Adhesive strength evaluation of scarf joint based on the intensity of singular stress field (ISSF)

Abstract

The previous study shows the adhesive strength can be expressed as a constant value of the critical ISSF (Intensity of Singular Stress Field) for butt joints. This study deals with the scarf joint considering two ISSFs corresponding to two distinct singular stress fields. How to evaluate the scarf joint strength is described in comparison with the lap joint having similar two ISSFs. The debonding strength for scarf joints and lap joints can be predicted by the critical ISSF K_σc,λ1 the singular stress σ_θc(10μm).