A two-dimensional ordinary state-based peridynamic model for surface fatigue crack propagation in railheads
Xiaochuan Ma (East China Jiaotong University)
L. Wang (TU Delft - Railway Engineering)
Jinhui Xu (East China Jiaotong University)
Qingsong Feng (East China Jiaotong University)
Linya Liu (East China Jiaotong University)
Huapeng Chen (East China Jiaotong University)
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Abstract
Based on ordinary state-based peridynamic theory, a 2D peridynamic model has been established to investigate fatigue crack propagation in railheads. The proposed model is verified in terms of rail deformation under a quasi-static load and the ductile material-related fatigue failure model. Good agreements have been achieved between a finite element model and the experimental results. With the proposed model, the effects of the initial crack angle, initial crack length and wheel-rail friction coefficient on crack propagation in railheads are studied. This research provides a new method for studying crack propagation in railheads.