Simulation of Railway Crossing Damage Due to Welding Defect

May 1, 2014 in

Conference Paper


Author
Lizuo Xin

Co-authors
Valeri Markine, Ivan Shevtsov

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Abstract

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.