A Method of Strength Evaluation for Adhesive Joints of Laminated Thin Sheet Metals.

Abstract

The strength of adhesive joints of laminated thin sheet metals under tensile loading was investigated both analytically and experimentally. Aluminum alloy, brass and carbon steel were used for the adherends and epoxy resin for the adhesive. The stress and strain distributions of the joints were analyzed by the elastic finite element method on the assumption of a plane strain state. Their validity was confirmed by the experiments. The initial failure strength of the joints was evaluated by applying each strength criterion to the adherends, adhesive and their interfaces respectively. The stress redistributions after initial cracking were computed to predict the final fracture strength of the joints. The final fracture strength increased according to Young's modulus that of the inner lamina material became higher and that of the outer lamina material became lower.