Abstract

The problem of interface crack in the bonded structures has received a great deal of attention in recent years. In this paper the aluminum bonded single lap-joint containing the interface edge crack is investigated. The tensile load and the average shear stress of the adhesive joints which have different crack length are obtained from the static tensile tests. The critical value of crack length to provoke the interface fracture is determined to a/L=0.4, where a is the interface crack length and L is the adhesive lap-length. The fracture mechanical parameters are introduced to confirm the existence of the critical crack length. The compliance and the stress intensity factors are calculated using the displacement and the stress near the interface crack tip by the boundary element method. These numerical results support the experimental results that the critical value of a/L is 0.4. It is known that the compliance and the stress intensity factors are the efficient parameters to estimate the bonded single lap-joint containing the interface edge crack.

Keywords

• Interface Edge Crack;
• Bonded Single Lap-Joint;
• Static Tensile Test;
• Strain;
• Boundary Element Method;
• Compliance;
• Stress Intensity Factor

• 에지계면균열;
• 단순겹치기 접착이음;
• 정적인장실험;
• 변형률;
• 경계요소법;
• 컴플라이언스;
• 응력세기계수;