To predict fatigue life more accurately, we consider the relationship between static toughness and fatigue toughness in fatigue failure process, the numerical model of total dissipated plastic strain energy (TDPSE) and fatigue life is established. And considering the effect of surface roughness and surface processing coefficient on fatigue life, the life prediction method of TDPSE is modified. In addition, the fatigue life of Non-Masing and Masing materials are predicted by TDPSE and modified TDPSE method, respectively. Compared with TDPSE method, the life estimated by the modified TDPSE method are closer to the test results, and the modified TDPSE method lays a technical foundation for the development of mechanical components.

为了更准确地预测疲劳寿命，我们考虑了疲劳破坏过程中静态韧性与疲劳韧性之间的关系，建立了总耗散塑性应变能（TDPSE）与疲劳寿命的数值模型。并考虑表面粗糙度和表面加工系数对疲劳寿命的影响，修改了TDPSE的寿命预测方法。此外，Non-Masing 和 Masing 材料的疲劳寿命分别通过 TDPSE 和改进的 TDPSE 方法预测。与 TDPSE 法相比，改进型 TDPSE 法估算的寿命更接近于试验结果，改进型 TDPSE 法为机械部件的研制奠定了技术基础。