The Effect of the Ratio of Joints Diameter, Corner Radius of edge and Adhesive Thickness on the Strength of Adhesive Joints

Abstract

The present studies focused how large effects of the ratio of joints diameter, edge’s corner radius and adhesive thickness on the tensile strength of adhesive joints was studied. Finite element analysis and the corresponding experiments of butt joints with adhesive surface edge with round corner were conducted to study the above-mentioned effects. The calculated results showed a constant value of strength of adhesive joints with round corner edge on condition that the ratio of round bar diameter to adhesive thickness and the round bar corner to adhesive thickness were constant. While the experimental results of the tensile strength decreased with the increase of adhesive thickness, the experimental results showed the good agreements with the estimated strength calculated by FEM in the case of applying an appropriate adhesive thickness. It should be noted that it is important to control the adhesive thickness of butt joint for the strength of the adhesive.