基于损伤力学的轴承钢旋弯疲劳寿命预测

This paper proposes a fatigue damage evolution model and numerical calculation method based on the theory of continuum damage mechanics, taking into account the effects of vacuum chemical heat treatment. Rotating bending fatigue damage analysis and life prediction are performed for M50NiL bearing steel. First, the constitutive model, the fatigue damage evolution equation and the material parameter calibration method in the theoretical model are presented. Second, based on the ABAQUS platform, the damage mechanics finite element numerical method for fatigue damage analysis considering the influence of the hardened layer is implemented by the UMAT subroutine. After that, the rotating bending fatigue experiments are conducted for the untreated, carburized, and carbonitrided M50NiL bearing steel, and the effect of the heat treatment process on fatigue properties is analyzed. Finally, the rotational bending fatigue life of M50NiL bearing steel is predicted using the suggested fatigue damage model and numerical approach, and the experimental findings validate the applicability of the proposed method.