An analysis of stresses evaluation efficacy in adhesive single-lap joints

In this paper, at first stress distribution in a single-lap joint between composite laminates by first order shear deformation theory with and without the presence of longitudinal strain has been evaluated. Adhesive layer supposed to be isotropic and adherents assumed to be orthotropic laminates. A new improved method of displacement theory has been used to determine stresses distribution. The results of this analytical solution have been compared by the results of finite element and it has been revealed that both methods have similar results. The advantage of this new method compared to classic method is that it has a higher Compatibility by finite element results. In shear stress there is no significant improvement. In the other hand it has been declared that the method has assumed length strain in adhesive layer has a higher accuracy in its results. In shear stress distribution, considering of length strain has no significant benefit, but in peeling stress this difference will improve the results significantly.