Analysis of interface crack in piezoelectric materials using extended finite element method

In the present work, static impermeable crack at interface of piezoelectric materials is analyzed using an extended finite element method. An edge crack and center crack at the interface of PZT-5H and PZT-4 for k-class singularity of piezoelectric materials have been analyzed under mechanical and electromechanical loadings. Enrichment functions for k-class are used for determining the asymptotic fields near the crack tip. K-I and K-IV are determined using the interaction integral. The effect on fracture parameters of major crack due to minor cracks, holes, and combination of minor cracks and holes has been investigated. The variation in intensity factors with elastic field and electric displacement has been analyzed.