Reduction of intensity of singular stress field at interface end in lap joint

Abstract

It is important to reduce the singular stress at the interface edges to ensure high reliability of the adhesive bonding. In this study, a suitable shape of a semi-circular notch near the interface end is considered in order to improve the adhesive strength of single lap joint. From the FEM analysis, it is found that the intensity of the singular stress field at the interface end can be reduced about 20% due to the additional semi-circular notch.