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G. Schnalzger¹, S. Gapp¹, U. Ossberger², C. Bucher², T. Antretter³ and W. Daves¹

¹Materials Center Leoben Forschung GmbH, Leoben, Austria
²Voestalpine Railway Systems GmbH, Zeltweg, Austria
³Montanuniversität Leoben, Institute of Mechanics, Leoben, Austria

doi:10.4203/ccc.1.5.9

G. Schnalzger, S. Gapp, U. Ossberger, C. Bucher, T. Antretter, W. Daves, "Wear and RCF assessment in switch rails for different materials", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 5.9, 2022, doi:10.4203/ccc.1.5.9

Keywords: switches and crossings, rolling contact fatigue, wear, finite element analysis.

Abstract

Switch rails are severely loaded components in the railway turnout. This work presents a numerical framework to assess the wear and rolling contact fatigue (RCF) for two different pearlitic switch rail materials. Firstly, a cyclic finite element analysis (FEA) is performed calculating the local loads during the first contact of different wheels on the switch rail. Secondly, local wear and RCF models for the investigated steel grades R350HT and 400 UHC® HSH® are determined and their output is visualized in damage maps. After that, the local contact parameters maximum contact pressure, creepage and contact length are extracted from the FEA considering these different wheel profiles and different rail materials. The calculations deliver local contact loads on the switch surface, which are marked in the damage maps. This allows the comparison of R350HT and 400 UHC in relation to their damage susceptibility. Both show a very similar damage response to the contact loading in the switch rail. Wear and surface RCF are the dominating damage patterns. Subsurface RCF is only predicted for some local cases. In total, 400 UHC® HSH® exhibits a higher resistance against wear and RCF. Regarding the wheel types, the worn wheels are identified as most critical for the damage in the switch rail.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 5.9 Wear and RCF assessment in switch rails for different materials G. Schnalzger¹, S. Gapp¹, U. Ossberger², C. Bucher², T. Antretter³ and W. Daves¹ ¹Materials Center Leoben Forschung GmbH, Leoben, Austria ²Voestalpine Railway Systems GmbH, Zeltweg, Austria ³Montanuniversität Leoben, Institute of Mechanics, Leoben, Austria doi:10.4203/ccc.1.5.9 Full Bibliographic Reference for this paper G. Schnalzger, S. Gapp, U. Ossberger, C. Bucher, T. Antretter, W. Daves, "Wear and RCF assessment in switch rails for different materials", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 5.9, 2022, doi:10.4203/ccc.1.5.9 Keywords: switches and crossings, rolling contact fatigue, wear, finite element analysis. Abstract Switch rails are severely loaded components in the railway turnout. This work presents a numerical framework to assess the wear and rolling contact fatigue (RCF) for two different pearlitic switch rail materials. Firstly, a cyclic finite element analysis (FEA) is performed calculating the local loads during the first contact of different wheels on the switch rail. Secondly, local wear and RCF models for the investigated steel grades R350HT and 400 UHC® HSH® are determined and their output is visualized in damage maps. After that, the local contact parameters maximum contact pressure, creepage and contact length are extracted from the FEA considering these different wheel profiles and different rail materials. The calculations deliver local contact loads on the switch surface, which are marked in the damage maps. This allows the comparison of R350HT and 400 UHC in relation to their damage susceptibility. Both show a very similar damage response to the contact loading in the switch rail. Wear and surface RCF are the dominating damage patterns. Subsurface RCF is only predicted for some local cases. In total, 400 UHC® HSH® exhibits a higher resistance against wear and RCF. Regarding the wheel types, the worn wheels are identified as most critical for the damage in the switch rail. download the full-text of this paper (PDF, 1155 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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