Multi-linear stress analysis in adhesively bonded double-lap joint

Abstract

In this study, an elastic–plastic stress analysis is carried out in fiber glass-epoxy adherends with DP460 ductile adhesive. Multi-linear plastic solution is applied to the joints. Analytical results are checked using a multi-linear finite element solution, ANSYS 12. Analytical and numerical solutions are found to be in good agreement. The thickness of the adherend is chosen as 1.8 mm, 2.5 mm and 3 mm. It is observed that when the thickness of the adherend is increased, the intensity of the peel stress raises. Shear and peel stresses are found to be the highest at or around the free ends of the adhesive. The multi-linear solution yields a closer solution with respect to the bilinear solution since it follows the stress–strain diagram.

Micromechanical analysis for microscopic damage initiation in fiber/epoxy composite during interference-fit pin installation

“…Cross-section planar model through thickness is often used to investigate delamination of Z-pinned laminates [37,38], adhesively bonded joint [39,40] and cylindrical contact problem [41]. The cross-section through thickness is a plane with zero thickness extracted from xz plane for 0°-lamina of CFRP laminate interference-fit joint along y direction.…”