Two-Dimensional Stress Analysis of Single-Lap Joints of Dissimilar Adherends Subjected to External Bending Moments

The stress distributions of single-lap adhesive joints of dissimilar adherends subjected to external bending moments are analyzed as a three-body contact problem by using a two-dimensional theory of elasticity (plain strain). In the analysis, dissimilar adherends and an adhesive are replaced by finite strips, respectively. In the numerical calculations, the effects of Young’s modulus ratio, adherend thickness ratio and adherend length ratio on the stress distribution at the interface are examined. As the results, it is seen that the stress singularity occurs at the edges of the interfaces and it increases at the edge of the interface of adherend with greater Young’s modulus It is noticed that the singular stress decreases at the edge of the interface of adherend with larger adherend thickness. Strain measurements on adherends were conducted. A fairly good agreement is seen between the analytical and the measured results.