerical simulation showed that the geometry of the most prominent one from a point of view of structural integrity. It was concluded that the vertical misalignment in combination with a secondary defect, had the most adverse effect which can lead to failure of welded structure.
PB  - Elsevier
T2  - Engineering Failure Analysis
T1  - Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis
SP  - 108176
VL  - 160
DO  - 10.1016/j.engfailanal.2024.108176
ER  - 

@article{
author = "Aranđelović, Mihajlo and Đorđević, Branislav R. and Sedmak, Simon and Radu, Dorin and Petrović, Ana and Dikić, Stefan and Sedmak, Aleksandar",
year = "2024",
abstract = "Failure analysis of welded joint with multiple defects was performed taking into account the effect of all defects, not just a dominant one. Four cases of multiple defects in welded joint under the uniaxial tensile loading were investigated using extended Finite Element Method. Two-dimensional Finite Element Models were made according to the tensile specimens with initial crack located in a critical area of welded joint. For each multiple defects case, numerical simulation was performed with three initial crack depth. Engineering Critical Analysis was made using Failure Assessment Diagrams for each defect that was determined as critical for its welded joint case. Numerical simulation showed that the geometry of the most prominent one from a point of view of structural integrity. It was concluded that the vertical misalignment in combination with a secondary defect, had the most adverse effect which can lead to failure of welded structure.",
publisher = "Elsevier",
journal = "Engineering Failure Analysis",
title = "Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis",
pages = "108176",
volume = "160",
doi = "10.1016/j.engfailanal.2024.108176"
}

Aranđelović, M., Đorđević, B. R., Sedmak, S., Radu, D., Petrović, A., Dikić, S.,& Sedmak, A.. (2024). Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis. in Engineering Failure Analysis
Elsevier., 160, 108176.
https://doi.org/10.1016/j.engfailanal.2024.108176

Aranđelović M, Đorđević BR, Sedmak S, Radu D, Petrović A, Dikić S, Sedmak A. Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis. in Engineering Failure Analysis. 2024;160:108176.
doi:10.1016/j.engfailanal.2024.108176 .

Aranđelović, Mihajlo, Đorđević, Branislav R., Sedmak, Simon, Radu, Dorin, Petrović, Ana, Dikić, Stefan, Sedmak, Aleksandar, "Failure analysis of welded joint with multiple defects by extended Finite Element Method and Engineering Critical Analysis" in Engineering Failure Analysis, 160 (2024):108176,
https://doi.org/10.1016/j.engfailanal.2024.108176 . .

TY  - JOUR
AU  - Alsharif, Abdulghder Mohahmed
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Mihajlović, Ivan
AU  - Brkić, Aleksandar
AU  - Papić, Neda
AU  - Perišić, Martina
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7746
AB  - Transport and mining companies are vulnerable to a variety of hazards, and this paper offers a novel conceptual framework for organisational resilience assessment at different organisational levels. It is based on a safety climate and performances assessment in companies in the transport and mining sector. The framework contains factor and reliability analysis and continues by applying the SMART method from the perspective of resilience corners: anticipate, monitor, react and learn. The highest resilience coefficients at all organisational levels are obtained regarding safety awareness, safety training and safety communication areas, while the lowest values are observed for risk assessment and the organisational environment. The obtained results indicate that the ‘monitor’ resilience corner must be improved at all organisational levels, employees trained and procedures changed, since employees do not sufficiently use experience from previous events. The very high values at all organisational levels of the coefficients regarding the ‘anticipate’ and ‘learn’ resilience corners indicate organisational adaptation to changes through corrective activities, rather than planned preventive ones. All hierarchical levels have good resilience indicators, except for middle management, which expressed an adequate resilience index, due to the lower ratings of the safety training, organisational commitment, risk assessment and management support areas.
PB  - Taylor & Francis
T2  - Civil Engineering and Environmental Systems
T1  - The safety climate, hierarchical levels and resilience assessment in transport and mining companies
DO  - 10.1080/10286608.2024.2313753
ER  - 

@article{
author = "Alsharif, Abdulghder Mohahmed and Spasojević Brkić, Vesna and Misita, Mirjana and Mihajlović, Ivan and Brkić, Aleksandar and Papić, Neda and Perišić, Martina",
year = "2024",
abstract = "Transport and mining companies are vulnerable to a variety of hazards, and this paper offers a novel conceptual framework for organisational resilience assessment at different organisational levels. It is based on a safety climate and performances assessment in companies in the transport and mining sector. The framework contains factor and reliability analysis and continues by applying the SMART method from the perspective of resilience corners: anticipate, monitor, react and learn. The highest resilience coefficients at all organisational levels are obtained regarding safety awareness, safety training and safety communication areas, while the lowest values are observed for risk assessment and the organisational environment. The obtained results indicate that the ‘monitor’ resilience corner must be improved at all organisational levels, employees trained and procedures changed, since employees do not sufficiently use experience from previous events. The very high values at all organisational levels of the coefficients regarding the ‘anticipate’ and ‘learn’ resilience corners indicate organisational adaptation to changes through corrective activities, rather than planned preventive ones. All hierarchical levels have good resilience indicators, except for middle management, which expressed an adequate resilience index, due to the lower ratings of the safety training, organisational commitment, risk assessment and management support areas.",
publisher = "Taylor & Francis",
journal = "Civil Engineering and Environmental Systems",
title = "The safety climate, hierarchical levels and resilience assessment in transport and mining companies",
doi = "10.1080/10286608.2024.2313753"
}

Alsharif, A. M., Spasojević Brkić, V., Misita, M., Mihajlović, I., Brkić, A., Papić, N.,& Perišić, M.. (2024). The safety climate, hierarchical levels and resilience assessment in transport and mining companies. in Civil Engineering and Environmental Systems
Taylor & Francis..
https://doi.org/10.1080/10286608.2024.2313753

Alsharif AM, Spasojević Brkić V, Misita M, Mihajlović I, Brkić A, Papić N, Perišić M. The safety climate, hierarchical levels and resilience assessment in transport and mining companies. in Civil Engineering and Environmental Systems. 2024;.
doi:10.1080/10286608.2024.2313753 .

Alsharif, Abdulghder Mohahmed, Spasojević Brkić, Vesna, Misita, Mirjana, Mihajlović, Ivan, Brkić, Aleksandar, Papić, Neda, Perišić, Martina, "The safety climate, hierarchical levels and resilience assessment in transport and mining companies" in Civil Engineering and Environmental Systems (2024),
https://doi.org/10.1080/10286608.2024.2313753 . .

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  - Kosanić, Nenad
AU  - Marolt, Jakob
AU  - Zrnić, Nenad
AU  - Lerher, Tone
PY  - 2024
UR  - https://www.tandfonline.com/doi/full/10.1080/00207543.2023.2221750
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7773
AB  - The paper presents an analytical model for travel time evaluation in double-deep, triple-deep, quadruple-deep and fivefold-deep tier-captive shuttle-based storage and retrieval system (SBS/RS). Under the assumption of the deepest location rule for the storage process and the nearest neighbour rule for the retrieval process, the expressions for single-command and dual-command cycle times of the shuttle vehicle and elevator are developed, from which the SBS/RS performance can be estimated. The model based on the probability theory enables the evaluation of all individual times that make up the cycle times and assessment of the average number of totes relocated during a retrieval process. Special attention is devoted to the modelling of the relocation of totes which block access to the requested tote during the retrieval process. The validity of the analytical model is examined via the developed simulation model. The given case study shows that the proposed analytical travel time model results match the results of the simulation model. The presented modelling strategy could be applied to bigger system racking depths following the same modelling logic.
PB  - Taylor and Francis Ltd.
T2  - International Journal of Production Research
T1  - Travel time model for multiple-deep shuttle-based storage and retrieval systems
EP  - 2639
IS  - 7
SP  - 2606
VL  - 62
DO  - 10.1080/00207543.2023.2221750
ER  - 

@article{
author = "Kosanić, Nenad and Marolt, Jakob and Zrnić, Nenad and Lerher, Tone",
year = "2024",
abstract = "The paper presents an analytical model for travel time evaluation in double-deep, triple-deep, quadruple-deep and fivefold-deep tier-captive shuttle-based storage and retrieval system (SBS/RS). Under the assumption of the deepest location rule for the storage process and the nearest neighbour rule for the retrieval process, the expressions for single-command and dual-command cycle times of the shuttle vehicle and elevator are developed, from which the SBS/RS performance can be estimated. The model based on the probability theory enables the evaluation of all individual times that make up the cycle times and assessment of the average number of totes relocated during a retrieval process. Special attention is devoted to the modelling of the relocation of totes which block access to the requested tote during the retrieval process. The validity of the analytical model is examined via the developed simulation model. The given case study shows that the proposed analytical travel time model results match the results of the simulation model. The presented modelling strategy could be applied to bigger system racking depths following the same modelling logic.",
publisher = "Taylor and Francis Ltd.",
journal = "International Journal of Production Research",
title = "Travel time model for multiple-deep shuttle-based storage and retrieval systems",
pages = "2639-2606",
number = "7",
volume = "62",
doi = "10.1080/00207543.2023.2221750"
}

Kosanić, N., Marolt, J., Zrnić, N.,& Lerher, T.. (2024). Travel time model for multiple-deep shuttle-based storage and retrieval systems. in International Journal of Production Research
Taylor and Francis Ltd.., 62(7), 2606-2639.
https://doi.org/10.1080/00207543.2023.2221750

Kosanić N, Marolt J, Zrnić N, Lerher T. Travel time model for multiple-deep shuttle-based storage and retrieval systems. in International Journal of Production Research. 2024;62(7):2606-2639.
doi:10.1080/00207543.2023.2221750 .

Kosanić, Nenad, Marolt, Jakob, Zrnić, Nenad, Lerher, Tone, "Travel time model for multiple-deep shuttle-based storage and retrieval systems" in International Journal of Production Research, 62, no. 7 (2024):2606-2639,
https://doi.org/10.1080/00207543.2023.2221750 . .

TY  - PAT
AU  - Tanasković, Jovan
AU  - Vasiljević, Katarina
AU  - Golubović, Zorana
AU  - Stojanović, Jagoš
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7759
AB  - Pronalazak u širem smislu pripada uređajima za rukovanje i transport, a u užem smislu pronalazak se odnosi na uređaje za prihvatanje tereta koji se koriste na uređajima za rukovanje, podizanje i interni transport aluminijumskih elemenata, podsklopova i sklopova nosećih struktura različitih vrsta šinskih vozila, koji se koriste u industriji šinskih vozila.
PB  - Zavod za intelektualnu svojinu, Beograd, Republika Srbija
T2  - МП-2023/0061, Reg. No.: 1803 U1, Br. reš.: 2024/168-МП-2023/0061 од 12.01.2024., Datum objavljivanja i broj Glasnika intelektualne svojine: Br. 1/2024 od 31.01.2024.
T1  - Specijalni alat za interni transport strukturnih elemenata šinskih vozila - SPECIAL TOOL FOR INTERNAL TRANSPORT OF STRUCTURAL ELEMENTS OF RAIL VEHICLES
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7759
ER  - 

@misc{
author = "Tanasković, Jovan and Vasiljević, Katarina and Golubović, Zorana and Stojanović, Jagoš",
year = "2024",
abstract = "Pronalazak u širem smislu pripada uređajima za rukovanje i transport, a u užem smislu pronalazak se odnosi na uređaje za prihvatanje tereta koji se koriste na uređajima za rukovanje, podizanje i interni transport aluminijumskih elemenata, podsklopova i sklopova nosećih struktura različitih vrsta šinskih vozila, koji se koriste u industriji šinskih vozila.",
publisher = "Zavod za intelektualnu svojinu, Beograd, Republika Srbija",
journal = "МП-2023/0061, Reg. No.: 1803 U1, Br. reš.: 2024/168-МП-2023/0061 од 12.01.2024., Datum objavljivanja i broj Glasnika intelektualne svojine: Br. 1/2024 od 31.01.2024.",
title = "Specijalni alat za interni transport strukturnih elemenata šinskih vozila - SPECIAL TOOL FOR INTERNAL TRANSPORT OF STRUCTURAL ELEMENTS OF RAIL VEHICLES",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7759"
}

Tanasković, J., Vasiljević, K., Golubović, Z.,& Stojanović, J.. (2024). Specijalni alat za interni transport strukturnih elemenata šinskih vozila - SPECIAL TOOL FOR INTERNAL TRANSPORT OF STRUCTURAL ELEMENTS OF RAIL VEHICLES. in МП-2023/0061, Reg. No.: 1803 U1, Br. reš.: 2024/168-МП-2023/0061 од 12.01.2024., Datum objavljivanja i broj Glasnika intelektualne svojine: Br. 1/2024 od 31.01.2024.
Zavod za intelektualnu svojinu, Beograd, Republika Srbija..
https://hdl.handle.net/21.15107/rcub_machinery_7759

Tanasković J, Vasiljević K, Golubović Z, Stojanović J. Specijalni alat za interni transport strukturnih elemenata šinskih vozila - SPECIAL TOOL FOR INTERNAL TRANSPORT OF STRUCTURAL ELEMENTS OF RAIL VEHICLES. in МП-2023/0061, Reg. No.: 1803 U1, Br. reš.: 2024/168-МП-2023/0061 од 12.01.2024., Datum objavljivanja i broj Glasnika intelektualne svojine: Br. 1/2024 od 31.01.2024.. 2024;.
https://hdl.handle.net/21.15107/rcub_machinery_7759 .

Tanasković, Jovan, Vasiljević, Katarina, Golubović, Zorana, Stojanović, Jagoš, "Specijalni alat za interni transport strukturnih elemenata šinskih vozila - SPECIAL TOOL FOR INTERNAL TRANSPORT OF STRUCTURAL ELEMENTS OF RAIL VEHICLES" in МП-2023/0061, Reg. No.: 1803 U1, Br. reš.: 2024/168-МП-2023/0061 од 12.01.2024., Datum objavljivanja i broj Glasnika intelektualne svojine: Br. 1/2024 od 31.01.2024. (2024),
https://hdl.handle.net/21.15107/rcub_machinery_7759 .

TY  - JOUR
AU  - Đurić, Slavko
AU  - Aranđelović, Ivan
AU  - Milotić, Milan
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7744
AB  - It is known that Fourier’s heat equation, which is parabolic, implies an infinite
velocity propagation, or, in other words, that the mechanism of heat
conduction is established instantaneously under all conditions. This is unacceptable
on physical grounds in spite of the fact that Fourier’s law agrees well
with experiment. However, discrepancies are likely to occur when extremely
short distances or extremely short time intervals are considered, as they must
in some modern problems of aero-thermodynamics. Cattaneo and independently
Vernotte proved that such process can be described by Heaviside’s telegraph
equation. This paper shows that this fact can be derived using calculus of
variations, by application of the Euler-Lagrange equation. So, we proved that
the equation of heat conduction with finite velocity propagation of the thermal
disturbance can be obtained as a solution to one variational problem
PB  - Scientific Research Publishing
T2  - Journal of Applied Mathematics and Physics
T1  - Variational Approach to Heat Conduction Modeling
EP  - 248
IS  - 1
SP  - 234
VL  - 12
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7744
ER  - 

@article{
author = "Đurić, Slavko and Aranđelović, Ivan and Milotić, Milan",
year = "2024",
abstract = "It is known that Fourier’s heat equation, which is parabolic, implies an infinite
velocity propagation, or, in other words, that the mechanism of heat
conduction is established instantaneously under all conditions. This is unacceptable
on physical grounds in spite of the fact that Fourier’s law agrees well
with experiment. However, discrepancies are likely to occur when extremely
short distances or extremely short time intervals are considered, as they must
in some modern problems of aero-thermodynamics. Cattaneo and independently
Vernotte proved that such process can be described by Heaviside’s telegraph
equation. This paper shows that this fact can be derived using calculus of
variations, by application of the Euler-Lagrange equation. So, we proved that
the equation of heat conduction with finite velocity propagation of the thermal
disturbance can be obtained as a solution to one variational problem",
publisher = "Scientific Research Publishing",
journal = "Journal of Applied Mathematics and Physics",
title = "Variational Approach to Heat Conduction Modeling",
pages = "248-234",
number = "1",
volume = "12",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7744"
}

Đurić, S., Aranđelović, I.,& Milotić, M.. (2024). Variational Approach to Heat Conduction Modeling. in Journal of Applied Mathematics and Physics
Scientific Research Publishing., 12(1), 234-248.
https://hdl.handle.net/21.15107/rcub_machinery_7744

Đurić S, Aranđelović I, Milotić M. Variational Approach to Heat Conduction Modeling. in Journal of Applied Mathematics and Physics. 2024;12(1):234-248.
https://hdl.handle.net/21.15107/rcub_machinery_7744 .

Đurić, Slavko, Aranđelović, Ivan, Milotić, Milan, "Variational Approach to Heat Conduction Modeling" in Journal of Applied Mathematics and Physics, 12, no. 1 (2024):234-248,
https://hdl.handle.net/21.15107/rcub_machinery_7744 .

TY  - JOUR
AU  - Fermo, Luisa
AU  - Reichel, Lothar
AU  - Rodriguez, Giuseppe
AU  - Spalević, Miodrag
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7357
PB  - Elsevier
T2  - Applied Mathematics and Computation
T1  - Averaged Nystr\" om  interpolants for the solution of Fredholm integral equations of the second kind
DO  - 10.1016/j.amc.2023.128482
ER  - 

@article{
author = "Fermo, Luisa and Reichel, Lothar and Rodriguez, Giuseppe and Spalević, Miodrag",
year = "2024",
publisher = "Elsevier",
journal = "Applied Mathematics and Computation",
title = "Averaged Nystr\" om  interpolants for the solution of Fredholm integral equations of the second kind",
doi = "10.1016/j.amc.2023.128482"
}

Fermo, L., Reichel, L., Rodriguez, G.,& Spalević, M.. (2024). Averaged Nystr\" om  interpolants for the solution of Fredholm integral equations of the second kind. in Applied Mathematics and Computation
Elsevier..
https://doi.org/10.1016/j.amc.2023.128482

Fermo L, Reichel L, Rodriguez G, Spalević M. Averaged Nystr\" om  interpolants for the solution of Fredholm integral equations of the second kind. in Applied Mathematics and Computation. 2024;.
doi:10.1016/j.amc.2023.128482 .

Fermo, Luisa, Reichel, Lothar, Rodriguez, Giuseppe, Spalević, Miodrag, "Averaged Nystr\" om  interpolants for the solution of Fredholm integral equations of the second kind" in Applied Mathematics and Computation (2024),
https://doi.org/10.1016/j.amc.2023.128482 . .

TY  - JOUR
AU  - Đukić, Dušan
AU  - Mutavdžić Đukić, Rada
AU  - Reichel, Lothar
AU  - Spalević, Miodrag
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7068
AB  - Optimal averaged Gauss quadrature rules provide estimates for the quadrature error in Gauss rules, as well as estimates for the error incurred when approximating
matrix functionals of the form u
T
f (A)v with a large matrix A ∈ R
N×N by lowrank approximations that are obtained by applying a few steps of the symmetric or
nonsymmetric Lanczos processes to A; here u, v ∈ R
N
are vectors. The latter process
is used when the measure associated with the Gauss quadrature rule has support in
the complex plane. The symmetric Lanczos process yields a real tridiagonal matrix,
whose entries determine the recursion coefficients of the monic orthogonal polynomials
associated with the measure, while the nonsymmetric Lanczos process determines a
nonsymmetric tridiagonal matrix, whose entries are recursion coefficients for a pair of
sets of bi-orthogonal polynomials. Recently, it has been shown, by applying the results
of Peherstorfer, that optimal averaged Gauss quadrature rules, which are associated
with a nonnegative measure with support on the real axis, can be expressed as a
weighted sum of two quadrature rules. This decomposition allows faster evaluation of
optimal averaged Gauss quadrature rules than the previously available representation.
The present paper provides a new self-contained proof of this decomposition that
is based on linear algebra techniques. Moreover, these techniques are generalized to
determine a decomposition of the optimal averaged quadrature rules that are associated
with the tridiagonal matrices determined by the nonsymmetric Lanczos process. Also,
the splitting of complex symmetric tridiagonal matrices is discussed. The new splittings
allow faster evaluation of optimal averaged Gauss quadrature rules than the previously
available representations. Computational aspects are discussed.
PB  - Elsevier
T2  - Journal of Computational and Applied Mathematics
T1  - Decompositions of optimal averaged Gauss quadrature rules
IS  - Art.  115586
VL  - 438
DO  - 10.1016/j.cam.2023.115586
ER  - 

@article{
author = "Đukić, Dušan and Mutavdžić Đukić, Rada and Reichel, Lothar and Spalević, Miodrag",
year = "2024",
abstract = "Optimal averaged Gauss quadrature rules provide estimates for the quadrature error in Gauss rules, as well as estimates for the error incurred when approximating
matrix functionals of the form u
T
f (A)v with a large matrix A ∈ R
N×N by lowrank approximations that are obtained by applying a few steps of the symmetric or
nonsymmetric Lanczos processes to A; here u, v ∈ R
N
are vectors. The latter process
is used when the measure associated with the Gauss quadrature rule has support in
the complex plane. The symmetric Lanczos process yields a real tridiagonal matrix,
whose entries determine the recursion coefficients of the monic orthogonal polynomials
associated with the measure, while the nonsymmetric Lanczos process determines a
nonsymmetric tridiagonal matrix, whose entries are recursion coefficients for a pair of
sets of bi-orthogonal polynomials. Recently, it has been shown, by applying the results
of Peherstorfer, that optimal averaged Gauss quadrature rules, which are associated
with a nonnegative measure with support on the real axis, can be expressed as a
weighted sum of two quadrature rules. This decomposition allows faster evaluation of
optimal averaged Gauss quadrature rules than the previously available representation.
The present paper provides a new self-contained proof of this decomposition that
is based on linear algebra techniques. Moreover, these techniques are generalized to
determine a decomposition of the optimal averaged quadrature rules that are associated
with the tridiagonal matrices determined by the nonsymmetric Lanczos process. Also,
the splitting of complex symmetric tridiagonal matrices is discussed. The new splittings
allow faster evaluation of optimal averaged Gauss quadrature rules than the previously
available representations. Computational aspects are discussed.",
publisher = "Elsevier",
journal = "Journal of Computational and Applied Mathematics",
title = "Decompositions of optimal averaged Gauss quadrature rules",
number = "Art.  115586",
volume = "438",
doi = "10.1016/j.cam.2023.115586"
}

Đukić, D., Mutavdžić Đukić, R., Reichel, L.,& Spalević, M.. (2024). Decompositions of optimal averaged Gauss quadrature rules. in Journal of Computational and Applied Mathematics
Elsevier., 438(Art.  115586).
https://doi.org/10.1016/j.cam.2023.115586

Đukić D, Mutavdžić Đukić R, Reichel L, Spalević M. Decompositions of optimal averaged Gauss quadrature rules. in Journal of Computational and Applied Mathematics. 2024;438(Art.  115586).
doi:10.1016/j.cam.2023.115586 .

Đukić, Dušan, Mutavdžić Đukić, Rada, Reichel, Lothar, Spalević, Miodrag, "Decompositions of optimal averaged Gauss quadrature rules" in Journal of Computational and Applied Mathematics, 438, no. Art.  115586 (2024),
https://doi.org/10.1016/j.cam.2023.115586 . .

TY  - JOUR
AU  - Reichel, Lothar
AU  - Spalević, Miodrag
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7067
AB  - We describe numerical methods for the construction of interpolatory quadrature rules of Radau and Lobatto types. In particular, we are interested in deriving efficient algorithms for computing optimal averaged Gauss–Radau and Gauss–Lobatto type javascript:undefined;quadrature rules. These averaged rules allow us to estimate the quadrature error in Gauss–Radau and Gauss–Lobatto quadrature rules. This is important since the latter rules have higher algebraic degree of exactness than the corresponding Gauss rules, and this makes it possible to construct averaged quadrature rules of higher algebraic degree of exactness than the corresponding “standard” averaged Gauss rules available in the literature.
PB  - Elsevier
T2  - Journal of Computational and Applied Mathematics
T1  - Radau-  and Lobatto-type averaged Gauss rules
IS  - Art  115477
VL  - 437
DO  - 10.1016/j.cam.2023.115475
ER  - 

@article{
author = "Reichel, Lothar and Spalević, Miodrag",
year = "2024",
abstract = "We describe numerical methods for the construction of interpolatory quadrature rules of Radau and Lobatto types. In particular, we are interested in deriving efficient algorithms for computing optimal averaged Gauss–Radau and Gauss–Lobatto type javascript:undefined;quadrature rules. These averaged rules allow us to estimate the quadrature error in Gauss–Radau and Gauss–Lobatto quadrature rules. This is important since the latter rules have higher algebraic degree of exactness than the corresponding Gauss rules, and this makes it possible to construct averaged quadrature rules of higher algebraic degree of exactness than the corresponding “standard” averaged Gauss rules available in the literature.",
publisher = "Elsevier",
journal = "Journal of Computational and Applied Mathematics",
title = "Radau-  and Lobatto-type averaged Gauss rules",
number = "Art  115477",
volume = "437",
doi = "10.1016/j.cam.2023.115475"
}

Reichel, L.,& Spalević, M.. (2024). Radau-  and Lobatto-type averaged Gauss rules. in Journal of Computational and Applied Mathematics
Elsevier., 437(Art  115477).
https://doi.org/10.1016/j.cam.2023.115475

Reichel L, Spalević M. Radau-  and Lobatto-type averaged Gauss rules. in Journal of Computational and Applied Mathematics. 2024;437(Art  115477).
doi:10.1016/j.cam.2023.115475 .

Reichel, Lothar, Spalević, Miodrag, "Radau-  and Lobatto-type averaged Gauss rules" in Journal of Computational and Applied Mathematics, 437, no. Art  115477 (2024),
https://doi.org/10.1016/j.cam.2023.115475 . .

TY  - CONF
AU  - Tasić, Nevena
AU  - Ortopan, Mateja
AU  - Simonović, Vojislav
AU  - Zlatanović, Ivan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7787
AB  - In Serbia, there are about 400.000 hectares of heavy mechanical composition soil and over 100.000 hectares of soil damaged in 
various ways. Every year, with different degradation processes, new 1.000 hectares of soil are damaged. From the aspect of physical 
properties, soil compaction represents a serious problem that leads to changes in physical-mechanical and water-air properties and is one of 
the main factors of soil degradation. This paper presents the technique of measuring soil compaction on experimental field of 1 hectare using 
a hand-held penetrometer on operating depth 25cm, along with the geographic location of the sampling points. The data obtained in this 
research, the method of collecting, processing and displaying that data suggested certain shortcomings of the application of this method for 
testing soil resistance, as well as the need for a procedure for measuring soil resistance using a continuous method.
PB  - Scientific-Technical Union of Mechanical Engineering  INDUSTRY 4.0
C3  - The11th International Scientific Congress AGRICULTURAL MACHINERY 2023
T1  - Measurement of vertical soil compaction after barley harvesting
EP  - 88
SP  - 86
VL  - 1/10
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7787
ER  - 

@conference{
author = "Tasić, Nevena and Ortopan, Mateja and Simonović, Vojislav and Zlatanović, Ivan",
year = "2023",
abstract = "In Serbia, there are about 400.000 hectares of heavy mechanical composition soil and over 100.000 hectares of soil damaged in 
various ways. Every year, with different degradation processes, new 1.000 hectares of soil are damaged. From the aspect of physical 
properties, soil compaction represents a serious problem that leads to changes in physical-mechanical and water-air properties and is one of 
the main factors of soil degradation. This paper presents the technique of measuring soil compaction on experimental field of 1 hectare using 
a hand-held penetrometer on operating depth 25cm, along with the geographic location of the sampling points. The data obtained in this 
research, the method of collecting, processing and displaying that data suggested certain shortcomings of the application of this method for 
testing soil resistance, as well as the need for a procedure for measuring soil resistance using a continuous method.",
publisher = "Scientific-Technical Union of Mechanical Engineering  INDUSTRY 4.0",
journal = "The11th International Scientific Congress AGRICULTURAL MACHINERY 2023",
title = "Measurement of vertical soil compaction after barley harvesting",
pages = "88-86",
volume = "1/10",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7787"
}

Tasić, N., Ortopan, M., Simonović, V.,& Zlatanović, I.. (2023). Measurement of vertical soil compaction after barley harvesting. in The11th International Scientific Congress AGRICULTURAL MACHINERY 2023
Scientific-Technical Union of Mechanical Engineering  INDUSTRY 4.0., 1/10, 86-88.
https://hdl.handle.net/21.15107/rcub_machinery_7787

Tasić N, Ortopan M, Simonović V, Zlatanović I. Measurement of vertical soil compaction after barley harvesting. in The11th International Scientific Congress AGRICULTURAL MACHINERY 2023. 2023;1/10:86-88.
https://hdl.handle.net/21.15107/rcub_machinery_7787 .

Tasić, Nevena, Ortopan, Mateja, Simonović, Vojislav, Zlatanović, Ivan, "Measurement of vertical soil compaction after barley harvesting" in The11th International Scientific Congress AGRICULTURAL MACHINERY 2023, 1/10 (2023):86-88,
https://hdl.handle.net/21.15107/rcub_machinery_7787 .

TY  - CONF
AU  - Simonović, Vojislav
AU  - Korolija, Nenad
AU  - Milošević, Miloš
AU  - Zlatanović, Ivan
AU  - Šakota Rosić, Jovana
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7786
AB  - There are many physical and chemical properties of soil that can be measured and 
mapped. Such maps can be very important decision-making tools in precision agriculture. 
However, unlike yield maps and crop scouting maps, all other maps show a lower degree of 
reliability in terms of decision utility. Soil compaction is the most representative feature of the 
production plot from the domain of physical and chemical soil properties. This paper first presents 
an experiment designed to measure soil compaction, and then a mapping of the results in a 
commercial software. The test field with an area of one hectare was reduced to a control limit of 60 
meters in width and 120 meters in length to ensure the uniformity of speed and other parameters. 
The resolution of the draft force measurement as an indicator of soil compaction was 50 Hz. This 
resulted in the existence of missing data on the draft force map itself, because several draft force 
values were related to one spatial coordinate manifested as longitude and latitude. The paper 
further shows the procedure of data smoothing and generation of complete maps without missing 
spatial data.
C3  - The 6th International Symposium on Agricultural Engineering ISAE 2023
T1  - Case Of Study For Draft Force Map Smoothing In Precision Agriculture
EP  - 57
SP  - 52
VL  - 6
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7786
ER  - 

@conference{
author = "Simonović, Vojislav and Korolija, Nenad and Milošević, Miloš and Zlatanović, Ivan and Šakota Rosić, Jovana",
year = "2023",
abstract = "There are many physical and chemical properties of soil that can be measured and 
mapped. Such maps can be very important decision-making tools in precision agriculture. 
However, unlike yield maps and crop scouting maps, all other maps show a lower degree of 
reliability in terms of decision utility. Soil compaction is the most representative feature of the 
production plot from the domain of physical and chemical soil properties. This paper first presents 
an experiment designed to measure soil compaction, and then a mapping of the results in a 
commercial software. The test field with an area of one hectare was reduced to a control limit of 60 
meters in width and 120 meters in length to ensure the uniformity of speed and other parameters. 
The resolution of the draft force measurement as an indicator of soil compaction was 50 Hz. This 
resulted in the existence of missing data on the draft force map itself, because several draft force 
values were related to one spatial coordinate manifested as longitude and latitude. The paper 
further shows the procedure of data smoothing and generation of complete maps without missing 
spatial data.",
journal = "The 6th International Symposium on Agricultural Engineering ISAE 2023",
title = "Case Of Study For Draft Force Map Smoothing In Precision Agriculture",
pages = "57-52",
volume = "6",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7786"
}

Simonović, V., Korolija, N., Milošević, M., Zlatanović, I.,& Šakota Rosić, J.. (2023). Case Of Study For Draft Force Map Smoothing In Precision Agriculture. in The 6th International Symposium on Agricultural Engineering ISAE 2023, 6, 52-57.
https://hdl.handle.net/21.15107/rcub_machinery_7786

Simonović V, Korolija N, Milošević M, Zlatanović I, Šakota Rosić J. Case Of Study For Draft Force Map Smoothing In Precision Agriculture. in The 6th International Symposium on Agricultural Engineering ISAE 2023. 2023;6:52-57.
https://hdl.handle.net/21.15107/rcub_machinery_7786 .

Simonović, Vojislav, Korolija, Nenad, Milošević, Miloš, Zlatanović, Ivan, Šakota Rosić, Jovana, "Case Of Study For Draft Force Map Smoothing In Precision Agriculture" in The 6th International Symposium on Agricultural Engineering ISAE 2023, 6 (2023):52-57,
https://hdl.handle.net/21.15107/rcub_machinery_7786 .

TY  - CONF
AU  - Bojović, Božica
AU  - Golubović, Zorana
AU  - Jevtić, Ivana
AU  - Mišković, Žarko
AU  - Sedmak, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7418
AB  - Considering that additive manufacturing technology, has evolved significantly over the past few decades, understanding of materials mechanical properties became important part of researches with the goal of further improvement of production Among the seven different AM technologies, in this research is used digital light processing (DLP) 3D printing process with LCD projector. The thermoplastic polymer material acrylonitrile butadiene styrene (ABS) is a widely used material for 3D plastics printing, and in this study, it is chosen in the resin form. So far, this type of material has not been sufficiently studied, and the aim of this study was to determine the mechanical properties for two different specimens’ building orientations (45° and 90°). Specimen’s geometry is chosen according to the respective standards for mechanical testing’s. Because of the difficulties and warping which occur when printing the flat, thin and long specimens, orientation ‘on edge’, i.e., 90° is chosen, as well as the 45° orientation, for comparison. Tensile, three point bending and compression mechanical tests were performed and Matlab is used to create stress-strain curves. Additionally, microscopy is performed for more comprehensive insight of the behaviour of the ABS resin printed via DLP-LCD technology. Comparison of mechanical properties for two orientations leads to the overview of printing parameters which result in better mechanical properties regard to specific application. Better behaviour and compression mechanical properties are noticed in 90° orientation printed ABS resin specimens, compared to 45° ones, while flexure behaviour of ABS is the same regardless to building orientation.
C3  - ICPES 2023 39th International Conference on Production Engineering of Serbia
T1  - MECHANICAL PROPERTIES VARIATION DUE TO BUILDING ORIENTATION OF ABS RESIN MATERIAL
EP  - 71
SP  - 67
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7418
ER  - 

@conference{
author = "Bojović, Božica and Golubović, Zorana and Jevtić, Ivana and Mišković, Žarko and Sedmak, Aleksandar",
year = "2023",
abstract = "Considering that additive manufacturing technology, has evolved significantly over the past few decades, understanding of materials mechanical properties became important part of researches with the goal of further improvement of production Among the seven different AM technologies, in this research is used digital light processing (DLP) 3D printing process with LCD projector. The thermoplastic polymer material acrylonitrile butadiene styrene (ABS) is a widely used material for 3D plastics printing, and in this study, it is chosen in the resin form. So far, this type of material has not been sufficiently studied, and the aim of this study was to determine the mechanical properties for two different specimens’ building orientations (45° and 90°). Specimen’s geometry is chosen according to the respective standards for mechanical testing’s. Because of the difficulties and warping which occur when printing the flat, thin and long specimens, orientation ‘on edge’, i.e., 90° is chosen, as well as the 45° orientation, for comparison. Tensile, three point bending and compression mechanical tests were performed and Matlab is used to create stress-strain curves. Additionally, microscopy is performed for more comprehensive insight of the behaviour of the ABS resin printed via DLP-LCD technology. Comparison of mechanical properties for two orientations leads to the overview of printing parameters which result in better mechanical properties regard to specific application. Better behaviour and compression mechanical properties are noticed in 90° orientation printed ABS resin specimens, compared to 45° ones, while flexure behaviour of ABS is the same regardless to building orientation.",
journal = "ICPES 2023 39th International Conference on Production Engineering of Serbia",
title = "MECHANICAL PROPERTIES VARIATION DUE TO BUILDING ORIENTATION OF ABS RESIN MATERIAL",
pages = "71-67",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7418"
}

Bojović, B., Golubović, Z., Jevtić, I., Mišković, Ž.,& Sedmak, A.. (2023). MECHANICAL PROPERTIES VARIATION DUE TO BUILDING ORIENTATION OF ABS RESIN MATERIAL. in ICPES 2023 39th International Conference on Production Engineering of Serbia, 67-71.
https://hdl.handle.net/21.15107/rcub_machinery_7418

Bojović B, Golubović Z, Jevtić I, Mišković Ž, Sedmak A. MECHANICAL PROPERTIES VARIATION DUE TO BUILDING ORIENTATION OF ABS RESIN MATERIAL. in ICPES 2023 39th International Conference on Production Engineering of Serbia. 2023;:67-71.
https://hdl.handle.net/21.15107/rcub_machinery_7418 .

Bojović, Božica, Golubović, Zorana, Jevtić, Ivana, Mišković, Žarko, Sedmak, Aleksandar, "MECHANICAL PROPERTIES VARIATION DUE TO BUILDING ORIENTATION OF ABS RESIN MATERIAL" in ICPES 2023 39th International Conference on Production Engineering of Serbia (2023):67-71,
https://hdl.handle.net/21.15107/rcub_machinery_7418 .

TY  - CONF
AU  - Vesović, Mitra
AU  - Jovanović, Radiša
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6957
AB  - This paper provides a nonlinear technique that uses a fuzzy inference system and neural networks for the identification purposes of heat flow transfer in the chamber. Firstly, linear models are obtained by transfer functions with delay using Matlab identification tools for heat exchange.
Three different transfer functions are provided (for three sensors in different positions along the chamber), and after it has been concluded that the second model has the smallest error, it is tested using different input. In this case, the linear model failed to represent the behaviour of the system precisely, making the error more than 1.5 C in the steady state. This was expected because linear models are trustworthy only around certain operating ranges. In order to make the new model, which will be unique and valid in the whole state space, another identification method using an adaptive neuro-fuzzy inference system (ANFIS) was presented. Furthermore, for the best performance, the ANFIS architecture was found using one of the most famous population-based optimizations: the genetic evolutionary algorithm. With two inputs and 70 parameters found by optimization (40 premises and 30 consequent) ANFIS greatly outperforms standard identification technique in terms of the mean square error. This nonlinear model was also tested on the different input, which was not used in the training process, and it was concluded that the nonlinear model identifies the real object with a neglectable error, which is 45 times smaller than the linear one.
PB  - Belgrade : Singidunum University
C3  - Sinteza 2023 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia, 2023, pp. 44-51
T1  - Heat Flow Process Identification Using ANFIS-GA Model
EP  - 51
SP  - 44
VL  - Computer Science and Artificial Intelligence Session
DO  - 10.15308/Sinteza-2023-44-51
ER  - 

@conference{
author = "Vesović, Mitra and Jovanović, Radiša",
year = "2023",
abstract = "This paper provides a nonlinear technique that uses a fuzzy inference system and neural networks for the identification purposes of heat flow transfer in the chamber. Firstly, linear models are obtained by transfer functions with delay using Matlab identification tools for heat exchange.
Three different transfer functions are provided (for three sensors in different positions along the chamber), and after it has been concluded that the second model has the smallest error, it is tested using different input. In this case, the linear model failed to represent the behaviour of the system precisely, making the error more than 1.5 C in the steady state. This was expected because linear models are trustworthy only around certain operating ranges. In order to make the new model, which will be unique and valid in the whole state space, another identification method using an adaptive neuro-fuzzy inference system (ANFIS) was presented. Furthermore, for the best performance, the ANFIS architecture was found using one of the most famous population-based optimizations: the genetic evolutionary algorithm. With two inputs and 70 parameters found by optimization (40 premises and 30 consequent) ANFIS greatly outperforms standard identification technique in terms of the mean square error. This nonlinear model was also tested on the different input, which was not used in the training process, and it was concluded that the nonlinear model identifies the real object with a neglectable error, which is 45 times smaller than the linear one.",
publisher = "Belgrade : Singidunum University",
journal = "Sinteza 2023 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia, 2023, pp. 44-51",
title = "Heat Flow Process Identification Using ANFIS-GA Model",
pages = "51-44",
volume = "Computer Science and Artificial Intelligence Session",
doi = "10.15308/Sinteza-2023-44-51"
}

Vesović, M.,& Jovanović, R.. (2023). Heat Flow Process Identification Using ANFIS-GA Model. in Sinteza 2023 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia, 2023, pp. 44-51
Belgrade : Singidunum University., Computer Science and Artificial Intelligence Session, 44-51.
https://doi.org/10.15308/Sinteza-2023-44-51

Vesović M, Jovanović R. Heat Flow Process Identification Using ANFIS-GA Model. in Sinteza 2023 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia, 2023, pp. 44-51. 2023;Computer Science and Artificial Intelligence Session:44-51.
doi:10.15308/Sinteza-2023-44-51 .

Vesović, Mitra, Jovanović, Radiša, "Heat Flow Process Identification Using ANFIS-GA Model" in Sinteza 2023 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia, 2023, pp. 44-51, Computer Science and Artificial Intelligence Session (2023):44-51,
https://doi.org/10.15308/Sinteza-2023-44-51 . .

TY  - CONF
AU  - Đukić, Dušan
AU  - Mutavdžić Đukić, Rada
AU  - Reichel, Lothar
AU  - Spalević, Miodrag
PY  - 2023
UR  - http://www.ic-mrs.org/
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7662
AB  - The averaged and optimal averaged quadrature rules provide a convenient method of approximating the error in the Gauss quadrature. However, they are fully applicable only if their nodes are internal. We discuss two approaches to determine averaged quadrature rules with internal nodes: (i) truncating the Jacobi matrix associated with the optimal averaged rule, and (ii) weighting the optimal averaged quadrature rule. A survey of our results on internality of averaged Gaussian quadrature rules will be presented.
C3  - 6TH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND RELATED SCIENCES  BOOK OF ABSTRACTS
T1  - Internality of Averaged Gaussian Quadrature Rules
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7662
ER  - 

@conference{
author = "Đukić, Dušan and Mutavdžić Đukić, Rada and Reichel, Lothar and Spalević, Miodrag",
year = "2023",
abstract = "The averaged and optimal averaged quadrature rules provide a convenient method of approximating the error in the Gauss quadrature. However, they are fully applicable only if their nodes are internal. We discuss two approaches to determine averaged quadrature rules with internal nodes: (i) truncating the Jacobi matrix associated with the optimal averaged rule, and (ii) weighting the optimal averaged quadrature rule. A survey of our results on internality of averaged Gaussian quadrature rules will be presented.",
journal = "6TH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND RELATED SCIENCES  BOOK OF ABSTRACTS",
title = "Internality of Averaged Gaussian Quadrature Rules",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7662"
}

Đukić, D., Mutavdžić Đukić, R., Reichel, L.,& Spalević, M.. (2023). Internality of Averaged Gaussian Quadrature Rules. in 6TH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND RELATED SCIENCES  BOOK OF ABSTRACTS.
https://hdl.handle.net/21.15107/rcub_machinery_7662

Đukić D, Mutavdžić Đukić R, Reichel L, Spalević M. Internality of Averaged Gaussian Quadrature Rules. in 6TH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND RELATED SCIENCES  BOOK OF ABSTRACTS. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7662 .

Đukić, Dušan, Mutavdžić Đukić, Rada, Reichel, Lothar, Spalević, Miodrag, "Internality of Averaged Gaussian Quadrature Rules" in 6TH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND RELATED SCIENCES  BOOK OF ABSTRACTS (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7662 .

TY  - CONF
AU  - Đukić, Dušan
AU  - Mutavdžić Đukić, Rada
AU  - Reichel, Lothar
AU  - Spalević, Miodrag
PY  - 2023
UR  - https://imi.pmf.kg.ac.rs/aaa2023/
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7216
PB  - Prirodno-matematički fakultet Kragujevac
C3  - International Mathematical Conference Analysis, Approximations and Applications (AAA2023), Vrnjačka Banja
T1  - On Internality of Generalized Averaged Gaussian Quadrature Rules and Their Truncations
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7216
ER  - 

@conference{
author = "Đukić, Dušan and Mutavdžić Đukić, Rada and Reichel, Lothar and Spalević, Miodrag",
year = "2023",
publisher = "Prirodno-matematički fakultet Kragujevac",
journal = "International Mathematical Conference Analysis, Approximations and Applications (AAA2023), Vrnjačka Banja",
title = "On Internality of Generalized Averaged Gaussian Quadrature Rules and Their Truncations",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7216"
}

Đukić, D., Mutavdžić Đukić, R., Reichel, L.,& Spalević, M.. (2023). On Internality of Generalized Averaged Gaussian Quadrature Rules and Their Truncations. in International Mathematical Conference Analysis, Approximations and Applications (AAA2023), Vrnjačka Banja
Prirodno-matematički fakultet Kragujevac..
https://hdl.handle.net/21.15107/rcub_machinery_7216

Đukić D, Mutavdžić Đukić R, Reichel L, Spalević M. On Internality of Generalized Averaged Gaussian Quadrature Rules and Their Truncations. in International Mathematical Conference Analysis, Approximations and Applications (AAA2023), Vrnjačka Banja. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7216 .

Đukić, Dušan, Mutavdžić Đukić, Rada, Reichel, Lothar, Spalević, Miodrag, "On Internality of Generalized Averaged Gaussian Quadrature Rules and Their Truncations" in International Mathematical Conference Analysis, Approximations and Applications (AAA2023), Vrnjačka Banja (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7216 .

TY  - CONF
AU  - Vorkapić, Nikola
AU  - Kokotović, Branko
AU  - Živanović, Saša
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7005
AB  - This paper presents the results of the research into the applicability of the features derived by statistical analysis of signals from the machining process in the recognition of occurrence and evolving of chatter vibration. Selected set of statistical features were discussed, 3 of them in the time domain, an one in the frequency domain. Effects of these signal features were discussed through analysis of the results of two experiments with machining. It was shown that standard deviation and the skewness of the force or acceleration signal have some desirable properties in recognition of the moment when chatter vibrations occur.
PB  - Novi Sad : Faculty of Technical Sciences
C3  - 39th International Conference on Production Engineering of Serbia ICPES 2023, 26-27. October 2023, Novi Sad
T1  - Comparison of signal features from time and frequency domain for chatter detection
EP  - 47
SP  - 42
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7005
ER  - 

@conference{
author = "Vorkapić, Nikola and Kokotović, Branko and Živanović, Saša",
year = "2023",
abstract = "This paper presents the results of the research into the applicability of the features derived by statistical analysis of signals from the machining process in the recognition of occurrence and evolving of chatter vibration. Selected set of statistical features were discussed, 3 of them in the time domain, an one in the frequency domain. Effects of these signal features were discussed through analysis of the results of two experiments with machining. It was shown that standard deviation and the skewness of the force or acceleration signal have some desirable properties in recognition of the moment when chatter vibrations occur.",
publisher = "Novi Sad : Faculty of Technical Sciences",
journal = "39th International Conference on Production Engineering of Serbia ICPES 2023, 26-27. October 2023, Novi Sad",
title = "Comparison of signal features from time and frequency domain for chatter detection",
pages = "47-42",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7005"
}

Vorkapić, N., Kokotović, B.,& Živanović, S.. (2023). Comparison of signal features from time and frequency domain for chatter detection. in 39th International Conference on Production Engineering of Serbia ICPES 2023, 26-27. October 2023, Novi Sad
Novi Sad : Faculty of Technical Sciences., 42-47.
https://hdl.handle.net/21.15107/rcub_machinery_7005

Vorkapić N, Kokotović B, Živanović S. Comparison of signal features from time and frequency domain for chatter detection. in 39th International Conference on Production Engineering of Serbia ICPES 2023, 26-27. October 2023, Novi Sad. 2023;:42-47.
https://hdl.handle.net/21.15107/rcub_machinery_7005 .

Vorkapić, Nikola, Kokotović, Branko, Živanović, Saša, "Comparison of signal features from time and frequency domain for chatter detection" in 39th International Conference on Production Engineering of Serbia ICPES 2023, 26-27. October 2023, Novi Sad (2023):42-47,
https://hdl.handle.net/21.15107/rcub_machinery_7005 .

TY  - CONF
AU  - Pešić, Jelica
AU  - Božić, Ivan
AU  - Ristić, Bogdan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7256
AB  - U prioritetne ciljeve revitalizacija hidroelektrana nakon njihove višedecenijske
eksploatacije svrstavaju se poboljšanje karakteristika hidrauličnih turbina i modernizacija
hidromašinske opreme i pomoćnih sistema. Poboljšanje energetske efikasnosti zajedno sa
povećanjem stepena operativnosti, raspoloživosti i pouzdanosti omogućuju novi eksploatacioni vek
hidroagregata. Pristupi i jasno definisane smernice revitalizacije hidrauličnih turbina proizilaze iz
odluka koje se donose na osnovu pređašnjih iskustva i relevantnih standarda, a nakon utvrđivanja
pouzdanih podataka o postojećem stanju opreme i energetskih karakteristika. U ovom radu je na
primeru HE Bistrica, koja je u predrevitalizacionom statusu, izvršena detaljna analiza energetskih
karakteristika postojeće Fransis turbine primenom savremenih numeričkih simulacija. Numerički
rezultati su validirani pomoću postojećih eksperimentalnih rezultata koji su dobijeni terenskim
ispitivanjima na prototipu. Prikazani rezultati predstavljaju osnovu za dalje definisanje mogućih
modifikacija ili zamene pojedinih komponenata u strujnom prostoru postojeće hidraulične turbine.
PB  - Society of Thermal Engineers of Serbia
C3  - INTERNATIONAL CONFERENCE POWER PLANTS 2023
T1  - NUMERICAL ANALYSIS OF THE EXISTING FRANCIS TURBINE ENERGY CHARACTERISTICS AT THE HPP BISTRICA [НУМЕРИЧКА АНАЛИЗА ЕНЕРГЕТСКИХ КАРАКТЕРИСТИКА ПОСТОЈЕЋЕ ФРАНСИС ТУРБИНЕ У ХЕ БИСТРИЦА]
EP  - 844
SP  - 836
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7256
ER  - 

@conference{
author = "Pešić, Jelica and Božić, Ivan and Ristić, Bogdan",
year = "2023",
abstract = "U prioritetne ciljeve revitalizacija hidroelektrana nakon njihove višedecenijske
eksploatacije svrstavaju se poboljšanje karakteristika hidrauličnih turbina i modernizacija
hidromašinske opreme i pomoćnih sistema. Poboljšanje energetske efikasnosti zajedno sa
povećanjem stepena operativnosti, raspoloživosti i pouzdanosti omogućuju novi eksploatacioni vek
hidroagregata. Pristupi i jasno definisane smernice revitalizacije hidrauličnih turbina proizilaze iz
odluka koje se donose na osnovu pređašnjih iskustva i relevantnih standarda, a nakon utvrđivanja
pouzdanih podataka o postojećem stanju opreme i energetskih karakteristika. U ovom radu je na
primeru HE Bistrica, koja je u predrevitalizacionom statusu, izvršena detaljna analiza energetskih
karakteristika postojeće Fransis turbine primenom savremenih numeričkih simulacija. Numerički
rezultati su validirani pomoću postojećih eksperimentalnih rezultata koji su dobijeni terenskim
ispitivanjima na prototipu. Prikazani rezultati predstavljaju osnovu za dalje definisanje mogućih
modifikacija ili zamene pojedinih komponenata u strujnom prostoru postojeće hidraulične turbine.",
publisher = "Society of Thermal Engineers of Serbia",
journal = "INTERNATIONAL CONFERENCE POWER PLANTS 2023",
title = "NUMERICAL ANALYSIS OF THE EXISTING FRANCIS TURBINE ENERGY CHARACTERISTICS AT THE HPP BISTRICA [НУМЕРИЧКА АНАЛИЗА ЕНЕРГЕТСКИХ КАРАКТЕРИСТИКА ПОСТОЈЕЋЕ ФРАНСИС ТУРБИНЕ У ХЕ БИСТРИЦА]",
pages = "844-836",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7256"
}

Pešić, J., Božić, I.,& Ristić, B.. (2023). NUMERICAL ANALYSIS OF THE EXISTING FRANCIS TURBINE ENERGY CHARACTERISTICS AT THE HPP BISTRICA [НУМЕРИЧКА АНАЛИЗА ЕНЕРГЕТСКИХ КАРАКТЕРИСТИКА ПОСТОЈЕЋЕ ФРАНСИС ТУРБИНЕ У ХЕ БИСТРИЦА]. in INTERNATIONAL CONFERENCE POWER PLANTS 2023
Society of Thermal Engineers of Serbia., 836-844.
https://hdl.handle.net/21.15107/rcub_machinery_7256

Pešić J, Božić I, Ristić B. NUMERICAL ANALYSIS OF THE EXISTING FRANCIS TURBINE ENERGY CHARACTERISTICS AT THE HPP BISTRICA [НУМЕРИЧКА АНАЛИЗА ЕНЕРГЕТСКИХ КАРАКТЕРИСТИКА ПОСТОЈЕЋЕ ФРАНСИС ТУРБИНЕ У ХЕ БИСТРИЦА]. in INTERNATIONAL CONFERENCE POWER PLANTS 2023. 2023;:836-844.
https://hdl.handle.net/21.15107/rcub_machinery_7256 .

Pešić, Jelica, Božić, Ivan, Ristić, Bogdan, "NUMERICAL ANALYSIS OF THE EXISTING FRANCIS TURBINE ENERGY CHARACTERISTICS AT THE HPP BISTRICA [НУМЕРИЧКА АНАЛИЗА ЕНЕРГЕТСКИХ КАРАКТЕРИСТИКА ПОСТОЈЕЋЕ ФРАНСИС ТУРБИНЕ У ХЕ БИСТРИЦА]" in INTERNATIONAL CONFERENCE POWER PLANTS 2023 (2023):836-844,
https://hdl.handle.net/21.15107/rcub_machinery_7256 .

TY  - CONF
AU  - Arsić, Aleksandra
AU  - Flajs, Željko
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7288
AB  - A numerical analysis of welded connection between two steel structures is performed with the usage of the finite element approach. A frame stage‐like structure is placed between the main horizontal girders of the structure of the hall. A visual inspection of the frame revealed numerous irregularities of welds which brought demand for redesign and overall check. The emphasis in this paper is comparative calculation of initial and redesigned welded end‐joints, without imposing the optimal technical solution. It is used modern and particular finite element software for calculation of welded joints. The values of stresses in the welded joint as well in plates and members are lower than the permitted values for both models. However, the influence on the main structure is reduced with redesigned technical solution. The level of stresses is lower along with reduction of rotational stiffness of the joint. This can be considered as a relief to the main girders of the hall structure and should be a cost and a goal for supporting any additional structure.
PB  - University of Banja Luka Faculty of Mechanical Engineering
C3  - 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023
T1  - Finite element calculation of redesigned welded joint at support for frame stage‐like structure
EP  - 516
SP  - 511
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7288
ER  - 

@conference{
author = "Arsić, Aleksandra and Flajs, Željko and Gašić, Vlada and Zrnić, Nenad",
year = "2023",
abstract = "A numerical analysis of welded connection between two steel structures is performed with the usage of the finite element approach. A frame stage‐like structure is placed between the main horizontal girders of the structure of the hall. A visual inspection of the frame revealed numerous irregularities of welds which brought demand for redesign and overall check. The emphasis in this paper is comparative calculation of initial and redesigned welded end‐joints, without imposing the optimal technical solution. It is used modern and particular finite element software for calculation of welded joints. The values of stresses in the welded joint as well in plates and members are lower than the permitted values for both models. However, the influence on the main structure is reduced with redesigned technical solution. The level of stresses is lower along with reduction of rotational stiffness of the joint. This can be considered as a relief to the main girders of the hall structure and should be a cost and a goal for supporting any additional structure.",
publisher = "University of Banja Luka Faculty of Mechanical Engineering",
journal = "16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023",
title = "Finite element calculation of redesigned welded joint at support for frame stage‐like structure",
pages = "516-511",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7288"
}

Arsić, A., Flajs, Ž., Gašić, V.,& Zrnić, N.. (2023). Finite element calculation of redesigned welded joint at support for frame stage‐like structure. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023
University of Banja Luka Faculty of Mechanical Engineering., 511-516.
https://hdl.handle.net/21.15107/rcub_machinery_7288

Arsić A, Flajs Ž, Gašić V, Zrnić N. Finite element calculation of redesigned welded joint at support for frame stage‐like structure. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023. 2023;:511-516.
https://hdl.handle.net/21.15107/rcub_machinery_7288 .

Arsić, Aleksandra, Flajs, Željko, Gašić, Vlada, Zrnić, Nenad, "Finite element calculation of redesigned welded joint at support for frame stage‐like structure" in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023 (2023):511-516,
https://hdl.handle.net/21.15107/rcub_machinery_7288 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Arsić, Aleksandra
AU  - Zrnić, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7283
AB  - The paper deals with strength of load-carrying fillet welds with application of two different approaches. First one is calculation by classical/scholar approach while second one is devoted to finite element analysis. The classical approach is concerned with national and European engineering practice. The finite element approach includes the application of particular tool which preserves main recommendations from modern postulations in design of joints. The object of interest is welded beam-to-column joint with different structural elements and the stresses are obtained for two models. It is investigated correlation of results of weld stresses from both the approaches. Direct matching of results was neither expected nor found but basic correlation is revealed within the joint behaviour under loadings. Considering finite element approach as prevailing, its advantage is clearly shown throughout inclusion of local effects of plates. However, classical approach is essential for proper understanding of joint behaviour and should be always the first step in structural analysis. The usage of at least two different approaches is one way of improving safety checks in engineering and stands for purpose of validation or verification of design.
PB  - Faculty of Mechanical and Civil Engineering in Kraljevo
C3  - XI International Conference Heavy Machinery - HM 2023
T1  - Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach
EP  - A.8
SP  - A.1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7283
ER  - 

@conference{
author = "Gašić, Vlada and Arsić, Aleksandra and Zrnić, Nenad",
year = "2023",
abstract = "The paper deals with strength of load-carrying fillet welds with application of two different approaches. First one is calculation by classical/scholar approach while second one is devoted to finite element analysis. The classical approach is concerned with national and European engineering practice. The finite element approach includes the application of particular tool which preserves main recommendations from modern postulations in design of joints. The object of interest is welded beam-to-column joint with different structural elements and the stresses are obtained for two models. It is investigated correlation of results of weld stresses from both the approaches. Direct matching of results was neither expected nor found but basic correlation is revealed within the joint behaviour under loadings. Considering finite element approach as prevailing, its advantage is clearly shown throughout inclusion of local effects of plates. However, classical approach is essential for proper understanding of joint behaviour and should be always the first step in structural analysis. The usage of at least two different approaches is one way of improving safety checks in engineering and stands for purpose of validation or verification of design.",
publisher = "Faculty of Mechanical and Civil Engineering in Kraljevo",
journal = "XI International Conference Heavy Machinery - HM 2023",
title = "Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach",
pages = "A.8-A.1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7283"
}

Gašić, V., Arsić, A.,& Zrnić, N.. (2023). Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach. in XI International Conference Heavy Machinery - HM 2023
Faculty of Mechanical and Civil Engineering in Kraljevo., A.1-A.8.
https://hdl.handle.net/21.15107/rcub_machinery_7283

Gašić V, Arsić A, Zrnić N. Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach. in XI International Conference Heavy Machinery - HM 2023. 2023;:A.1-A.8.
https://hdl.handle.net/21.15107/rcub_machinery_7283 .

Gašić, Vlada, Arsić, Aleksandra, Zrnić, Nenad, "Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach" in XI International Conference Heavy Machinery - HM 2023 (2023):A.1-A.8,
https://hdl.handle.net/21.15107/rcub_machinery_7283 .

TY  - CONF
AU  - Trišović, Nataša
AU  - Li, Wei
AU  - Gavrilović, Marko
AU  - Baneasa Birtok, Corneliu
AU  - Ristić, Ognjen
AU  - Milić, Milica
AU  - Radulovic, Radoslav
AU  - Trišović, Zaga
AU  - Socalici, Ana Virginia
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7739
PB  - Academy of Applied Technical Studies Belgrade
C3  - International scientific and professional conference: "Politehnika 2023"
T1  - Effects of changing design parameters
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7739
ER  - 

@conference{
author = "Trišović, Nataša and Li, Wei and Gavrilović, Marko and Baneasa Birtok, Corneliu and Ristić, Ognjen and Milić, Milica and Radulovic, Radoslav and Trišović, Zaga and Socalici, Ana Virginia",
year = "2023",
publisher = "Academy of Applied Technical Studies Belgrade",
journal = "International scientific and professional conference: "Politehnika 2023"",
title = "Effects of changing design parameters",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7739"
}

Trišović, N., Li, W., Gavrilović, M., Baneasa Birtok, C., Ristić, O., Milić, M., Radulovic, R., Trišović, Z.,& Socalici, A. V.. (2023). Effects of changing design parameters. in International scientific and professional conference: "Politehnika 2023"
Academy of Applied Technical Studies Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_7739

Trišović N, Li W, Gavrilović M, Baneasa Birtok C, Ristić O, Milić M, Radulovic R, Trišović Z, Socalici AV. Effects of changing design parameters. in International scientific and professional conference: "Politehnika 2023". 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7739 .

Trišović, Nataša, Li, Wei, Gavrilović, Marko, Baneasa Birtok, Corneliu, Ristić, Ognjen, Milić, Milica, Radulovic, Radoslav, Trišović, Zaga, Socalici, Ana Virginia, "Effects of changing design parameters" in International scientific and professional conference: "Politehnika 2023" (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7739 .