Combined Mode Crack Extension in Adhesive Joints

Abstract

This study investigates crack extension in the adhesive system under combined mode loading. A finite element analysis for a slant edge-cracked plate furnishes the opening and shear mode stress intensity factors, K_I and K_II, over a wide range of slant angles and crack lengths. By varying the angle between the adhesive layer and the load line in a SEN specimen, combined mode crack extension is observed and the combined mode fracture toughness values are then determined. The effect of the location of the crack tip (center of bond or interface) is also discussed.