Abstract
An analytical model based upon electric field saturation concept along the crack front is proposed in an attempt to predict the fracture of piezoelectric materials containing conducting cracks. Firstly, linear piezoelectroelasticity solution is obtained to show the singularity of the electric field near the crack tips. Then an electrically yielding strip near the crack front is proposed. Expressions for the stress intensity factor K and the energy release rate G are obtained in closed-form. Fracture criteria based on the non-linear fracture mechanics parameters K and G are established, which are shown to be equivalent for some special situations. Theoretically predicated fracture loads agree qualitatively with existing experimental observations.
| Original language | English |
|---|---|
| Pages (from-to) | 4337-4347 |
| Number of pages | 11 |
| Journal | International Journal of Solids and Structures |
| Volume | 41 |
| Issue number | 16-17 |
| DOIs | |
| Publication status | Published - 2004 |
Keywords
- cracks
- fracture mechanics
- fractures
- piezoelectricity