A simple and convenient fatigue analysis method considering the effect of plasticity on fatigue

Abstract

Continued plastic accumulation at the notch location changes the stress distribution of the notch, causing the position of the maximum stress gradient to change. In this study,a method for analyzing notch fatigue combining maximum notch stress and the relative stress gradient at the location of yield stress was developed. Experimental data on various materials are applied for model validation and comparison. The results show that the prediction accuracy of the proposed model is significantly better than that of the classical fatigue analysis method, and has the same prediction accuracy as the line method of the critical distance theory.