Fatigue analysis of railway wheel using a multiaxial strain-based critical-plane index
作者： M. Kiani , G.T. Fry
DOI: 10.1111/FFE.12697
关键词:
摘要: A fatigue damage model to assess the development of subsurface cracks in railway wheels is presented this paper. 3-dimensional finite element (FEM) constructed simulate repeated cycles contact loading between a wheel and rail. The computational approach includes hard-contact over-closure relationship an elastoplastic material with isotropic kinematic hardening. Results from simulation are used multiaxial critical-plane analysis. employed strain-based based on Fatemi-Socie index that takes into account non-proportional out-of-phase nature state stress occurs when rolls It predicts fatigue-induced micro-crack nucleation at depth about 3.7 mm beneath tread, as well crack plane growth orientation which indicates possible failure pattern. Additionally, influence various factors such contribution normal stresses, higher load, have been investigated.
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