J-integral Evaluation for an Interface Crack Using Digital Image Correlation

Abstract

A method for evaluating J-integral for a bi-material interface crack from displacement fields obtained through the measurement using digital image correlation is proposed in this paper. The effectiveness of the proposed method is demonstrated by applying to the displacement fields obtained from elasto-plastic finite element analysis, and the measured displacement fields of specimens with various crack lengths and interfacial strengths. Results show that the proposed method is useful for evaluating the J-integral for an interface crack.