Effect of Overlap Length and Adhesive Thickness on Stress Distribution in Adhesive Bonded Single-Lap Joints

Recently, adhesive-bonding technique is widely used in manufacturing structures. Stress and strain analyses of joints are essential to design adhesive-bonded structure. The durability of single-lap adhesive joint is under the influence of the adhesive design of joints. In this study, single-lap specimens with various joint conditions are used for the tensile-shear test and finite element calculation in order to investigate the effect of overlap length and adhesive-bonding thickness on adhesive strength and stress distribution of the joints. Consequently, it is found that overlap size and thickness can be important parameters for design of joint structure using adhesive bonding, which is affected on adhesive strength.