The Experimental and Numerical Study on the Mechanical Behaviours of Adhesively Bonded Joints

Abstract

Experimental and numerical analyzes of single lap joints formed by combining AA2024-T3 aluminum alloys with two-component liquid structural adhesive DP410 were carried out in the present study. Tension and four-point bending experiments of single lap joints were performed in the experimental analysis section of this study in addition to 2-D Digital Image Correlation (DIC) analyses performed via the processing of the images obtained during these experiments. Whereas, three dimensional nonlinear finite element analyses of tensile and four point bending of single lap joints were performed for the numerical analysis section of the study by taking into consideration the load and boundary conditions applied during experimental analyses. Normal and shear strain distributions obtained via DIC and finite element method were compared by taking into consideration the middle line of the adhesive layer in the case of tensile and four-point bending loads of single lap joints. As a result of this comparison, it was found that there was a sufficient level of compatibility (not very close agreement) in strain distributions between finite element analyzes and DIC technique. As a result, it can be said that three-dimensional DIC analysis will yield more harmony and more accurate results when it is taken into account that three-dimensional finite element analysis and 2D DIC analysis were performed in the study.