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

• Notch stress field affected by residual thickness/width is studied. • The proposed TSFM improves the prediction accuracy compared to TCD. • TSFM required the elastic stress field of notch and S - N expression. 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 σ eff , 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). [ABSTRACT FROM AUTHOR]