考虑附加损伤和缺口效应的缺口件多轴疲劳寿命预测模型OA北大核心CSTPCD

To address the issue of significant errors in predicting the multiaxial fatigue life of not-ched components with local stress-strain method,a method for predicting the fatigue life of notched components under multiaxial loading was proposed based on the critical plane theory which toke the stress gradient and size of the notchs and influences of additional strengthening effects into account.The model was validated by experimental data from three different materials of notched specimens,and the prediction results of the proposed model were compared with those of two classic models.The results show that the prediction accuracy of the proposed model is higher than that of the other two models,and the prediction results are almost all within the double life error band.