On the Stress Intensity Factor of the Small Interface Edge Crack

(The Effect of Corner Singular Stress Field with Two Singularity Indices)

Abstract

The singular stress field induced at the edge of the interface is determined by the shape and material combination of the interface edge. In the case of lap joints, two different singular stress fields appear depending on the bonding angle. The stress field with two singularity indices λ₁ and λ₂ can be expressed by superposing the different singular terms with λ₁ and λ₂. Therefore, in this study, the stress intensity factors of a small interfacial crack at the interface edge are separated into two components corresponding to the two singularity indices. The dimensionless factors of small interface crack can be obtained by using the result of two different crack dimensions.