Numerical procedure for fatigue life prediction for railway turnout crossings using explicit finite element approach

• Published in: Wear Vol. 366-367; pp. 167 - 179
• Main Authors: Xin, L., Markine, V.L., Shevtsov, I.Y.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.11.2016; Elsevier Science Ltd
• Subjects: Computer simulation; Contact force; Contact stresses; Crack initiation; Crack propagation; Fatigue failure; Fatigue life; Finite element analysis; Finite element method; Fracture mechanics; Life prediction; Mathematical analysis; Mathematical models; Nose; Railroad crossings; Rails; Rolling contact; Rolling contact fatigue; Simulation; Strain; Three dimensional models; Turnout crossing; Wheelsets; Life prediction; Rolling contact fatigue; Turnout crossing; Crack initiation
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2016.04.016

In this paper a numerical procedure for analysis of rolling contact fatigue crack initiation and fatigue life prediction for the railway turnout crossing is presented. To analyse wheel–rail interaction, a three-dimensional explicit finite element (FE) model of a wheelset passing a turnout crossing is developed to obtain the dynamic responses such as the contact forces, displacements and accelerations as well as the stresses and strain in the crossing nose. The material model accounting for elastic–plastic isotropic and kinematic hardening effects in rails is adopted. The fatigue life of the rails is defined as the time to rolling contact fatigue crack initiation. In predicting the fatigue life Jiang and Sehitoglu model is used, which is based on the critical plane approach. Using the FE simulation results the ten critical locations on the crossing nose susceptible to crack initiation are determined first. Then, using the fatigue model the critical planes in these locations are obtained and the number of cycles to fatigue crack initiation is calculated for each location, based on which the most decisive location and the crossing life is determined. The results of the numerical simulations are presented and discussed. •A numerical procedure for predicting the fatigue life of a turnout crossing is presented.•The 3D dynamic explicit finite element model of the wheelset-crossing impact is used.•Jiang and Sehitoglu fatigue model is employed to predict crack plane and fatigue life.•The fatigue life of the crossing is determined by the impact position.•This procedure can be used for assessment of various crossing designs.