Effect of Adhesive Thickness on the Interface of Singular Stress at the Adhesive Dissimilar Joint

Abstract

This paper deals with the singular stress field at the adhesive dissimilar joint, and discusses the effect of material combination and adhesive thickness on the intensity of the singular stress when bonded strip is subjected to tension. A useful method to calculate the intensity of singular stress at the adhesive dissimilar joint is presented with focusing on the stresses at the edge calculated by finite element method. The intensities of singular stress are indicated in charts with varying adhesive thickness t under arbitrary material combinations for adhesive and adherents, and it is found that the intensity of singular stress increases with increasing the adhesive thickness t until t=W , when W is the width of adhesive. The intensity of singular stresses are also charted under arbitrary material combinations which are presented by Dundurs' parametersα , β when t/W = 0.001 and t/W = 0.1 , and it is found that for a fixed value β the intensity of singular stress increases with increasing α when α is small while it decreases with increasing α when α is large.