Total stress field method for fatigue life prediction of finite residual thickness/width notched specimen under tensile load

Abstract

The notch stress fields in current studies are mainly not affected by the residual thickness/width at notch root. The Theory of Critical Distances (TCD) has been widely applied in notch fatigue analysis. However, fatigue tensile experiment results show that TCD has limitation in surface-notched specimens with finite residual thickness and side-notched specimens with finite residual width. Under the assumption that the total stress field should be considered in determining the effective stress σeff, we proposed the total stress field method (TSFM). It has advantages in prediction accuracy and convenience of finite residual thickness/width notched specimen (FRT/WNS).