A precise and efficient analytical method to obtain two distinct intensities of singular stress fields for single lap joint

Abstract

In this paper, a precise and efficient method is proposed for the analysis of the intensity of the singular stress field (ISSF) for single lap joints (SLJs). The analysis method focuses on the FEM stress value at the interface end by applying the same FEM mesh pattern to the unknown and reference models. Previous analysis showed that accurate ISSFs can be obtained for butt joints mesh-independently. In this paper, we analyze SLJs having two distinct singular stress fields by separating the FEM stress into two values corresponding to the two ISSFs. We confirm that our method can provide the ISSFs accurately and efficiently even for the difficult cases when the singular index is nearly equal to 1.