Effect of Adhesive Thickness on the Intensity of Singular Strength for the Adhesive Joint (Comparison between Bending and Tension)

Abstract

In the previous paper, the authors have discussed the effect of the adhesive thickness and material combinations on the strength of adhesive joint under tension. On the basis of the FEM results, it has been explained explicitly that the strength of adhesive joint decreases with increasing of adhesive thickness under arbitrary material combinations. In this paper, an adhesive joint under bending is discussed using the FEM. Then, the effect of adhesive thickness on the strength of adhesive joint is discussed under bending. Comparing the results of tension and bending for the adhesive joint, it is found that the intensity of singular stress for the bending sometimes is larger than the intensity of singular stress for the tension. On the other hand, the intensity of singular stress for the bending is always smaller than the intensity of singular stress for the tension when the adhesive thickness is large enough.