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C. He, Z. Yang, P. Zhang, S. Li, M. Naeimi, Z. Li, "A finite element thermomechanical study on the development of polygonal wear", 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 21.18, 2022, doi:10.4203/ccc.1.21.18

Keywords: polygonal wear, 3D-finite element, vehicle-track, dynamic modeling, thermal effect, wheel-rail contact, contact pressure, wear development.

Abstract

Polygonal wear is a common type of damage on the railway wheel tread, which could induce wheel-rail impacts and further components failure. This study investigates the dynamic interactions between a polygonal wheel and a smooth rail with a finite element (FE) thermomechanical model. To analyze the influence of the thermal effect on wheel-rail contact pressure and wear depth, different material properties (i.e., elastic, thermal-elastic, elasto-plastic and thermo-elasto-plastic) are employed in the FE simulations. The results indicate that elasto-plastic material property should be considered in the polygonal wear study because the wear depth near the crest of the polygonal profile can be overestimated by using the elastic models. Thermal softening in the FE model may increase the contact pressure and the wear depth, which should also be involved to accurately predict the evolution of the worn profile along the wheel circumference. This study contributes to the prediction of polygonal wear development and provides some new insights into the mechanism of polygonal wear.

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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 21.18 A finite element thermomechanical study on the development of polygonal wear C. He, Z. Yang, P. Zhang, S. Li, M. Naeimi and Z. Li Section of Railway Engineering, Delft University of Technology Delft, The Netherlands doi:10.4203/ccc.1.21.18 Full Bibliographic Reference for this paper C. He, Z. Yang, P. Zhang, S. Li, M. Naeimi, Z. Li, "A finite element thermomechanical study on the development of polygonal wear", 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 21.18, 2022, doi:10.4203/ccc.1.21.18 Keywords: polygonal wear, 3D-finite element, vehicle-track, dynamic modeling, thermal effect, wheel-rail contact, contact pressure, wear development. Abstract Polygonal wear is a common type of damage on the railway wheel tread, which could induce wheel-rail impacts and further components failure. This study investigates the dynamic interactions between a polygonal wheel and a smooth rail with a finite element (FE) thermomechanical model. To analyze the influence of the thermal effect on wheel-rail contact pressure and wear depth, different material properties (i.e., elastic, thermal-elastic, elasto-plastic and thermo-elasto-plastic) are employed in the FE simulations. The results indicate that elasto-plastic material property should be considered in the polygonal wear study because the wear depth near the crest of the polygonal profile can be overestimated by using the elastic models. Thermal softening in the FE model may increase the contact pressure and the wear depth, which should also be involved to accurately predict the evolution of the worn profile along the wheel circumference. This study contributes to the prediction of polygonal wear development and provides some new insights into the mechanism of polygonal wear. download the full-text of this paper (PDF, 6 pages, 595 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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