A Comparative Evaluation of Numerical and Analytical Solutions to the Biadhesive Single-Lap Joint

Abstract

This paper attempts to address the detailed verification of Zhao’s analytical solution including the moment effect with the two- and three-dimensional finite element results. Zhao compared the analytical results with only the 2D FEA results and used the constant bond-length ratio for the biadhesive bondline. In this study, overlap surfaces of the adherends and the adhesives were modelled using surface-to-surface contact elements. Both analytical and numerical analyses were performed using four different biadhesive bondline configurations. The 3D FEA results reveal the existence of complex stress state at the overlap ends. However, the general results show that analytical and numerical results were in a good agreement.

Introductory Chapter: Structural Adhesive Bonded Joints

“…The earliest study on the bi-adhesive joints was performed by Raphael [13]. Özer and Öz [24,25] performed numerical studies to investigate the state of stress in the bi-adhesive bondline. In their other study [26], they also performed an experimental study to assess the efect of a bi-adhesive bondline on the failure load of both mono-and bi-adhesive SLJs.…”

The influence of notching and mixed-adhesives at the bonding area on the strength and stress distribution of dissimilar single-lap joints

“…Therefore, Single-lap joints have received considerably more attention by researchers to develop novel approaches to reduce stresses at the ends of overlap. Several techniques have been suggested [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] to increase the overall strength of the SLJ that can be categorised into two major groups: geometrical and material modifications.…”

“…Their results present excellent optimal cases when the best compromise exists between the weight and strength of the joint. The improper ratio of stiff and flexible adhesive in the mixed-adhesive bond-line alter peel stress from compressive to tensile, which leads to a secondary peak in the peel stress distribution [19].…”