Print Email Facebook Twitter Residual fatigue life evaluation of rail at squats seeds using 3D explicit finite element analysis Title Residual fatigue life evaluation of rail at squats seeds using 3D explicit finite element analysis Author Deng, X. Naeimi, M. Li, Z. Qian, Z. Faculty Civil Engineering and Geosciences Department Structural Engineering Date 2014-05-26 Abstract A modeling procedure to predict the residual fatigue life of rail at squats seeds is developed in this article. Two models are involved: a 3D explicit Finite Element (FE) model to compute the stress and strain at squats in rail, and the J-S fatigue damage model to determine the residual fatigue life on the basis of the computed stress and strain. In the FE model dynamic effects of wheel-rail system under rolling contact is taken into account. Bilinear isotropic elastic-plastic material properties are adopted to represent the hardening of wheel and rail. Squats are subject to multiple loading cycles. The geometry of the squat is varied in the simulation corresponding to a growing squat at different ages. It is found that small squats lead to fatigue failure while severe ones lead to ratcheting failure. Subject fatique lifefinite element methodrolling contact fatiguecracks initiationrail squats To reference this document use: http://resolver.tudelft.nl/uuid:29f474a4-b081-4a2a-82b9-cb1ad3605433 Publisher DCMat Ageing Centre, Delft University of Technology ISBN 978-94-6186-314-0 Source AMS 14: Proceedings of the 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014 Part of collection Institutional Repository Document type conference paper Rights (c) 2014 The Author(s) Files PDF 312490.pdf 2.07 MB Close viewer /islandora/object/uuid:29f474a4-b081-4a2a-82b9-cb1ad3605433/datastream/OBJ/view