Moving eccentric crack in a piezoelectric strip bonded To elastic materials

摘要

The steady-state of a propagation accentric crack in a piezoelectric ceramic strip Bonded between two elastic materials under combined anti-plane mechanical shear and in- Plane electrical loadings is considered in this paper. The analysis based o n the integral Transform approach is conducted on the permeable crack condition. Field intensity factors and Energy release rate are obtained in terms of a Fredholm integral equation of the second kind. It Is shown for this geometry that the crack propagation speed has influence on the dynamic Energy release rate. The initial crack branching angle for a PZT-5H piezoceramic structure is Predicted by the maximum energy release rate criterion.