Two-Dimensional Stress Analysis and the Strength Estimation of Adhesive Butt Joints Under Static Tensile Loadings and Bending Moments

Abstract

This paper deals with a two-dimensional stress analysis of adhesive butt joints under static tensile loading and bending moments in order to contribute to an establishment of the fracture criteria of joints. Similar adherends and an adhesive bond are replaced with finite strips in the analyses. Stress distributions in adhesive joints are analyzed strictly by using the two-dimensional theory of elasticity. The effects of stiffness and thickness of adhesive bonds on the stress distributions at the interfaces are shown by numerical computations. It is found that the stress singularity occurs at the ends of the interfaces. For verification, experiments to measure the strains and the strength were carried out. The analytical results are in fairly good agreement with the experimental ones. In addition, the analytical result is also compared with the result obtained by F.E.M in order to verify the stress distributions at the interfaces. It is shown that are in a fairly good agreement.