Modelling of wheel-rail impact-like interaction at crossing panel

Abstract (2015)

Authors

Z. Wei Railway Engineering -

C. Shen Railway Engineering -

Z. Li Railway Engineering -

R.P.B.J. Dollevoet Railway Engineering -

Research Group

Railway Engineering () (TU Delft)

Finite element modelling Impact; railway crossing Rail degradation Wheel/rail interaction

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Published Date

2015

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Railway Engineering

Abstract

In this paper, a finite element model is presented to investigate the wheel-rail impact-like interaction at crossing panel. Compared to existing work, the focus is on the accurate solution of the tangential contact problem, in an effort to obtain realistic stress and strain. Plastic deformation of the wheelset and the rail is accounted for, and the evolution of frictional rolling contact with respect to adhesion-slip regions, pressure, surface shear traction and micro-slip is elaborated during the impact. It is found that the variations of the pressure and surface shear traction from the closure rail to the wing rail are not synchronous; this could contribute to the non-proportional loading in the materials. Besides, the frictional contact upon the impact inherently contains high frequency vibrations, thus resulting in the cyclic loading on the local areas of the contact patch. The model can be applied to failure analysis and profile and structure optimization of crossings.