Failure analysis of simple overlap bonding joints and numerical investigation of the adhered tip geometry effect on the joint strength

Abstract

This study was carried out in two stages. In the first step, a numerical study was performed to verify the previous experimental study. In accordance with the previous experimental study data, single lap joints models were created using the ANSYS finite element analysis program. Then, nonlinear stress and failure analyses were performed by applying the failure loads obtained in the experimental study. The maximum stress theory was used to find finite element failure loads of the single lap joints models. As a result of the finite element analysis, an approximate 80 % agreement was found between experimental and numerical results. In the second step of the study, in order to increase the bond strength, different overlap end geometry models were produced and peel and shear stresses in the adhesive layer were compared according to the reference model. As a result of the analyses, significant strength increases were calculated according to the reference model. The strength increase in model 3 and model 5 was found to be 80 % and 67 %, respectively, relative to the reference model.

Experimental Investigation of the Effect of Curing Pressure on Strength of Single Lap Adhesive Joints

“…Adhesive joints are widely used for joining due to their superior properties such as distributing the load over a wider area than the other connection types, not requiring holes, obtaining lightweight structures and having superior fatigue resistance [1]. Some of the factors affecting the performance of the bonded joints are; surface treatments applied to the bonded materials, the ambient temperature in which the adhesive joint is employed, the residual thermal stresses owing to the difference in the thermal expansion coefficient of the adhesive and the bonded materials, curing conditions, particles reinforcement to adhesive and joint geometry [2][3].…”