Abstract
Considering the influence of the domain switching near the tip of a crack and applying the idea of multiscale singularity fields in piezoelectric fracture, we have obtained an empirical criterion for the crack closure. Based on the domain switching in the electric yield region, referring to Yang's results on the small scale yield model for the electrical fatigue crack, a model of the crack closure during electric-field-induced fatigue is developed to analyze the crack growth. In terms of the model we have obtained the formula of the rate of the crack growth under cyclic electric loading. Finally we compare the theoretical predictions with the results given by Cao and Evans experimentally. It should be pointed out that the model proposed is empirical and needs to be verified by more experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 41-46 |
| Number of pages | 6 |
| Journal | Acta Mechanica Solida Sinica |
| Volume | 16 |
| Issue number | 1 |
| Publication status | Published - Mar 2003 |
| Externally published | Yes |
Keywords
- Crack closure
- Domain switching
- Electric fatigue