TY  - JOUR
AU  - Tanasković, Jovan
AU  - Franklin, F.
AU  - Radović, Nenad A.
AU  - Zivić, Fatima
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3826
AB  - The subject of this paper is the structural design of a safety steel device that is located between the standard wagon buffer and the collision energy absorber. The safety steel device is a sacrifical part able to withstand normal operating loads from the buffer across the absorber to the vehicle bearing structure without any permanent deformation, but experiences fully controlled fracture when the load exceeds the defined threshold. Following fracture, the load path is through the energy absorber. The sacrificial part is a ring made from quenched and tempered low alloyed steel with precisely defined heat treatment and material properties. Experimental investigations of scaled samples were performed to get mechanical characteristics of the material and geometry. A full-scale prototype of the safety device was produced, and final quasi-static and dynamic experiments were conducted. The results validate the anaytical predictions, and thus validate the design method used here for dimensioning the safety steel device.
PB  - Budapest Tech Polytechnical Institution
T2  - Acta Polytechnica Hungarica
T1  - Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations
EP  - 33
IS  - 6
SP  - 21
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3826
ER  - 

@article{
author = "Tanasković, Jovan and Franklin, F. and Radović, Nenad A. and Zivić, Fatima",
year = "2022",
abstract = "The subject of this paper is the structural design of a safety steel device that is located between the standard wagon buffer and the collision energy absorber. The safety steel device is a sacrifical part able to withstand normal operating loads from the buffer across the absorber to the vehicle bearing structure without any permanent deformation, but experiences fully controlled fracture when the load exceeds the defined threshold. Following fracture, the load path is through the energy absorber. The sacrificial part is a ring made from quenched and tempered low alloyed steel with precisely defined heat treatment and material properties. Experimental investigations of scaled samples were performed to get mechanical characteristics of the material and geometry. A full-scale prototype of the safety device was produced, and final quasi-static and dynamic experiments were conducted. The results validate the anaytical predictions, and thus validate the design method used here for dimensioning the safety steel device.",
publisher = "Budapest Tech Polytechnical Institution",
journal = "Acta Polytechnica Hungarica",
title = "Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations",
pages = "33-21",
number = "6",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3826"
}

Tanasković, J., Franklin, F., Radović, N. A.,& Zivić, F.. (2022). Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations. in Acta Polytechnica Hungarica
Budapest Tech Polytechnical Institution., 19(6), 21-33.
https://hdl.handle.net/21.15107/rcub_machinery_3826

Tanasković J, Franklin F, Radović NA, Zivić F. Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations. in Acta Polytechnica Hungarica. 2022;19(6):21-33.
https://hdl.handle.net/21.15107/rcub_machinery_3826 .

Tanasković, Jovan, Franklin, F., Radović, Nenad A., Zivić, Fatima, "Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations" in Acta Polytechnica Hungarica, 19, no. 6 (2022):21-33,
https://hdl.handle.net/21.15107/rcub_machinery_3826 .

TY  - JOUR
AU  - Zivić, Fatima
AU  - Adamović, Dragan
AU  - Mitrović, Slobodan
AU  - Grujović, Nenad
AU  - Tanasković, Jovan
AU  - Stojadinović, Ivan
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/99
AB  - Dynamic friction coefficient (COF) of the reciprocating sliding contact of the conventional UHMWPE, was investigated in four different environments (dry contact; distilled water; pure Ringer's solution and with PMMA particles), at five values of low normal load (0.1-1 N) and three values of sliding speed (4 - 12 mm/s). Significant differences of COF values occurred at the lowest load (0.1 N), whereas sliding speed did not influence COF values. Addition of PMMA particles in Ringer's solution produced significant increase of COF values, especially at the lowest load of 0.1 N. For the dry contact and the highest load (1 N), steady state was reached shortly after the beginning of the test and friction coefficient had uniform behaviour. In the case of wet environment and the lowest load, steady state was not reached and the friction coefficient exhibited non-reproducible random behaviour. According to the Hertz theory, 0.5 N load corresponded to the elastic stress of 48.7 MPa, thus surpassing the values of the elastic limits, hardness and true yield stress of the UHMWPE, and the behaviour of the friction coefficient was drastically different below and above this load value. It can be assumed that below the 0.5 N load, viscoelastic response, accompanied with plastic deformation is dominant, with transition to mainly plastic deformation for the higher loads.
PB  - Sage Publications Ltd, London
T2  - Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
T1  - Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE)
DO  - 10.1177/13506501211053100
ER  - 

@article{
author = "Zivić, Fatima and Adamović, Dragan and Mitrović, Slobodan and Grujović, Nenad and Tanasković, Jovan and Stojadinović, Ivan",
year = "2021",
abstract = "Dynamic friction coefficient (COF) of the reciprocating sliding contact of the conventional UHMWPE, was investigated in four different environments (dry contact; distilled water; pure Ringer's solution and with PMMA particles), at five values of low normal load (0.1-1 N) and three values of sliding speed (4 - 12 mm/s). Significant differences of COF values occurred at the lowest load (0.1 N), whereas sliding speed did not influence COF values. Addition of PMMA particles in Ringer's solution produced significant increase of COF values, especially at the lowest load of 0.1 N. For the dry contact and the highest load (1 N), steady state was reached shortly after the beginning of the test and friction coefficient had uniform behaviour. In the case of wet environment and the lowest load, steady state was not reached and the friction coefficient exhibited non-reproducible random behaviour. According to the Hertz theory, 0.5 N load corresponded to the elastic stress of 48.7 MPa, thus surpassing the values of the elastic limits, hardness and true yield stress of the UHMWPE, and the behaviour of the friction coefficient was drastically different below and above this load value. It can be assumed that below the 0.5 N load, viscoelastic response, accompanied with plastic deformation is dominant, with transition to mainly plastic deformation for the higher loads.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology",
title = "Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE)",
doi = "10.1177/13506501211053100"
}

Zivić, F., Adamović, D., Mitrović, S., Grujović, N., Tanasković, J.,& Stojadinović, I.. (2021). Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE). in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
Sage Publications Ltd, London..
https://doi.org/10.1177/13506501211053100

Zivić F, Adamović D, Mitrović S, Grujović N, Tanasković J, Stojadinović I. Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE). in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology. 2021;.
doi:10.1177/13506501211053100 .

Zivić, Fatima, Adamović, Dragan, Mitrović, Slobodan, Grujović, Nenad, Tanasković, Jovan, Stojadinović, Ivan, "Influence of different environments on the sliding friction of Ultra-high-molecular-weight polyethylene (UHMWPE)" in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology (2021),
https://doi.org/10.1177/13506501211053100 . .

TY  - JOUR
AU  - Zivić, Fatima
AU  - Grujović, Nenad
AU  - Mitrović, Slobodan
AU  - Tanasković, Jovan
AU  - Todorović, Petar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3572
AB  - This paper presents microstructural properties and damage behaviour of a vacuum mixed poly(methyl metacrylate) (PMMA) bone cement, during the sliding contact with AISI 316L stainless steel, under micro-loads. Influence of the Ringer's solution on the wear was analysed in comparison to dry contact. The variation of load did not produce any significant change of the wear factor while the increase in the sliding speed induced significant increases in the wear factor, more pronounced in the case of dry sliding. The obtained wear factors were in average higher for the sliding in Ringer's solution than those obtained under dry conditions. Significant fragmentation of the worn tracks, of irregular shapes with broken edges, was observed, slightly more pronounced for the dry contact. Many cavities and voids were formed on the wear track surface, but they did not extend into the bulk material. Higher loads produced more uniform and less fragmented wear tracks. Abrasive, adhesive wear and plastic deformation grooves were observed, as well as fatigue and erosive wear. Fatigue cracks developed in the direction normal to sliding. Network of fine craze cracks was exhibited on the surface of wear tracks, especially pronounced in the case of dry sliding. These results are important since they contribute to understanding the sites of crack initiation, and development mechanisms on the surface of PMMA bone cements, also including synergistic effects of physiological environments pertaining to the non-steady crack and craze behaviour and crack pattern development in PMMA.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Influence of the Ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316L stainless steel
EP  - 92
IS  - 2
SP  - 77
VL  - 75
DO  - 10.2298/HEMIND210105011Z
ER  - 

@article{
author = "Zivić, Fatima and Grujović, Nenad and Mitrović, Slobodan and Tanasković, Jovan and Todorović, Petar",
year = "2021",
abstract = "This paper presents microstructural properties and damage behaviour of a vacuum mixed poly(methyl metacrylate) (PMMA) bone cement, during the sliding contact with AISI 316L stainless steel, under micro-loads. Influence of the Ringer's solution on the wear was analysed in comparison to dry contact. The variation of load did not produce any significant change of the wear factor while the increase in the sliding speed induced significant increases in the wear factor, more pronounced in the case of dry sliding. The obtained wear factors were in average higher for the sliding in Ringer's solution than those obtained under dry conditions. Significant fragmentation of the worn tracks, of irregular shapes with broken edges, was observed, slightly more pronounced for the dry contact. Many cavities and voids were formed on the wear track surface, but they did not extend into the bulk material. Higher loads produced more uniform and less fragmented wear tracks. Abrasive, adhesive wear and plastic deformation grooves were observed, as well as fatigue and erosive wear. Fatigue cracks developed in the direction normal to sliding. Network of fine craze cracks was exhibited on the surface of wear tracks, especially pronounced in the case of dry sliding. These results are important since they contribute to understanding the sites of crack initiation, and development mechanisms on the surface of PMMA bone cements, also including synergistic effects of physiological environments pertaining to the non-steady crack and craze behaviour and crack pattern development in PMMA.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Influence of the Ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316L stainless steel",
pages = "92-77",
number = "2",
volume = "75",
doi = "10.2298/HEMIND210105011Z"
}

Zivić, F., Grujović, N., Mitrović, S., Tanasković, J.,& Todorović, P.. (2021). Influence of the Ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316L stainless steel. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 75(2), 77-92.
https://doi.org/10.2298/HEMIND210105011Z

Zivić F, Grujović N, Mitrović S, Tanasković J, Todorović P. Influence of the Ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316L stainless steel. in Hemijska Industrija. 2021;75(2):77-92.
doi:10.2298/HEMIND210105011Z .

Zivić, Fatima, Grujović, Nenad, Mitrović, Slobodan, Tanasković, Jovan, Todorović, Petar, "Influence of the Ringer's solution on wear of vacuum mixed poly(methyl methacrylate) bone cement in reciprocating sliding contact with AISI 316L stainless steel" in Hemijska Industrija, 75, no. 2 (2021):77-92,
https://doi.org/10.2298/HEMIND210105011Z . .