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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 213

Simulation of Railway Crossing Damage Due to Welding Defect

L. Xin1, V.L. Markine1 and I.Y. Shevtsov2

1Delft University of Technology, Delft, the Netherlands
2Prorail, Utrecht, the Netherlands

Full Bibliographic Reference for this paper
L. Xin, V.L. Markine, I.Y. Shevtsov, "Simulation of Railway Crossing Damage Due to Welding Defect", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 213, 2014. doi:10.4203/ccp.104.213
Keywords: railway crossing, weld defect, explicit FE model, wheel-rail contact, material model.

Summary
In this paper a local dynamic finite element model is developed to study the crossing nose damages caused by weld defects. During the welding process, a martensitic layer is generated if the material is not heated enough or is cooled down too fast. Cracks are found at the interface of the weld material and the martensitic layer, which will shorten the crossing nose's service life. Several observations and measurements are conducted in the railway network in the Netherlands. This data is used as material properties to simulate different material layers in the model. Contact positions and stress distributions from the impact model are also used as the input for damage investigation. Material responses such as stress and plastic strain distribution can be obtained from the simulation, by which the possible crack initiation location can be detected.

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