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  - 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  - CHAP
AU  - Golubović, Zorana
AU  - Travica, Milan
AU  - Mitrović, Nenad
AU  - Trajković, Isaak
AU  - Milošević, Miloš
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7782
AB  - Additive manufacturing and 3D printing technologies are rapidly evolving and influencing changes in design, prototyping, engineering and manufacturing processes in various industries, including aerospace. In order to use 3D printing processes to produce parts with adequate and satisfactory mechanical properties for aircraft that are constantly exposed to extreme temperatures and environmental conditions, the temperature variations that occur must be taken into account. In this study, small-scale specimens of the thermoplastic polymer material polylactic acid (PLA) were printed using an FDM printer while a thermal imaging camera was used to record the temperature changes during the printing process. The aim was to determine the temperature changes during each step of the printing process of small specimens and to create a future model for testing the temperature distribution.
PB  - Springer
T2  - New Trends in Engineering Research
T1  - Development of a Method for Testing Temperature Distribution During 3D Printing of Specimens with Application in Aerospace Industry
EP  - 95
SP  - 90
VL  - 792
DO  - 10.1007/978-3-031-46432-4_7
ER  - 

@inbook{
author = "Golubović, Zorana and Travica, Milan and Mitrović, Nenad and Trajković, Isaak and Milošević, Miloš",
year = "2024",
abstract = "Additive manufacturing and 3D printing technologies are rapidly evolving and influencing changes in design, prototyping, engineering and manufacturing processes in various industries, including aerospace. In order to use 3D printing processes to produce parts with adequate and satisfactory mechanical properties for aircraft that are constantly exposed to extreme temperatures and environmental conditions, the temperature variations that occur must be taken into account. In this study, small-scale specimens of the thermoplastic polymer material polylactic acid (PLA) were printed using an FDM printer while a thermal imaging camera was used to record the temperature changes during the printing process. The aim was to determine the temperature changes during each step of the printing process of small specimens and to create a future model for testing the temperature distribution.",
publisher = "Springer",
journal = "New Trends in Engineering Research",
booktitle = "Development of a Method for Testing Temperature Distribution During 3D Printing of Specimens with Application in Aerospace Industry",
pages = "95-90",
volume = "792",
doi = "10.1007/978-3-031-46432-4_7"
}

Golubović, Z., Travica, M., Mitrović, N., Trajković, I.,& Milošević, M.. (2024). Development of a Method for Testing Temperature Distribution During 3D Printing of Specimens with Application in Aerospace Industry. in New Trends in Engineering Research
Springer., 792, 90-95.
https://doi.org/10.1007/978-3-031-46432-4_7

Golubović Z, Travica M, Mitrović N, Trajković I, Milošević M. Development of a Method for Testing Temperature Distribution During 3D Printing of Specimens with Application in Aerospace Industry. in New Trends in Engineering Research. 2024;792:90-95.
doi:10.1007/978-3-031-46432-4_7 .

Golubović, Zorana, Travica, Milan, Mitrović, Nenad, Trajković, Isaak, Milošević, Miloš, "Development of a Method for Testing Temperature Distribution During 3D Printing of Specimens with Application in Aerospace Industry" in New Trends in Engineering Research, 792 (2024):90-95,
https://doi.org/10.1007/978-3-031-46432-4_7 . .

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  - CONF
AU  - Golubović, Zorana
AU  - Mitrović, Aleksandra
AU  - Mitrović, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4809
AB  - Three-dimensional printing is an innovative technique which is offering advantages in engineering in terms of modeling and processing, even shapes and geometries which are complex and are difficult to be manufactured with other methods. This novel digital technology provides advantages in production process of an individualized 3D object when compared to subtractive computer numeric controlled methods and conventional dentistry techniques. Applied digital workflow in dentistry embraces data acquisition with intraoral scanning, object design in CAD software and 3D printing with corresponding materials on adequate 3D printer. With the utilization of the 3D techniques, it is possible to make adequate digital models and to reproduce them with enough precision, which led to a transformation in dentistry practice and a wide range of present and possible future applications.
An important benefit regarding 3D printing in dental practice is the fact that various materials can be used, such as polymers, resins, metals, ceramics etc., even multiple different materials during one production process, if needed. On the other side, there is a handful of available AM techniques depending on the model geometry complexity and desired accuracy. Implementation of 3D technologies proved to be beneficial in laboratory and clinical settings, surgical and restorative
dentistry, and continues to expand in research and dental education. The aim of this article was to give one perspective and to review the techniques, materials and current applications of 3D printing in dentistry. As well, significance of waste and recycling of materials used for printing in this area is pointed out.
PB  - Springer Science and Business Media Deutschland GmbH
C3  - Lecture Notes in Networks and Systems
T1  - 3D Printing in Contemporary Dentistry
EP  - 232
SP  - 213
VL  - 564
DO  - 10.1007/978-3-031-19499-3_12
ER  - 

@conference{
author = "Golubović, Zorana and Mitrović, Aleksandra and Mitrović, Nenad",
year = "2023",
abstract = "Three-dimensional printing is an innovative technique which is offering advantages in engineering in terms of modeling and processing, even shapes and geometries which are complex and are difficult to be manufactured with other methods. This novel digital technology provides advantages in production process of an individualized 3D object when compared to subtractive computer numeric controlled methods and conventional dentistry techniques. Applied digital workflow in dentistry embraces data acquisition with intraoral scanning, object design in CAD software and 3D printing with corresponding materials on adequate 3D printer. With the utilization of the 3D techniques, it is possible to make adequate digital models and to reproduce them with enough precision, which led to a transformation in dentistry practice and a wide range of present and possible future applications.
An important benefit regarding 3D printing in dental practice is the fact that various materials can be used, such as polymers, resins, metals, ceramics etc., even multiple different materials during one production process, if needed. On the other side, there is a handful of available AM techniques depending on the model geometry complexity and desired accuracy. Implementation of 3D technologies proved to be beneficial in laboratory and clinical settings, surgical and restorative
dentistry, and continues to expand in research and dental education. The aim of this article was to give one perspective and to review the techniques, materials and current applications of 3D printing in dentistry. As well, significance of waste and recycling of materials used for printing in this area is pointed out.",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Lecture Notes in Networks and Systems",
title = "3D Printing in Contemporary Dentistry",
pages = "232-213",
volume = "564",
doi = "10.1007/978-3-031-19499-3_12"
}

Golubović, Z., Mitrović, A.,& Mitrović, N.. (2023). 3D Printing in Contemporary Dentistry. in Lecture Notes in Networks and Systems
Springer Science and Business Media Deutschland GmbH., 564, 213-232.
https://doi.org/10.1007/978-3-031-19499-3_12

Golubović Z, Mitrović A, Mitrović N. 3D Printing in Contemporary Dentistry. in Lecture Notes in Networks and Systems. 2023;564:213-232.
doi:10.1007/978-3-031-19499-3_12 .

Golubović, Zorana, Mitrović, Aleksandra, Mitrović, Nenad, "3D Printing in Contemporary Dentistry" in Lecture Notes in Networks and Systems, 564 (2023):213-232,
https://doi.org/10.1007/978-3-031-19499-3_12 . .

TY  - CONF
AU  - Golubović, Zorana
AU  - Petrov, Ljubiša
AU  - Bojović, Božica
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7151
AB  - Additive manufacturing (AM) technologies have evolved significantly in recent decades, bringing new trends to production processes. The advantages compared to conventional technologies are numerous: production is simpler and faster, geometry can be adjusted more easily, the quality of finished parts is better, less material is wasted, and costs are lower. Because of the wide range of
possibilities, the different AM processes and the materials that can be used, these technologies have found their place in many industries, with significant application in biomedical field. Flexibility in geometric freedom, in particular, is important for the fabrication of biomedical devices. AM technologies proved that diagnostics is facilitated and improved through the fabrication of customized and in-demand parts, consultation between physicians and patients are supported, and thus the opportunity to develop individualized, patient-specific medicine is provided. This review briefly outlines current applications and AM processes in the biomedical field.
C3  - XVI International Scientific Conference Contemporary Materials, Banja Luka, September 7- 8th
T1  - Biomedical Engineering and Additive Manufacturing
SP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7151
ER  - 

@conference{
author = "Golubović, Zorana and Petrov, Ljubiša and Bojović, Božica",
year = "2023",
abstract = "Additive manufacturing (AM) technologies have evolved significantly in recent decades, bringing new trends to production processes. The advantages compared to conventional technologies are numerous: production is simpler and faster, geometry can be adjusted more easily, the quality of finished parts is better, less material is wasted, and costs are lower. Because of the wide range of
possibilities, the different AM processes and the materials that can be used, these technologies have found their place in many industries, with significant application in biomedical field. Flexibility in geometric freedom, in particular, is important for the fabrication of biomedical devices. AM technologies proved that diagnostics is facilitated and improved through the fabrication of customized and in-demand parts, consultation between physicians and patients are supported, and thus the opportunity to develop individualized, patient-specific medicine is provided. This review briefly outlines current applications and AM processes in the biomedical field.",
journal = "XVI International Scientific Conference Contemporary Materials, Banja Luka, September 7- 8th",
title = "Biomedical Engineering and Additive Manufacturing",
pages = "93",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7151"
}

Golubović, Z., Petrov, L.,& Bojović, B.. (2023). Biomedical Engineering and Additive Manufacturing. in XVI International Scientific Conference Contemporary Materials, Banja Luka, September 7- 8th, 93.
https://hdl.handle.net/21.15107/rcub_machinery_7151

Golubović Z, Petrov L, Bojović B. Biomedical Engineering and Additive Manufacturing. in XVI International Scientific Conference Contemporary Materials, Banja Luka, September 7- 8th. 2023;:93.
https://hdl.handle.net/21.15107/rcub_machinery_7151 .

Golubović, Zorana, Petrov, Ljubiša, Bojović, Božica, "Biomedical Engineering and Additive Manufacturing" in XVI International Scientific Conference Contemporary Materials, Banja Luka, September 7- 8th (2023):93,
https://hdl.handle.net/21.15107/rcub_machinery_7151 .

TY  - CONF
AU  - Mitrović, Nenad
AU  - Golubović, Zorana
AU  - Mitrović, Aleksandra
AU  - Travica, Milan
AU  - Trajković, Isaak
AU  - Milošević, Miloš
AU  - Petrović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7705
AB  - The three-point bending test is a widely used and important method for evaluating the mechanical properties of materials. Its versatility, applicability, and ability to provide valuable information on flexural strength, stiffness, and fracture toughness make it a valuable tool in materials science, engineering, and biomedical research. Digital Image Correlation (DIC) provides a high resolution and full-field measurement of deformation during the bending process. DIC also allows for the calculation of strain fields, which can be used to determine material properties such as Young's modulus and Poisson's ratio. This is particularly important in understanding the strain distribution and identifying potential failure mechanisms in the material. In this paper, the potential application of the 2D Digital Image Correlation method on three-point bending tests is presented.
PB  - The Academy of Applied Technical Studies "Belgrade"
C3  - International Scientific and Professional Conference Politehnika 2023
T1  - APPLICATION OF 2D DIGITAL IMAGE CORRELATION METHOD ON THREE-POINT BENDING IN MATERIAL TESTING
EP  - 1071
SP  - 1068
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7705
ER  - 

@conference{
author = "Mitrović, Nenad and Golubović, Zorana and Mitrović, Aleksandra and Travica, Milan and Trajković, Isaak and Milošević, Miloš and Petrović, Aleksandar",
year = "2023",
abstract = "The three-point bending test is a widely used and important method for evaluating the mechanical properties of materials. Its versatility, applicability, and ability to provide valuable information on flexural strength, stiffness, and fracture toughness make it a valuable tool in materials science, engineering, and biomedical research. Digital Image Correlation (DIC) provides a high resolution and full-field measurement of deformation during the bending process. DIC also allows for the calculation of strain fields, which can be used to determine material properties such as Young's modulus and Poisson's ratio. This is particularly important in understanding the strain distribution and identifying potential failure mechanisms in the material. In this paper, the potential application of the 2D Digital Image Correlation method on three-point bending tests is presented.",
publisher = "The Academy of Applied Technical Studies "Belgrade"",
journal = "International Scientific and Professional Conference Politehnika 2023",
title = "APPLICATION OF 2D DIGITAL IMAGE CORRELATION METHOD ON THREE-POINT BENDING IN MATERIAL TESTING",
pages = "1071-1068",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7705"
}

Mitrović, N., Golubović, Z., Mitrović, A., Travica, M., Trajković, I., Milošević, M.,& Petrović, A.. (2023). APPLICATION OF 2D DIGITAL IMAGE CORRELATION METHOD ON THREE-POINT BENDING IN MATERIAL TESTING. in International Scientific and Professional Conference Politehnika 2023
The Academy of Applied Technical Studies "Belgrade"., 1068-1071.
https://hdl.handle.net/21.15107/rcub_machinery_7705

Mitrović N, Golubović Z, Mitrović A, Travica M, Trajković I, Milošević M, Petrović A. APPLICATION OF 2D DIGITAL IMAGE CORRELATION METHOD ON THREE-POINT BENDING IN MATERIAL TESTING. in International Scientific and Professional Conference Politehnika 2023. 2023;:1068-1071.
https://hdl.handle.net/21.15107/rcub_machinery_7705 .

Mitrović, Nenad, Golubović, Zorana, Mitrović, Aleksandra, Travica, Milan, Trajković, Isaak, Milošević, Miloš, Petrović, Aleksandar, "APPLICATION OF 2D DIGITAL IMAGE CORRELATION METHOD ON THREE-POINT BENDING IN MATERIAL TESTING" in International Scientific and Professional Conference Politehnika 2023 (2023):1068-1071,
https://hdl.handle.net/21.15107/rcub_machinery_7705 .

TY  - JOUR
AU  - Golubović, Zorana
AU  - Travica, Milan
AU  - Trajković, Isaak
AU  - Petrović, Aleksandar
AU  - Mišković, Žarko
AU  - Mitrović, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4705
AB  - Fused deposition modeling is one of the most widely used 3-D printing technologies, among other additive manufacturing processes, because it is easy to use,
can produce parts faster, and the cost of the finished part is low. Printing processes and finished parts are often studied and characterized using different
techniques to collect mechanical, numerical, thermal and dimensional data, with
the aim of improving and optimizing the result. The first part of this research is
based on the observation of temperature changes with a thermal imaging camera
during the fused deposition modeling printing process and during the cooling
process after printing. Specimens of polylactic acid and polylactic acid-X improved with second-phase particles were prepared to compare the thermal and
dimensional properties of the two materials. The obtained results determined the
characteristic temperature behavior of the materials. In the second part of the research, a 3-D optical scanner was used to verify the stability and accuracy of the
printed specimens over time. The proposed measurement period showed that stabilization of the parameters takes place, and further follow-up should be performed thereafter.
PB  - Beograd : Institut za nuklearne nauke Vinča
T2  - Thermal Science
T1  - Investigation of thermal and dimensional behavior of 3-D printed materials using thermal imaging and 3-D scanning
EP  - 31
SP  - 21
VL  - 27
DO  - 10.2298/TSCI2301021G
ER  - 

@article{
author = "Golubović, Zorana and Travica, Milan and Trajković, Isaak and Petrović, Aleksandar and Mišković, Žarko and Mitrović, Nenad",
year = "2023",
abstract = "Fused deposition modeling is one of the most widely used 3-D printing technologies, among other additive manufacturing processes, because it is easy to use,
can produce parts faster, and the cost of the finished part is low. Printing processes and finished parts are often studied and characterized using different
techniques to collect mechanical, numerical, thermal and dimensional data, with
the aim of improving and optimizing the result. The first part of this research is
based on the observation of temperature changes with a thermal imaging camera
during the fused deposition modeling printing process and during the cooling
process after printing. Specimens of polylactic acid and polylactic acid-X improved with second-phase particles were prepared to compare the thermal and
dimensional properties of the two materials. The obtained results determined the
characteristic temperature behavior of the materials. In the second part of the research, a 3-D optical scanner was used to verify the stability and accuracy of the
printed specimens over time. The proposed measurement period showed that stabilization of the parameters takes place, and further follow-up should be performed thereafter.",
publisher = "Beograd : Institut za nuklearne nauke Vinča",
journal = "Thermal Science",
title = "Investigation of thermal and dimensional behavior of 3-D printed materials using thermal imaging and 3-D scanning",
pages = "31-21",
volume = "27",
doi = "10.2298/TSCI2301021G"
}

Golubović, Z., Travica, M., Trajković, I., Petrović, A., Mišković, Ž.,& Mitrović, N.. (2023). Investigation of thermal and dimensional behavior of 3-D printed materials using thermal imaging and 3-D scanning. in Thermal Science
Beograd : Institut za nuklearne nauke Vinča., 27, 21-31.
https://doi.org/10.2298/TSCI2301021G

Golubović Z, Travica M, Trajković I, Petrović A, Mišković Ž, Mitrović N. Investigation of thermal and dimensional behavior of 3-D printed materials using thermal imaging and 3-D scanning. in Thermal Science. 2023;27:21-31.
doi:10.2298/TSCI2301021G .

Golubović, Zorana, Travica, Milan, Trajković, Isaak, Petrović, Aleksandar, Mišković, Žarko, Mitrović, Nenad, "Investigation of thermal and dimensional behavior of 3-D printed materials using thermal imaging and 3-D scanning" in Thermal Science, 27 (2023):21-31,
https://doi.org/10.2298/TSCI2301021G . .

TY  - JOUR
AU  - Petrov, Ljubiša
AU  - Bojović, Božica
AU  - Golubović, Zorana
AU  - Sedmak, Aleksandar
AU  - Mišković, Žarko
AU  - Trajković, Isaak
AU  - Milošević, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7149
AB  - Since the beginnings of additive manufacturing (AM) in the 1980s, vat polymerization was the first and most intensively developing technology that enabled the production of very precise parts from photosensitive polymer resins. One of the most studied polymer materials is acrylonitrile butadiene styrene (ABS), but mostly in the form of filaments for the FDM (Fused Deposition Modelling) process. The objective of this research was to investigate in detail the mechanical properties of ABS resin specimens fabricated by stereolithography (SLA) and digital light processing (DLP). Specimen geometries were based on standards for tensile, threepoint bending, and compression tests. By combining deformation and mechanical tests with optical microscopic analyses of the morphology and fracture surface structures, as well as Shore A hardness measurements, a deeper insight into the behaviour of commercially available ABS resins was gained.
T2  - Structural Integrity and Life
T1  - Experimental Mechanical Characterization of Parts Manufactured by SLA and DLP Technologies
EP  - 121
IS  - 2
SP  - 117
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7149
ER  - 

@article{
author = "Petrov, Ljubiša and Bojović, Božica and Golubović, Zorana and Sedmak, Aleksandar and Mišković, Žarko and Trajković, Isaak and Milošević, Miloš",
year = "2023",
abstract = "Since the beginnings of additive manufacturing (AM) in the 1980s, vat polymerization was the first and most intensively developing technology that enabled the production of very precise parts from photosensitive polymer resins. One of the most studied polymer materials is acrylonitrile butadiene styrene (ABS), but mostly in the form of filaments for the FDM (Fused Deposition Modelling) process. The objective of this research was to investigate in detail the mechanical properties of ABS resin specimens fabricated by stereolithography (SLA) and digital light processing (DLP). Specimen geometries were based on standards for tensile, threepoint bending, and compression tests. By combining deformation and mechanical tests with optical microscopic analyses of the morphology and fracture surface structures, as well as Shore A hardness measurements, a deeper insight into the behaviour of commercially available ABS resins was gained.",
journal = "Structural Integrity and Life",
title = "Experimental Mechanical Characterization of Parts Manufactured by SLA and DLP Technologies",
pages = "121-117",
number = "2",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7149"
}

Petrov, L., Bojović, B., Golubović, Z., Sedmak, A., Mišković, Ž., Trajković, I.,& Milošević, M.. (2023). Experimental Mechanical Characterization of Parts Manufactured by SLA and DLP Technologies. in Structural Integrity and Life, 23(2), 117-121.
https://hdl.handle.net/21.15107/rcub_machinery_7149

Petrov L, Bojović B, Golubović Z, Sedmak A, Mišković Ž, Trajković I, Milošević M. Experimental Mechanical Characterization of Parts Manufactured by SLA and DLP Technologies. in Structural Integrity and Life. 2023;23(2):117-121.
https://hdl.handle.net/21.15107/rcub_machinery_7149 .

Petrov, Ljubiša, Bojović, Božica, Golubović, Zorana, Sedmak, Aleksandar, Mišković, Žarko, Trajković, Isaak, Milošević, Miloš, "Experimental Mechanical Characterization of Parts Manufactured by SLA and DLP Technologies" in Structural Integrity and Life, 23, no. 2 (2023):117-121,
https://hdl.handle.net/21.15107/rcub_machinery_7149 .

TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Golubović, Zorana
AU  - Kirin, Snežana
AU  - Babinsky, Tomas
AU  - Šulak, Ivo
AU  - Milošević, Miloš
AU  - Sedmak, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7147
AB  - Polypropylene (PP) is a relatively new material in fused deposition modeling
(FDM) technology. The main feature of this material is its ability to significantly elongate under
applied load, unlike any other thermoplastic material used in FDM technology. Not much research has been conducted on this FDM material so far, hence, the subject of this paper is the
investigation of printing parameters’ influence on PP tensile properties. Targeted parameters are
layer height, infill density, and the orientation of raster lines, resulting in four different manufacturing regimes. To have a better insight into the experimental results, the data are analysed using ANOVA statistical method with Tukey HSD post hoc test. Obtained statistical results have proven the printing parameter’s influence on tensile results, emphasizing the influence on elastic modulus. Here, Tukey test results show the maximal number of homogeneous subsets evidencing that all printing parameters have an influence on elastic modulus values.
T2  - Journal of Mechanical Science and Technology
T1  - Manufacturing parameter influence on FDM polypropylene tensile properties
VL  - 37
DO  - 10.1007/s12206-023-2305-5
ER  - 

@article{
author = "Milovanović, Aleksa and Golubović, Zorana and Kirin, Snežana and Babinsky, Tomas and Šulak, Ivo and Milošević, Miloš and Sedmak, Aleksandar",
year = "2023",
abstract = "Polypropylene (PP) is a relatively new material in fused deposition modeling
(FDM) technology. The main feature of this material is its ability to significantly elongate under
applied load, unlike any other thermoplastic material used in FDM technology. Not much research has been conducted on this FDM material so far, hence, the subject of this paper is the
investigation of printing parameters’ influence on PP tensile properties. Targeted parameters are
layer height, infill density, and the orientation of raster lines, resulting in four different manufacturing regimes. To have a better insight into the experimental results, the data are analysed using ANOVA statistical method with Tukey HSD post hoc test. Obtained statistical results have proven the printing parameter’s influence on tensile results, emphasizing the influence on elastic modulus. Here, Tukey test results show the maximal number of homogeneous subsets evidencing that all printing parameters have an influence on elastic modulus values.",
journal = "Journal of Mechanical Science and Technology",
title = "Manufacturing parameter influence on FDM polypropylene tensile properties",
volume = "37",
doi = "10.1007/s12206-023-2305-5"
}

Milovanović, A., Golubović, Z., Kirin, S., Babinsky, T., Šulak, I., Milošević, M.,& Sedmak, A.. (2023). Manufacturing parameter influence on FDM polypropylene tensile properties. in Journal of Mechanical Science and Technology, 37.
https://doi.org/10.1007/s12206-023-2305-5

Milovanović A, Golubović Z, Kirin S, Babinsky T, Šulak I, Milošević M, Sedmak A. Manufacturing parameter influence on FDM polypropylene tensile properties. in Journal of Mechanical Science and Technology. 2023;37.
doi:10.1007/s12206-023-2305-5 .

Milovanović, Aleksa, Golubović, Zorana, Kirin, Snežana, Babinsky, Tomas, Šulak, Ivo, Milošević, Miloš, Sedmak, Aleksandar, "Manufacturing parameter influence on FDM polypropylene tensile properties" in Journal of Mechanical Science and Technology, 37 (2023),
https://doi.org/10.1007/s12206-023-2305-5 . .

TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Golubović, Zorana
AU  - Kirin, Snežana
AU  - Babinský, Tomáš
AU  - Šulák, Ivo
AU  - Milošević, Miloš
AU  - Sedmak, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7643
AB  - Polypropylene (PP) is a relatively new material in fused deposition modeling (FDM) technology. The main feature of this material is its ability to significantly elongate under applied load, unlike any other thermoplastic material used in FDM technology. Not much research has been conducted on this FDM material so far, hence, the subject of this paper is the investigation of printing parameters’ influence on PP tensile properties. Targeted parameters are layer height, infill density, and the orientation of raster lines, resulting in four different manufacturing regimes. To have a better insight into the experimental results, the data are analysed using ANOVA statistical method with Tukey HSD post hoc test. Obtained statistical results have proven the printing parameter’s influence on tensile results, emphasizing the influence on elastic modulus. Here, Tukey test results show the maximal number of homogeneous subsets evidencing that all printing parameters have an influence on elastic modulus values.
T2  - Journal of Mechanical Science and Technology
T1  - Manufacturing parameter influence on FDM polypropylene tensile properties
EP  - 7
IS  - 11
SP  - 1
VL  - 37
DO  - 10.1007/s12206-023-2305-5
ER  - 

@article{
author = "Milovanović, Aleksa and Golubović, Zorana and Kirin, Snežana and Babinský, Tomáš and Šulák, Ivo and Milošević, Miloš and Sedmak, Aleksandar",
year = "2023",
abstract = "Polypropylene (PP) is a relatively new material in fused deposition modeling (FDM) technology. The main feature of this material is its ability to significantly elongate under applied load, unlike any other thermoplastic material used in FDM technology. Not much research has been conducted on this FDM material so far, hence, the subject of this paper is the investigation of printing parameters’ influence on PP tensile properties. Targeted parameters are layer height, infill density, and the orientation of raster lines, resulting in four different manufacturing regimes. To have a better insight into the experimental results, the data are analysed using ANOVA statistical method with Tukey HSD post hoc test. Obtained statistical results have proven the printing parameter’s influence on tensile results, emphasizing the influence on elastic modulus. Here, Tukey test results show the maximal number of homogeneous subsets evidencing that all printing parameters have an influence on elastic modulus values.",
journal = "Journal of Mechanical Science and Technology",
title = "Manufacturing parameter influence on FDM polypropylene tensile properties",
pages = "7-1",
number = "11",
volume = "37",
doi = "10.1007/s12206-023-2305-5"
}

Milovanović, A., Golubović, Z., Kirin, S., Babinský, T., Šulák, I., Milošević, M.,& Sedmak, A.. (2023). Manufacturing parameter influence on FDM polypropylene tensile properties. in Journal of Mechanical Science and Technology, 37(11), 1-7.
https://doi.org/10.1007/s12206-023-2305-5

Milovanović A, Golubović Z, Kirin S, Babinský T, Šulák I, Milošević M, Sedmak A. Manufacturing parameter influence on FDM polypropylene tensile properties. in Journal of Mechanical Science and Technology. 2023;37(11):1-7.
doi:10.1007/s12206-023-2305-5 .

Milovanović, Aleksa, Golubović, Zorana, Kirin, Snežana, Babinský, Tomáš, Šulák, Ivo, Milošević, Miloš, Sedmak, Aleksandar, "Manufacturing parameter influence on FDM polypropylene tensile properties" in Journal of Mechanical Science and Technology, 37, no. 11 (2023):1-7,
https://doi.org/10.1007/s12206-023-2305-5 . .

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  - JOUR
AU  - Jevtić, Ivana
AU  - Golubović, Zorana
AU  - Mladenović, Goran
AU  - Berto, Filippo
AU  - Sedmak, Aleksandar
AU  - Milovanović, Aleksa
AU  - Milošević, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7011
AB  - Selective laser sintering (SLS) is one of the additive manufacturing technologies dedicated to the production of high-quality parts with complex geometries. Here, polyamide 12 (PA12) is a commonly used material, for manufacturing parts with sufficient mechanical and thermal properties. In SLS, many manufacturing parameters have an effect on the mechanical properties of final parts. Even the decision regarding the orientation of a part in a powder bed may have a significant effect on the mechanical properties. In this research, the influence of horizontal (H) and vertical (V) printing orientations on the ultimate tensile strength (UTS) of fabricated PA12 specimens are examined. Our research findings show that H specimens exhibit larger deformations and smaller UTS value scatter in comparison with V specimens. Also, worth pointing out is the fact that V-oriented specimens have a higher elastic modulus. One can assume that the sintering process is more effective in V specimens, due to a more uniform laser beam trajectory than in the H specimens' case.
PB  - Springer
T2  - Journal of Mechanical and Technology
T1  - Printing orientation influence on tensile strength of PA12 specimens obtained by SLS
EP  - 6
IS  - 11
SP  - 1
VL  - 37
DO  - 10.1007/s12206-023-2306-4
ER  - 

@article{
author = "Jevtić, Ivana and Golubović, Zorana and Mladenović, Goran and Berto, Filippo and Sedmak, Aleksandar and Milovanović, Aleksa and Milošević, Miloš",
year = "2023",
abstract = "Selective laser sintering (SLS) is one of the additive manufacturing technologies dedicated to the production of high-quality parts with complex geometries. Here, polyamide 12 (PA12) is a commonly used material, for manufacturing parts with sufficient mechanical and thermal properties. In SLS, many manufacturing parameters have an effect on the mechanical properties of final parts. Even the decision regarding the orientation of a part in a powder bed may have a significant effect on the mechanical properties. In this research, the influence of horizontal (H) and vertical (V) printing orientations on the ultimate tensile strength (UTS) of fabricated PA12 specimens are examined. Our research findings show that H specimens exhibit larger deformations and smaller UTS value scatter in comparison with V specimens. Also, worth pointing out is the fact that V-oriented specimens have a higher elastic modulus. One can assume that the sintering process is more effective in V specimens, due to a more uniform laser beam trajectory than in the H specimens' case.",
publisher = "Springer",
journal = "Journal of Mechanical and Technology",
title = "Printing orientation influence on tensile strength of PA12 specimens obtained by SLS",
pages = "6-1",
number = "11",
volume = "37",
doi = "10.1007/s12206-023-2306-4"
}

Jevtić, I., Golubović, Z., Mladenović, G., Berto, F., Sedmak, A., Milovanović, A.,& Milošević, M.. (2023). Printing orientation influence on tensile strength of PA12 specimens obtained by SLS. in Journal of Mechanical and Technology
Springer., 37(11), 1-6.
https://doi.org/10.1007/s12206-023-2306-4

Jevtić I, Golubović Z, Mladenović G, Berto F, Sedmak A, Milovanović A, Milošević M. Printing orientation influence on tensile strength of PA12 specimens obtained by SLS. in Journal of Mechanical and Technology. 2023;37(11):1-6.
doi:10.1007/s12206-023-2306-4 .

Jevtić, Ivana, Golubović, Zorana, Mladenović, Goran, Berto, Filippo, Sedmak, Aleksandar, Milovanović, Aleksa, Milošević, Miloš, "Printing orientation influence on tensile strength of PA12 specimens obtained by SLS" in Journal of Mechanical and Technology, 37, no. 11 (2023):1-6,
https://doi.org/10.1007/s12206-023-2306-4 . .

TY  - GEN
AU  - Golubović, Zorana
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7150
AB  - Polylactic acid (PLA) is the most widely studied and used thermoplastic material for additive manufacturing (AM) processes, alongside Acrylonitrile Butadiene Styrene (ABS), It belongs to a class of renewable and biodegradable polymers with versatile applications in various industries. So far, PLA has shown a relatively high modulus of elasticity and high tensile strength compared to other thermoplastic polymers. PLA has mainly been examined in its use in extrusion-based AM technology called Fused Deposition Modeling (FDM), in which material filaments are passed through a hot nozzle, melted, and deposited layer by layer on a build platform. The goal of this research was to characterize and compare the properties of PLA specimens produced in the 
form of filaments using an FDM printer with those of PLA specimens produced in the form of resin using a Digital Light Processing (DLP) printer. Unlike the FDM process, the DLP as one of the VAT 
photopolymerization processes, which involves placing the resin material in a tank and curing it with UV light emitted from an LCD screen, resulting in hardening of the polymer with pixel resolution. For mechanical testing, standardized specimens were prepared and tested on a standard testing machine. An optical microscope was used to determine surface properties and crack cross-sections. The results show that the mechanical properties of the PLA material favor the FDM technology and the filament type of the material, considering that the maximum stress and elastic modulus are higher and the specimens are tougher compared to the DLP specimens. However, DLP technology has the potential to be used with resin form of known filament materials, regardless of the lack of certain properties, by adjusting the printing parameters and specific requirements.
T2  - „International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH, Zlatibor, July 04- July 07
T1  - Detailed Characterization of PLA and PLA Resin Additively Manufactured Materials
SP  - 18
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7150
ER  - 

@misc{
author = "Golubović, Zorana",
year = "2023",
abstract = "Polylactic acid (PLA) is the most widely studied and used thermoplastic material for additive manufacturing (AM) processes, alongside Acrylonitrile Butadiene Styrene (ABS), It belongs to a class of renewable and biodegradable polymers with versatile applications in various industries. So far, PLA has shown a relatively high modulus of elasticity and high tensile strength compared to other thermoplastic polymers. PLA has mainly been examined in its use in extrusion-based AM technology called Fused Deposition Modeling (FDM), in which material filaments are passed through a hot nozzle, melted, and deposited layer by layer on a build platform. The goal of this research was to characterize and compare the properties of PLA specimens produced in the 
form of filaments using an FDM printer with those of PLA specimens produced in the form of resin using a Digital Light Processing (DLP) printer. Unlike the FDM process, the DLP as one of the VAT 
photopolymerization processes, which involves placing the resin material in a tank and curing it with UV light emitted from an LCD screen, resulting in hardening of the polymer with pixel resolution. For mechanical testing, standardized specimens were prepared and tested on a standard testing machine. An optical microscope was used to determine surface properties and crack cross-sections. The results show that the mechanical properties of the PLA material favor the FDM technology and the filament type of the material, considering that the maximum stress and elastic modulus are higher and the specimens are tougher compared to the DLP specimens. However, DLP technology has the potential to be used with resin form of known filament materials, regardless of the lack of certain properties, by adjusting the printing parameters and specific requirements.",
journal = "„International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH, Zlatibor, July 04- July 07",
title = "Detailed Characterization of PLA and PLA Resin Additively Manufactured Materials",
pages = "18",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7150"
}

Golubović, Z.. (2023). Detailed Characterization of PLA and PLA Resin Additively Manufactured Materials. in „International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH, Zlatibor, July 04- July 07, 18.
https://hdl.handle.net/21.15107/rcub_machinery_7150

Golubović Z. Detailed Characterization of PLA and PLA Resin Additively Manufactured Materials. in „International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH, Zlatibor, July 04- July 07. 2023;:18.
https://hdl.handle.net/21.15107/rcub_machinery_7150 .

Golubović, Zorana, "Detailed Characterization of PLA and PLA Resin Additively Manufactured Materials" in „International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH, Zlatibor, July 04- July 07 (2023):18,
https://hdl.handle.net/21.15107/rcub_machinery_7150 .

TY  - JOUR
AU  - Golubović, Zorana
AU  - Danilov, Ivan
AU  - Bojović, Božica
AU  - Petrov, Ljubiša
AU  - Sedmak, Aleksandar
AU  - Mišković, Žarko
AU  - Mitrović, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7077
AB  - Additive manufacturing technologies have developed rapidly in recent decades, pushing
the limits of known manufacturing processes. The need to study the properties of the different
materials used for these processes comprehensively and in detail has become a primary goal in order
to get the best out of the manufacturing itself. The widely used thermoplastic polymer material
acrylonitrile butadiene styrene (ABS) was selected in the form of both filaments and ABS-like resins
to investigate and compare the mechanical properties through a series of different tests. ABS-like
resin material is commercially available, but it is not a sufficiently mechanically studied form of
the material, which leads to the rather limited literature. Considering that ABS resin is a declared
material that behaves like the ABS filament but in a different form, the objective of this study was to
compare these two commercially available materials printed with three different 3D printers, namely
Fused Deposition Modelling (FDM), Stereolithography (SLA) and Digital Light Processing (DLP). A
total of 45 test specimens with geometries and test protocols conforming to the relevant standards
were subjected to a series of tensile, three-point bending and compression tests to determine their
mechanical properties. Characterization also included evaluation of morphology with 2D and 3D
microscopy, dimensional accuracy of 3D scans, and Shore A hardness of each material and 3D printing
process. Tensile testing results have shown that FDM toughness is 40% of the value for DLP. FDM
elongation at break is 37% of DLP, while ultimate tensile stress for SLA is 27% higher than FDM value.
Elastic modulus for FDM and SLA coincide. Flexure testing results indicate that value of DLP flexural
modulus is 54% of the FDM value. SLA strain value is 59% of FDM, and DLP ultimate flexure stress
is 77% of the value for FDM. Compression test results imply that FDM specimens absorb at least
twice as much energy as vat polymerized specimens. Strain at break for SLA is 72% and strain at
ultimate stress is 60% of FDM values. FDM yield stress is 32% higher than DLP value. SLA ultimate
compressive stress is half of FDM, while value for DLP compressive modulus is 69% of the FDM
value. The results obtained are beneficial and give a more comprehensive picture of the behavior of
the ABS polymers used in different forms and different AM processes
PB  - MDPI
T2  - Polymers
T1  - A Comprehensive Mechanical Examination of ABS and ABS-like Polymers Additively Manufactured by Material Extrusion and Vat Photopolymerization Processes
IS  - 21
SP  - 4197
VL  - 15
DO  - 10.3390/polym15214197
ER  - 

@article{
author = "Golubović, Zorana and Danilov, Ivan and Bojović, Božica and Petrov, Ljubiša and Sedmak, Aleksandar and Mišković, Žarko and Mitrović, Nenad",
year = "2023",
abstract = "Additive manufacturing technologies have developed rapidly in recent decades, pushing
the limits of known manufacturing processes. The need to study the properties of the different
materials used for these processes comprehensively and in detail has become a primary goal in order
to get the best out of the manufacturing itself. The widely used thermoplastic polymer material
acrylonitrile butadiene styrene (ABS) was selected in the form of both filaments and ABS-like resins
to investigate and compare the mechanical properties through a series of different tests. ABS-like
resin material is commercially available, but it is not a sufficiently mechanically studied form of
the material, which leads to the rather limited literature. Considering that ABS resin is a declared
material that behaves like the ABS filament but in a different form, the objective of this study was to
compare these two commercially available materials printed with three different 3D printers, namely
Fused Deposition Modelling (FDM), Stereolithography (SLA) and Digital Light Processing (DLP). A
total of 45 test specimens with geometries and test protocols conforming to the relevant standards
were subjected to a series of tensile, three-point bending and compression tests to determine their
mechanical properties. Characterization also included evaluation of morphology with 2D and 3D
microscopy, dimensional accuracy of 3D scans, and Shore A hardness of each material and 3D printing
process. Tensile testing results have shown that FDM toughness is 40% of the value for DLP. FDM
elongation at break is 37% of DLP, while ultimate tensile stress for SLA is 27% higher than FDM value.
Elastic modulus for FDM and SLA coincide. Flexure testing results indicate that value of DLP flexural
modulus is 54% of the FDM value. SLA strain value is 59% of FDM, and DLP ultimate flexure stress
is 77% of the value for FDM. Compression test results imply that FDM specimens absorb at least
twice as much energy as vat polymerized specimens. Strain at break for SLA is 72% and strain at
ultimate stress is 60% of FDM values. FDM yield stress is 32% higher than DLP value. SLA ultimate
compressive stress is half of FDM, while value for DLP compressive modulus is 69% of the FDM
value. The results obtained are beneficial and give a more comprehensive picture of the behavior of
the ABS polymers used in different forms and different AM processes",
publisher = "MDPI",
journal = "Polymers",
title = "A Comprehensive Mechanical Examination of ABS and ABS-like Polymers Additively Manufactured by Material Extrusion and Vat Photopolymerization Processes",
number = "21",
pages = "4197",
volume = "15",
doi = "10.3390/polym15214197"
}

Golubović, Z., Danilov, I., Bojović, B., Petrov, L., Sedmak, A., Mišković, Ž.,& Mitrović, N.. (2023). A Comprehensive Mechanical Examination of ABS and ABS-like Polymers Additively Manufactured by Material Extrusion and Vat Photopolymerization Processes. in Polymers
MDPI., 15(21), 4197.
https://doi.org/10.3390/polym15214197

Golubović Z, Danilov I, Bojović B, Petrov L, Sedmak A, Mišković Ž, Mitrović N. A Comprehensive Mechanical Examination of ABS and ABS-like Polymers Additively Manufactured by Material Extrusion and Vat Photopolymerization Processes. in Polymers. 2023;15(21):4197.
doi:10.3390/polym15214197 .

Golubović, Zorana, Danilov, Ivan, Bojović, Božica, Petrov, Ljubiša, Sedmak, Aleksandar, Mišković, Žarko, Mitrović, Nenad, "A Comprehensive Mechanical Examination of ABS and ABS-like Polymers Additively Manufactured by Material Extrusion and Vat Photopolymerization Processes" in Polymers, 15, no. 21 (2023):4197,
https://doi.org/10.3390/polym15214197 . .

TY  - CONF
AU  - Golubović, Zorana
AU  - Milovanović, Aleksa
AU  - Mitrović, Aleksandra
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7370
AB  - 3D printing as digital fabrication technology became widely popular and used due to its ease in production and customization of any type of design in various fields of industry, medicine, or research. Different printing processes are based on making an object by deposition of material layer by layer, from previously created CAD model. Quality of 3D printed parts is dependent on many parameters such as chemical composition of used materials, printing parameters (infill percentage, infill pattern, building orientation, raster angle,..), thermal behaviour during and after printing processes, aging effect, mechanical properties (static and dynamic analysis), accuracy of printed parts, morphology and topology. With regard to the area of characteristics, which should be examined, different standards, procedures and equipment are employed. In this context, it is challenging task to link various parameters to obtain the best part performances. Given the large number of different possibilities in testing of final 3D printed product, understanding the influential parameters of structure of the material and final part is essential. This paper presents an overview of characterization methods that can be used in order to observe morphology and topology of printed parts.
C3  - International conference of experimental and numerical investigations and new technologies (2022 ; Zlatibor)
T1  - Characterization of 3D printed parts
SP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7370
ER  - 

@conference{
author = "Golubović, Zorana and Milovanović, Aleksa and Mitrović, Aleksandra",
year = "2022",
abstract = "3D printing as digital fabrication technology became widely popular and used due to its ease in production and customization of any type of design in various fields of industry, medicine, or research. Different printing processes are based on making an object by deposition of material layer by layer, from previously created CAD model. Quality of 3D printed parts is dependent on many parameters such as chemical composition of used materials, printing parameters (infill percentage, infill pattern, building orientation, raster angle,..), thermal behaviour during and after printing processes, aging effect, mechanical properties (static and dynamic analysis), accuracy of printed parts, morphology and topology. With regard to the area of characteristics, which should be examined, different standards, procedures and equipment are employed. In this context, it is challenging task to link various parameters to obtain the best part performances. Given the large number of different possibilities in testing of final 3D printed product, understanding the influential parameters of structure of the material and final part is essential. This paper presents an overview of characterization methods that can be used in order to observe morphology and topology of printed parts.",
journal = "International conference of experimental and numerical investigations and new technologies (2022 ; Zlatibor)",
title = "Characterization of 3D printed parts",
pages = "56",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7370"
}

Golubović, Z., Milovanović, A.,& Mitrović, A.. (2022). Characterization of 3D printed parts. in International conference of experimental and numerical investigations and new technologies (2022 ; Zlatibor), 56.
https://hdl.handle.net/21.15107/rcub_machinery_7370

Golubović Z, Milovanović A, Mitrović A. Characterization of 3D printed parts. in International conference of experimental and numerical investigations and new technologies (2022 ; Zlatibor). 2022;:56.
https://hdl.handle.net/21.15107/rcub_machinery_7370 .

Golubović, Zorana, Milovanović, Aleksa, Mitrović, Aleksandra, "Characterization of 3D printed parts" in International conference of experimental and numerical investigations and new technologies (2022 ; Zlatibor) (2022):56,
https://hdl.handle.net/21.15107/rcub_machinery_7370 .

TY  - JOUR
AU  - Milošević, Miloš
AU  - Trajković, Isaak
AU  - Golubović, Zorana
AU  - Ivanov, Toni
AU  - Mladenović, Goran
AU  - Milovanović, Aleksa
AU  - Mitrović, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5424
AB  - Martial arts and fight sports are mostly based on exchanging the punches and kicks that often result with injuries of face, skull bones, and neck vertebrae. One of possibilities to reduce number of injuries in athletes who deal with martial arts is development of new materials and improvement of designs for helmets used in sport fights. In order to experimentally analyze impact forces and simulate conditions during different fight punches mechanical installment was made. Aramis system is used to measure the displacement fields and the distribution of deformations which occur on the neck over the entire analyzed area based on the correlation of digital images. On this manner better understanding of behavior of both materials and structures during the action of the impact forces and loading is obtained. This information can further be used in researches related to the development of helmets used in martial arts which would influence reduction of values of neck deformations in athletes.
PB  - SAGE
T2  - Advances in Mechanical Engineering
T1  - Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts
EP  - 14
EP  - M23
IS  - 8
SP  - 1
VL  - 14
DO  - 10.1177/16878132221121515
ER  - 

@article{
author = "Milošević, Miloš and Trajković, Isaak and Golubović, Zorana and Ivanov, Toni and Mladenović, Goran and Milovanović, Aleksa and Mitrović, Nenad",
year = "2022",
abstract = "Martial arts and fight sports are mostly based on exchanging the punches and kicks that often result with injuries of face, skull bones, and neck vertebrae. One of possibilities to reduce number of injuries in athletes who deal with martial arts is development of new materials and improvement of designs for helmets used in sport fights. In order to experimentally analyze impact forces and simulate conditions during different fight punches mechanical installment was made. Aramis system is used to measure the displacement fields and the distribution of deformations which occur on the neck over the entire analyzed area based on the correlation of digital images. On this manner better understanding of behavior of both materials and structures during the action of the impact forces and loading is obtained. This information can further be used in researches related to the development of helmets used in martial arts which would influence reduction of values of neck deformations in athletes.",
publisher = "SAGE",
journal = "Advances in Mechanical Engineering",
title = "Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts",
pages = "14-M23-1",
number = "8",
volume = "14",
doi = "10.1177/16878132221121515"
}

Milošević, M., Trajković, I., Golubović, Z., Ivanov, T., Mladenović, G., Milovanović, A.,& Mitrović, N.. (2022). Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts. in Advances in Mechanical Engineering
SAGE., 14(8), 1-14.
https://doi.org/10.1177/16878132221121515

Milošević M, Trajković I, Golubović Z, Ivanov T, Mladenović G, Milovanović A, Mitrović N. Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts. in Advances in Mechanical Engineering. 2022;14(8):1-14.
doi:10.1177/16878132221121515 .

Milošević, Miloš, Trajković, Isaak, Golubović, Zorana, Ivanov, Toni, Mladenović, Goran, Milovanović, Aleksa, Mitrović, Nenad, "Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts" in Advances in Mechanical Engineering, 14, no. 8 (2022):1-14,
https://doi.org/10.1177/16878132221121515 . .

TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Golubović, Zorana
AU  - Babinský, Tomáš
AU  - Šulák, Ivo
AU  - Mitrović, Aleksandra
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7195
AB  - Polypropylene (PP) is an extensively studied and tested environment-friendly polymer, whose applications range from product packaging in the food industry to biomedical applications. It is a non-toxic, lightweight material, relatively simple for processing. Research findings show that PP material has higher elongation than any other thermoplastic material used in Fused Deposition Modeling (FDM) technology, which is the most developed and used extrusion-based additive technology. In FDM, many printing parameters must be set before the actual additive manufacturing process, and they have a decisive influence on the mechanical properties of fabricated parts. In this research, layer height, infill density, and raster orientation are the parameters considered in the analysis, resulting in four specimen batches being prepared for tensile testing.
PB  - Society for Structural Integrity and Life
PB  - IMS Institute
T2  - STRUCTURAL INTEGRITY AND LIFE
T1  - Tensile properties of polypropylene additively manufactured by FDM
EP  - 308
IS  - 3
SP  - 305
VL  - 22
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7195
ER  - 

@article{
author = "Milovanović, Aleksa and Golubović, Zorana and Babinský, Tomáš and Šulák, Ivo and Mitrović, Aleksandra",
year = "2022",
abstract = "Polypropylene (PP) is an extensively studied and tested environment-friendly polymer, whose applications range from product packaging in the food industry to biomedical applications. It is a non-toxic, lightweight material, relatively simple for processing. Research findings show that PP material has higher elongation than any other thermoplastic material used in Fused Deposition Modeling (FDM) technology, which is the most developed and used extrusion-based additive technology. In FDM, many printing parameters must be set before the actual additive manufacturing process, and they have a decisive influence on the mechanical properties of fabricated parts. In this research, layer height, infill density, and raster orientation are the parameters considered in the analysis, resulting in four specimen batches being prepared for tensile testing.",
publisher = "Society for Structural Integrity and Life, IMS Institute",
journal = "STRUCTURAL INTEGRITY AND LIFE",
title = "Tensile properties of polypropylene additively manufactured by FDM",
pages = "308-305",
number = "3",
volume = "22",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7195"
}

Milovanović, A., Golubović, Z., Babinský, T., Šulák, I.,& Mitrović, A.. (2022). Tensile properties of polypropylene additively manufactured by FDM. in STRUCTURAL INTEGRITY AND LIFE
Society for Structural Integrity and Life., 22(3), 305-308.
https://hdl.handle.net/21.15107/rcub_machinery_7195

Milovanović A, Golubović Z, Babinský T, Šulák I, Mitrović A. Tensile properties of polypropylene additively manufactured by FDM. in STRUCTURAL INTEGRITY AND LIFE. 2022;22(3):305-308.
https://hdl.handle.net/21.15107/rcub_machinery_7195 .

Milovanović, Aleksa, Golubović, Zorana, Babinský, Tomáš, Šulák, Ivo, Mitrović, Aleksandra, "Tensile properties of polypropylene additively manufactured by FDM" in STRUCTURAL INTEGRITY AND LIFE, 22, no. 3 (2022):305-308,
https://hdl.handle.net/21.15107/rcub_machinery_7195 .

TY  - CONF
AU  - Mitrović, Aleksandra
AU  - Milošev, Milan
AU  - Golubović, Zorana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7153
AB  - The topic of this paper is welding analysis of steel construction of prefabricated facilities. The basic material for making steel structures – steel S235JR, with an adequate technological process was selected and used. In a detailed paper introduction, a layout algorithm of all operations performed during production is defined. During the production of prefabricated facilities, beside machining and welding, special attention is paid to the choice of basic and additional material, preparation and cleaning of welding edges, defects and repairs of welded joints. Welding was performed by an electric arc process which represents one of the most efficient ways of welding nowadays. The choice of methods used in this paper is determined by the nature of the problem of undesirable errors in the weld. Also, welding control of welded joints with the Ultrasonic method is presented. The obtained results showed that the welded joints were of good quality. This importance of this 
research is reflected through its practical application.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia
T1  - Structure in The Construction of Prefabricated Facilities
SP  - 63
SP  - 14
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7153
ER  - 

@conference{
author = "Mitrović, Aleksandra and Milošev, Milan and Golubović, Zorana",
year = "2022",
abstract = "The topic of this paper is welding analysis of steel construction of prefabricated facilities. The basic material for making steel structures – steel S235JR, with an adequate technological process was selected and used. In a detailed paper introduction, a layout algorithm of all operations performed during production is defined. During the production of prefabricated facilities, beside machining and welding, special attention is paid to the choice of basic and additional material, preparation and cleaning of welding edges, defects and repairs of welded joints. Welding was performed by an electric arc process which represents one of the most efficient ways of welding nowadays. The choice of methods used in this paper is determined by the nature of the problem of undesirable errors in the weld. Also, welding control of welded joints with the Ultrasonic method is presented. The obtained results showed that the welded joints were of good quality. This importance of this 
research is reflected through its practical application.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia",
title = "Structure in The Construction of Prefabricated Facilities",
pages = "63-14",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7153"
}

Mitrović, A., Milošev, M.,& Golubović, Z.. (2022). Structure in The Construction of Prefabricated Facilities. in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia, 63.
https://hdl.handle.net/21.15107/rcub_machinery_7153

Mitrović A, Milošev M, Golubović Z. Structure in The Construction of Prefabricated Facilities. in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia. 2022;:63.
https://hdl.handle.net/21.15107/rcub_machinery_7153 .

Mitrović, Aleksandra, Milošev, Milan, Golubović, Zorana, "Structure in The Construction of Prefabricated Facilities" in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia (2022):63,
https://hdl.handle.net/21.15107/rcub_machinery_7153 .

TY  - CONF
AU  - Mitrović, Aleksandra
AU  - Milovanović, Vladan
AU  - Golubović, Zorana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7154
AB  - The aim of this paper was the welding of various materials that will be used in the exploitation of a rotary excavator for coal mining. Problems observed in practice are frequent welding errors, repairs, loss of time, loss of additional material and hiring a large number of people. Welding was performed on caterpillar crawler pad. In this paper, welding was referred to the steel castings of GX120Mn13 and G22NiMoCr5-6 with structural steel S355. Welding process was defined by MAG procedure, plasma cutting, bending on press brakes, welding parameters and errors in joints. Also, the complete manufacturing procedure that was performed was described, starting from cutting parts to surface protection. This explains how the crawler pad of rotary excavator was made, where errors occurred, what were the weaknesses of the material as where was a lack of process organization. Through the paper, it has been shown where the manufacturing process will be conducted more rationally with minimal errors and deformations.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia
T1  - Various Materials Weldability for Steel Casting
EP  - 13
SP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7154
ER  - 

@conference{
author = "Mitrović, Aleksandra and Milovanović, Vladan and Golubović, Zorana",
year = "2022",
abstract = "The aim of this paper was the welding of various materials that will be used in the exploitation of a rotary excavator for coal mining. Problems observed in practice are frequent welding errors, repairs, loss of time, loss of additional material and hiring a large number of people. Welding was performed on caterpillar crawler pad. In this paper, welding was referred to the steel castings of GX120Mn13 and G22NiMoCr5-6 with structural steel S355. Welding process was defined by MAG procedure, plasma cutting, bending on press brakes, welding parameters and errors in joints. Also, the complete manufacturing procedure that was performed was described, starting from cutting parts to surface protection. This explains how the crawler pad of rotary excavator was made, where errors occurred, what were the weaknesses of the material as where was a lack of process organization. Through the paper, it has been shown where the manufacturing process will be conducted more rationally with minimal errors and deformations.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia",
title = "Various Materials Weldability for Steel Casting",
pages = "13-13",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7154"
}

Mitrović, A., Milovanović, V.,& Golubović, Z.. (2022). Various Materials Weldability for Steel Casting. in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia, 13-13.
https://hdl.handle.net/21.15107/rcub_machinery_7154

Mitrović A, Milovanović V, Golubović Z. Various Materials Weldability for Steel Casting. in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia. 2022;:13-13.
https://hdl.handle.net/21.15107/rcub_machinery_7154 .

Mitrović, Aleksandra, Milovanović, Vladan, Golubović, Zorana, "Various Materials Weldability for Steel Casting" in International Conference of Experimental and Numerical Investigations and New Technologies, 05 – 08 July 2022, Zlatibor, Serbia (2022):13-13,
https://hdl.handle.net/21.15107/rcub_machinery_7154 .

TY  - CONF
AU  - Golubović, Zorana
AU  - Travica, Milan
AU  - Trajković, Isaak
AU  - Petrović, Aleksandar
AU  - Mišković, Žarko
AU  - Mitrović, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7152
AB  - Fused deposition modelling is, among the other additive manufacturing processes, one of the 
most frequently used three-dimensional printing technologies, because of its ease of use, high speed in production and low cost of the final part. Printing processes and finished parts are often examined and characterized using various techniques, for gathering the mechanical, numerical, thermal, dimensional data, with goal to improve and optimize the outcome. The first part of this research is 
based on the following the temperature changes using thermal imaging camera during fused deposi-
tion modelling printing processes and during cooling process after printing is finished. Specimens 
were made from polylactic acid and polylactic acid - X improved with second-phase particles, in 
order to compare thermal and dimensional characteristics of both materials. Obtained results determined characteristic temperature behavior of materials. The second part of research employed optical 3D scanner for verification the stability and accuracy of printed specimens over time. Proposed period of measuring has shown that stabilization of parameters is taking place, and further follow-up should be done afterwards.
C3  - Proceedins of the 35th International Conference of Process Industry - Processing 2022
T1  - Investigation of Thermal and Dimensional Behavior of 3D Printed Materials Using Thermal Imaging and 3D Scanning
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7152
ER  - 

@conference{
author = "Golubović, Zorana and Travica, Milan and Trajković, Isaak and Petrović, Aleksandar and Mišković, Žarko and Mitrović, Nenad",
year = "2022",
abstract = "Fused deposition modelling is, among the other additive manufacturing processes, one of the 
most frequently used three-dimensional printing technologies, because of its ease of use, high speed in production and low cost of the final part. Printing processes and finished parts are often examined and characterized using various techniques, for gathering the mechanical, numerical, thermal, dimensional data, with goal to improve and optimize the outcome. The first part of this research is 
based on the following the temperature changes using thermal imaging camera during fused deposi-
tion modelling printing processes and during cooling process after printing is finished. Specimens 
were made from polylactic acid and polylactic acid - X improved with second-phase particles, in 
order to compare thermal and dimensional characteristics of both materials. Obtained results determined characteristic temperature behavior of materials. The second part of research employed optical 3D scanner for verification the stability and accuracy of printed specimens over time. Proposed period of measuring has shown that stabilization of parameters is taking place, and further follow-up should be done afterwards.",
journal = "Proceedins of the 35th International Conference of Process Industry - Processing 2022",
title = "Investigation of Thermal and Dimensional Behavior of 3D Printed Materials Using Thermal Imaging and 3D Scanning",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7152"
}

Golubović, Z., Travica, M., Trajković, I., Petrović, A., Mišković, Ž.,& Mitrović, N.. (2022). Investigation of Thermal and Dimensional Behavior of 3D Printed Materials Using Thermal Imaging and 3D Scanning. in Proceedins of the 35th International Conference of Process Industry - Processing 2022.
https://hdl.handle.net/21.15107/rcub_machinery_7152

Golubović Z, Travica M, Trajković I, Petrović A, Mišković Ž, Mitrović N. Investigation of Thermal and Dimensional Behavior of 3D Printed Materials Using Thermal Imaging and 3D Scanning. in Proceedins of the 35th International Conference of Process Industry - Processing 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_7152 .

Golubović, Zorana, Travica, Milan, Trajković, Isaak, Petrović, Aleksandar, Mišković, Žarko, Mitrović, Nenad, "Investigation of Thermal and Dimensional Behavior of 3D Printed Materials Using Thermal Imaging and 3D Scanning" in Proceedins of the 35th International Conference of Process Industry - Processing 2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_7152 .

TY  - CONF
AU  - Golubović, Zorana
AU  - Mitrović, Aleksandra
AU  - Travica, Milan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6312
AB  - Contact lenses have been used and manufactured for decades now, but recently 3D printing technologies were introduced as a new way of production. As a rapidly developing technology, 3D printing offers new possibilities for development and advantages in the manufacturing process of lenses, due to easy customization and geometry modelling. Standard production is not leaving much space for individual demands, concerning different ophthalmic diagnoses and unique patients’ eye characteristics. In this paper, the main emphasis is on the further development of the design and characteristics of lenses fabricated by this technology that can satisfactorily overcome the drawbacks of production approaches used until now. Areas of possible improvements are significant, meeting the individual demands of patients, customizing needed parameters for better therapy, biocompatibility, the possibility to integrate different optical sensors for diagnostics, even making the smart lenses, etc. There are a very limited number of studies dealing with 3D printing and examination of printed contact lenses, which leads to the conclusion that this is the research area of the future.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts
T1  - Possibilities in Production of 3D Printed Contact Lenses
EP  - 57
SP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6312
ER  - 

@conference{
author = "Golubović, Zorana and Mitrović, Aleksandra and Travica, Milan",
year = "2022",
abstract = "Contact lenses have been used and manufactured for decades now, but recently 3D printing technologies were introduced as a new way of production. As a rapidly developing technology, 3D printing offers new possibilities for development and advantages in the manufacturing process of lenses, due to easy customization and geometry modelling. Standard production is not leaving much space for individual demands, concerning different ophthalmic diagnoses and unique patients’ eye characteristics. In this paper, the main emphasis is on the further development of the design and characteristics of lenses fabricated by this technology that can satisfactorily overcome the drawbacks of production approaches used until now. Areas of possible improvements are significant, meeting the individual demands of patients, customizing needed parameters for better therapy, biocompatibility, the possibility to integrate different optical sensors for diagnostics, even making the smart lenses, etc. There are a very limited number of studies dealing with 3D printing and examination of printed contact lenses, which leads to the conclusion that this is the research area of the future.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts",
title = "Possibilities in Production of 3D Printed Contact Lenses",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6312"
}

Golubović, Z., Mitrović, A.,& Travica, M.. (2022). Possibilities in Production of 3D Printed Contact Lenses. in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts
University of Belgrade, Faculty of Mechanical Engineering., 57-57.
https://hdl.handle.net/21.15107/rcub_machinery_6312

Golubović Z, Mitrović A, Travica M. Possibilities in Production of 3D Printed Contact Lenses. in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts. 2022;:57-57.
https://hdl.handle.net/21.15107/rcub_machinery_6312 .

Golubović, Zorana, Mitrović, Aleksandra, Travica, Milan, "Possibilities in Production of 3D Printed Contact Lenses" in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts (2022):57-57,
https://hdl.handle.net/21.15107/rcub_machinery_6312 .

TY  - JOUR
AU  - Golubović, Zorana
AU  - Milovanović, Aleksa
AU  - Mitrović, Aleksandra
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6310
AB  - 3D printing as digital fabrication technology became widely popular and used due to its ease in production and customization of any type of design in various fields of industry, medicine, or research. Different printing processes are based on making an object by deposition of material layer by layer, from previously created CAD model. Quality of 3D printed parts is dependent on many parameters such as chemical composition of used materials, printing parameters (infill percentage, infill pattern, building orientation, raster angle,..), thermal behaviour during and after printing processes, aging effect, mechanical properties (static and dynamic analysis), accuracy of printed parts, morphology and topology. With regard to the area of characteristics, which 
should be examined, different standards, procedures and equipment are employed. In this context, it is challenging task to link various parameters to obtain the best part performances. Given the large number of different possibilities in testing of final 3D printed product, understanding the influential parameters of structure of the material and final part is essential. This paper presents an overview of characterization methods that can be used in order to observe morphology and topology of printed parts.
PB  - University of Belgrade, Faculty of Mechanical Engineering
T2  - International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts
T1  - Characterization of 3D Printed Parts
EP  - 56
SP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6310
ER  - 

@article{
author = "Golubović, Zorana and Milovanović, Aleksa and Mitrović, Aleksandra",
year = "2022",
abstract = "3D printing as digital fabrication technology became widely popular and used due to its ease in production and customization of any type of design in various fields of industry, medicine, or research. Different printing processes are based on making an object by deposition of material layer by layer, from previously created CAD model. Quality of 3D printed parts is dependent on many parameters such as chemical composition of used materials, printing parameters (infill percentage, infill pattern, building orientation, raster angle,..), thermal behaviour during and after printing processes, aging effect, mechanical properties (static and dynamic analysis), accuracy of printed parts, morphology and topology. With regard to the area of characteristics, which 
should be examined, different standards, procedures and equipment are employed. In this context, it is challenging task to link various parameters to obtain the best part performances. Given the large number of different possibilities in testing of final 3D printed product, understanding the influential parameters of structure of the material and final part is essential. This paper presents an overview of characterization methods that can be used in order to observe morphology and topology of printed parts.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts",
title = "Characterization of 3D Printed Parts",
pages = "56-56",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6310"
}

Golubović, Z., Milovanović, A.,& Mitrović, A.. (2022). Characterization of 3D Printed Parts. in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts
University of Belgrade, Faculty of Mechanical Engineering., 56-56.
https://hdl.handle.net/21.15107/rcub_machinery_6310

Golubović Z, Milovanović A, Mitrović A. Characterization of 3D Printed Parts. in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts. 2022;:56-56.
https://hdl.handle.net/21.15107/rcub_machinery_6310 .

Golubović, Zorana, Milovanović, Aleksa, Mitrović, Aleksandra, "Characterization of 3D Printed Parts" in International Conference of Experimental and Numerical Investigations and New Technologies "CNN TECH 2022" - Book of Abstracts (2022):56-56,
https://hdl.handle.net/21.15107/rcub_machinery_6310 .

TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Golubović, Zorana
AU  - Babinský, Tomáš
AU  - Šulák, Ivo
AU  - Mitrović, Aleksandra
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5530
AB  - Polypropylene (PP) is an extensively studied and tested environment-friendly polymer, whose applications range from product packaging in the food industry to biomedical applications. It is a non-toxic, lightweight material, relatively simple for processing. Research findings show that PP material has higher elongation than any other thermoplastic material used in Fused Deposition Modeling (FDM) technology, which is the most developed and used extrusion based additive technology. In FDM, many printing parameters must be set before the actual additive manufacturing process, and they have a decisive influence on the mechanical properties of fabricated parts. In this research, layer height, infill density, and raster orientation are the parameters considered in the analysis, resulting in four specimen batches being prepared for tensile testing.
PB  - Društvo za integritet i vek konstrukcija
T2  - Structural Integrity and Life
T1  - Tensile properties of polypropylene additively manufactured by FDM
EP  - 308
IS  - 3
SP  - 305
VL  - 22
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5530
ER  - 

@article{
author = "Milovanović, Aleksa and Golubović, Zorana and Babinský, Tomáš and Šulák, Ivo and Mitrović, Aleksandra",
year = "2022",
abstract = "Polypropylene (PP) is an extensively studied and tested environment-friendly polymer, whose applications range from product packaging in the food industry to biomedical applications. It is a non-toxic, lightweight material, relatively simple for processing. Research findings show that PP material has higher elongation than any other thermoplastic material used in Fused Deposition Modeling (FDM) technology, which is the most developed and used extrusion based additive technology. In FDM, many printing parameters must be set before the actual additive manufacturing process, and they have a decisive influence on the mechanical properties of fabricated parts. In this research, layer height, infill density, and raster orientation are the parameters considered in the analysis, resulting in four specimen batches being prepared for tensile testing.",
publisher = "Društvo za integritet i vek konstrukcija",
journal = "Structural Integrity and Life",
title = "Tensile properties of polypropylene additively manufactured by FDM",
pages = "308-305",
number = "3",
volume = "22",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5530"
}

Milovanović, A., Golubović, Z., Babinský, T., Šulák, I.,& Mitrović, A.. (2022). Tensile properties of polypropylene additively manufactured by FDM. in Structural Integrity and Life
Društvo za integritet i vek konstrukcija., 22(3), 305-308.
https://hdl.handle.net/21.15107/rcub_machinery_5530

Milovanović A, Golubović Z, Babinský T, Šulák I, Mitrović A. Tensile properties of polypropylene additively manufactured by FDM. in Structural Integrity and Life. 2022;22(3):305-308.
https://hdl.handle.net/21.15107/rcub_machinery_5530 .

Milovanović, Aleksa, Golubović, Zorana, Babinský, Tomáš, Šulák, Ivo, Mitrović, Aleksandra, "Tensile properties of polypropylene additively manufactured by FDM" in Structural Integrity and Life, 22, no. 3 (2022):305-308,
https://hdl.handle.net/21.15107/rcub_machinery_5530 .

TY  - CONF
AU  - Milovanović, Aleksa
AU  - Golubović, Zorana
AU  - Trajković, Isaak
AU  - Sedmak, Aleksandar
AU  - Milošević, Miloš
AU  - Valean, E.
AU  - Marsavina, Liviu
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3819
AB  - The majority of manufacturers of polymer filaments for FDM technology rely their datasheets only on tensile tests, so their documentation usually lacks any data concerning fracture mechanics parameters. Having in mind the importance of fracture mechanics parameters in material design and application e.g., plane-strain fracture toughness, and the fact that it can be measured using only standard tensile grips, or three-point bending test fixture on a regular tensile testing machine, this practice offers vital information for AM components carrying the load. Anyhow, it is not always a simple task to satisfy all requirements of the standard for plane-strain fracture toughness assessment of plastic materials (ASTM D5045-14), as in the case of FDM technology due to many printing parameters that not only influence fracture toughness results, but also can question the eligibility of test results if crack propagation deviates from the expected path or if the specimens don't meet the size criterion necessary for achieving the plane-strain condition. These problems are tackled in this research on PLA polymer, a material widely used in FDM technology. For this research SENB specimens are prepared according to ASTM D5045-14 standard and tested on tensile testing machine using three-point bending test fixture
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Influence of printing parameters on the eligibility of plane-strain fracture toughness results for PLA polymer
EP  - 297
IS  - C
SP  - 290
VL  - 41
DO  - 10.1016/j.prostr.2022.05.034
ER  - 

@conference{
author = "Milovanović, Aleksa and Golubović, Zorana and Trajković, Isaak and Sedmak, Aleksandar and Milošević, Miloš and Valean, E. and Marsavina, Liviu",
year = "2022",
abstract = "The majority of manufacturers of polymer filaments for FDM technology rely their datasheets only on tensile tests, so their documentation usually lacks any data concerning fracture mechanics parameters. Having in mind the importance of fracture mechanics parameters in material design and application e.g., plane-strain fracture toughness, and the fact that it can be measured using only standard tensile grips, or three-point bending test fixture on a regular tensile testing machine, this practice offers vital information for AM components carrying the load. Anyhow, it is not always a simple task to satisfy all requirements of the standard for plane-strain fracture toughness assessment of plastic materials (ASTM D5045-14), as in the case of FDM technology due to many printing parameters that not only influence fracture toughness results, but also can question the eligibility of test results if crack propagation deviates from the expected path or if the specimens don't meet the size criterion necessary for achieving the plane-strain condition. These problems are tackled in this research on PLA polymer, a material widely used in FDM technology. For this research SENB specimens are prepared according to ASTM D5045-14 standard and tested on tensile testing machine using three-point bending test fixture",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Influence of printing parameters on the eligibility of plane-strain fracture toughness results for PLA polymer",
pages = "297-290",
number = "C",
volume = "41",
doi = "10.1016/j.prostr.2022.05.034"
}

Milovanović, A., Golubović, Z., Trajković, I., Sedmak, A., Milošević, M., Valean, E.,& Marsavina, L.. (2022). Influence of printing parameters on the eligibility of plane-strain fracture toughness results for PLA polymer. in Procedia Structural Integrity
Elsevier B.V.., 41(C), 290-297.
https://doi.org/10.1016/j.prostr.2022.05.034

Milovanović A, Golubović Z, Trajković I, Sedmak A, Milošević M, Valean E, Marsavina L. Influence of printing parameters on the eligibility of plane-strain fracture toughness results for PLA polymer. in Procedia Structural Integrity. 2022;41(C):290-297.
doi:10.1016/j.prostr.2022.05.034 .

Milovanović, Aleksa, Golubović, Zorana, Trajković, Isaak, Sedmak, Aleksandar, Milošević, Miloš, Valean, E., Marsavina, Liviu, "Influence of printing parameters on the eligibility of plane-strain fracture toughness results for PLA polymer" in Procedia Structural Integrity, 41, no. C (2022):290-297,
https://doi.org/10.1016/j.prostr.2022.05.034 . .