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.
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