TY  - JOUR
AU  - Mirković, Nikola
AU  - Brajović, Ljiljana
AU  - Popović, Zdenka
AU  - Todorović, Goran
AU  - Lazarević, Luka
AU  - Petrović, Miloš
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4908
AB  - The main aim of conducted research is determination of temperature stresses due to the uneven temperature distribution in CWR. This paper presents a methodology for determination of temperature stresses in CWR based on (1) measurement system developed by the authors for measurement of rail surface temperatures, and (2) coupled transient thermal-stress analysis for simulation of rail temperature field and corresponding stresses. The main advantages of the proposed methodology are high sensitivity to the small temperature variations, taking into account the effect of thermal inertia, as well as measurement of single input parameter rail surface temperature. The obtained experimental results showed lower rail temperatures in sleeper zones and rail foot along CWR, which emphasize the effect of heat transfer between rail and sleeper, as well as rail foot and ballast. These effects of heat transfer directly influence the decrease of temperature stresses in the mentioned zones of CWR. The maximum values of simulated temperature stresses are up to 16% less in the centre of gravity of railhead, up to 9.8% less in the centre of gravity of rail foot, and up to 0.2% less in the centre of gravity of rail web, compared to the common engineering calculation. In addition, the maximum value of simulated temperature force, based on temperature stresses in the rail cross-section, was up to 5.3% less than the value obtained in the common engineering calculation.
T2  - Construction and Building Materials
T1  - Determination of temperature stresses in CWR based on measured rail surface temperatures
VL  - 284
DO  - 10.1016/j.conbuildmat.2021.122713
ER  - 

@article{
author = "Mirković, Nikola and Brajović, Ljiljana and Popović, Zdenka and Todorović, Goran and Lazarević, Luka and Petrović, Miloš",
year = "2021",
abstract = "The main aim of conducted research is determination of temperature stresses due to the uneven temperature distribution in CWR. This paper presents a methodology for determination of temperature stresses in CWR based on (1) measurement system developed by the authors for measurement of rail surface temperatures, and (2) coupled transient thermal-stress analysis for simulation of rail temperature field and corresponding stresses. The main advantages of the proposed methodology are high sensitivity to the small temperature variations, taking into account the effect of thermal inertia, as well as measurement of single input parameter rail surface temperature. The obtained experimental results showed lower rail temperatures in sleeper zones and rail foot along CWR, which emphasize the effect of heat transfer between rail and sleeper, as well as rail foot and ballast. These effects of heat transfer directly influence the decrease of temperature stresses in the mentioned zones of CWR. The maximum values of simulated temperature stresses are up to 16% less in the centre of gravity of railhead, up to 9.8% less in the centre of gravity of rail foot, and up to 0.2% less in the centre of gravity of rail web, compared to the common engineering calculation. In addition, the maximum value of simulated temperature force, based on temperature stresses in the rail cross-section, was up to 5.3% less than the value obtained in the common engineering calculation.",
journal = "Construction and Building Materials",
title = "Determination of temperature stresses in CWR based on measured rail surface temperatures",
volume = "284",
doi = "10.1016/j.conbuildmat.2021.122713"
}

Mirković, N., Brajović, L., Popović, Z., Todorović, G., Lazarević, L.,& Petrović, M.. (2021). Determination of temperature stresses in CWR based on measured rail surface temperatures. in Construction and Building Materials, 284.
https://doi.org/10.1016/j.conbuildmat.2021.122713

Mirković N, Brajović L, Popović Z, Todorović G, Lazarević L, Petrović M. Determination of temperature stresses in CWR based on measured rail surface temperatures. in Construction and Building Materials. 2021;284.
doi:10.1016/j.conbuildmat.2021.122713 .

Mirković, Nikola, Brajović, Ljiljana, Popović, Zdenka, Todorović, Goran, Lazarević, Luka, Petrović, Miloš, "Determination of temperature stresses in CWR based on measured rail surface temperatures" in Construction and Building Materials, 284 (2021),
https://doi.org/10.1016/j.conbuildmat.2021.122713 . .

TY  - JOUR
AU  - Mirković, N.
AU  - Brajović, Ljiljana
AU  - Malović, Miodrag
AU  - Vnenk, P.
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4565
AB  - Continuously welded rails are a part of the track structure since the 1950s. Total stresses in continuously welded rails include residual stresses generated during the manufacturing process as well as the service life of rails. The control of rail stresses is very important for traffic safety. Measurement methods for residual stress in rails are presented in this paper. Since destructive measurement methods are unsuitable for use in the railway track, the modern non-destructive methods were particularly presented and discussed. The advantages and disadvantages of X-ray diffraction, ultrasonic, magnetic and electromagnetic methods are particularly explained and considered.
PB  - 20th International Scientific Conference on Energy Management of Municipal Facilities and Sustainable Energy Technologies, EMMFT 2018
T2  - Advances in Intelligent Systems and Computing
T1  - Measurement methods for residual stresses in CWR
EP  - 355
SP  - 346
VL  - 982
DO  - 10.1007/978-3-030-19756-8_32
ER  - 

@article{
author = "Mirković, N. and Brajović, Ljiljana and Malović, Miodrag and Vnenk, P.",
year = "2020",
abstract = "Continuously welded rails are a part of the track structure since the 1950s. Total stresses in continuously welded rails include residual stresses generated during the manufacturing process as well as the service life of rails. The control of rail stresses is very important for traffic safety. Measurement methods for residual stress in rails are presented in this paper. Since destructive measurement methods are unsuitable for use in the railway track, the modern non-destructive methods were particularly presented and discussed. The advantages and disadvantages of X-ray diffraction, ultrasonic, magnetic and electromagnetic methods are particularly explained and considered.",
publisher = "20th International Scientific Conference on Energy Management of Municipal Facilities and Sustainable Energy Technologies, EMMFT 2018",
journal = "Advances in Intelligent Systems and Computing",
title = "Measurement methods for residual stresses in CWR",
pages = "355-346",
volume = "982",
doi = "10.1007/978-3-030-19756-8_32"
}

Mirković, N., Brajović, L., Malović, M.,& Vnenk, P.. (2020). Measurement methods for residual stresses in CWR. in Advances in Intelligent Systems and Computing
20th International Scientific Conference on Energy Management of Municipal Facilities and Sustainable Energy Technologies, EMMFT 2018., 982, 346-355.
https://doi.org/10.1007/978-3-030-19756-8_32

Mirković N, Brajović L, Malović M, Vnenk P. Measurement methods for residual stresses in CWR. in Advances in Intelligent Systems and Computing. 2020;982:346-355.
doi:10.1007/978-3-030-19756-8_32 .

Mirković, N., Brajović, Ljiljana, Malović, Miodrag, Vnenk, P., "Measurement methods for residual stresses in CWR" in Advances in Intelligent Systems and Computing, 982 (2020):346-355,
https://doi.org/10.1007/978-3-030-19756-8_32 . .

TY  - CONF
AU  - Mirković, Nikola
AU  - Brajović, Ljiljana
AU  - Malović, Miodrag
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3764
AB  - The residual stresses in rails are generated during the manufacturing process and have uneven distribution in rail cross section. The residual stress is a part of basic tensile stress in rail foot. For used rail, the residual stress value of 80 MPa is commonly used in the engineering calculations. On the other hand, the standard EN 13674 prescribes residual stress values up to 250 MPa and destructive method using electrical strain gauge for measurement of rail residual stress. Since destructive measurement methods are unsuitable for use in the track, the possible non-destructive in situ methods for measuring of residual stresses in the rails are discussed in this paper. The fundamentals of X-ray diffraction, ultrasonic, magnetic and electromagnetic methods are explained, as well as, their advantages and disadvantages.
PB  - Faculty of Mechanical Engineering, Niš
C3  - Proceedings / XVIII Scientific-expert conference on railways - RAILCON 18, october 11-12, 2018, Niš
T1  - Methods for determination of residual stress in rail
EP  - 116
SP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3764
ER  - 

@conference{
author = "Mirković, Nikola and Brajović, Ljiljana and Malović, Miodrag",
year = "2018",
abstract = "The residual stresses in rails are generated during the manufacturing process and have uneven distribution in rail cross section. The residual stress is a part of basic tensile stress in rail foot. For used rail, the residual stress value of 80 MPa is commonly used in the engineering calculations. On the other hand, the standard EN 13674 prescribes residual stress values up to 250 MPa and destructive method using electrical strain gauge for measurement of rail residual stress. Since destructive measurement methods are unsuitable for use in the track, the possible non-destructive in situ methods for measuring of residual stresses in the rails are discussed in this paper. The fundamentals of X-ray diffraction, ultrasonic, magnetic and electromagnetic methods are explained, as well as, their advantages and disadvantages.",
publisher = "Faculty of Mechanical Engineering, Niš",
journal = "Proceedings / XVIII Scientific-expert conference on railways - RAILCON 18, october 11-12, 2018, Niš",
title = "Methods for determination of residual stress in rail",
pages = "116-113",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3764"
}

Mirković, N., Brajović, L.,& Malović, M.. (2018). Methods for determination of residual stress in rail. in Proceedings / XVIII Scientific-expert conference on railways - RAILCON 18, october 11-12, 2018, Niš
Faculty of Mechanical Engineering, Niš., 113-116.
https://hdl.handle.net/21.15107/rcub_technorep_3764

Mirković N, Brajović L, Malović M. Methods for determination of residual stress in rail. in Proceedings / XVIII Scientific-expert conference on railways - RAILCON 18, october 11-12, 2018, Niš. 2018;:113-116.
https://hdl.handle.net/21.15107/rcub_technorep_3764 .

Mirković, Nikola, Brajović, Ljiljana, Malović, Miodrag, "Methods for determination of residual stress in rail" in Proceedings / XVIII Scientific-expert conference on railways - RAILCON 18, october 11-12, 2018, Niš (2018):113-116,
https://hdl.handle.net/21.15107/rcub_technorep_3764 .

TY  - JOUR
AU  - Brajović, Ljiljana
AU  - Malović, Miodrag
AU  - Popović, Zdenka
AU  - Lazarević, Luka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2583
AB  - This paper describes testing of a wireless technique for measuring the actual sleeper vibrations and determination of their dynamic deflection based on the experimentally acquired acceleration data. Practical measurements of sleeper vibrations and calculation of displacements (deflections) along the track provide insight into the actual condition of layers below sleepers. The main goal was to develop the equipment for structural health monitoring as a basis for the track maintenance management.
T2  - Communications - Scientific Letters of the University of Zilina
T1  - Wireless system for sleeper vibrations measurement
EP  - 26
IS  - 4
SP  - 21
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2583
ER  - 

@article{
author = "Brajović, Ljiljana and Malović, Miodrag and Popović, Zdenka and Lazarević, Luka",
year = "2014",
abstract = "This paper describes testing of a wireless technique for measuring the actual sleeper vibrations and determination of their dynamic deflection based on the experimentally acquired acceleration data. Practical measurements of sleeper vibrations and calculation of displacements (deflections) along the track provide insight into the actual condition of layers below sleepers. The main goal was to develop the equipment for structural health monitoring as a basis for the track maintenance management.",
journal = "Communications - Scientific Letters of the University of Zilina",
title = "Wireless system for sleeper vibrations measurement",
pages = "26-21",
number = "4",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2583"
}

Brajović, L., Malović, M., Popović, Z.,& Lazarević, L.. (2014). Wireless system for sleeper vibrations measurement. in Communications - Scientific Letters of the University of Zilina, 16(4), 21-26.
https://hdl.handle.net/21.15107/rcub_technorep_2583

Brajović L, Malović M, Popović Z, Lazarević L. Wireless system for sleeper vibrations measurement. in Communications - Scientific Letters of the University of Zilina. 2014;16(4):21-26.
https://hdl.handle.net/21.15107/rcub_technorep_2583 .

Brajović, Ljiljana, Malović, Miodrag, Popović, Zdenka, Lazarević, Luka, "Wireless system for sleeper vibrations measurement" in Communications - Scientific Letters of the University of Zilina, 16, no. 4 (2014):21-26,
https://hdl.handle.net/21.15107/rcub_technorep_2583 .