Abstract To recognize the crack initiation life of a corrugated rail surface after quenching, the explicit finite element model referring to real condition is developed for precise frictional rolling contact solutions considering selective quenching. This takes rail profile evolution and the nonlinear material model used for quenching effect into account. Then the simulation results combined with the fatigue model is integrated for the crack initiation life after quenching, the crack initiation on edge of quenching region is mainly caused by the wheel-rail impact induced by irregularities, which is formed by discontinuous material characteristic between quenching and matrix material. Based on this, the most critically susceptible position to crack and number of cycles are predicted, the simulated results are verified through comparison with quenching rail in service.

中文翻译：

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考虑层流等离子淬火技术的钢轨表面裂纹萌生数值研究

摘要 为了识别波纹钢轨表面淬火后的裂纹萌生寿命，建立了参考实际条件的显式有限元模型，用于考虑选择性淬火的摩擦滚动接触精确解。这将钢轨轮廓演变和用于淬火效应的非线性材料模型考虑在内。然后结合疲劳模型对淬火后裂纹萌生寿命的模拟结果进行积分，淬火区域边缘的裂纹萌生主要是由不规则引起的轮轨冲击引起的，这是由淬火和淬火之间的不连续材料特性形成的。基质材料。在此基础上，预测最容易发生裂纹的位置和循环次数，