Abstract
A peridynamic(PD) fatigue damage-cumulative model is developed to analyze the subsurface crack evolution and fatigue life of rolling contact fatigue(RCF). The compact tension specimens are used to verify the accuracy of the fatigue model. Then a two-dimensional PD numerical model of the contact zone of the rolling bearing is established for RCF analysis. The results show that microcracks are initiated on the subsurface, then branching and coalescing occur in the crack propagation process, and finally some cracks propagate to the surface to form spalling. The microstructural topology, grain interfacial strength and initial flaws affect the crack initiation, propagation and fatigue life. This study helps to understand the mechanism of RCF and provides a reference for predicting RCF.
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