摘要
Damage in brittle materials is characterized by micro-cracks. Interactions between micro-cracks can not be ignored when crack spacing is small. The influence of interactions on stress intensity factors is analyzed by a Westergaard stress function for collinear cracks arrays. A dynamic damage constitutive model for alumina subjected to uniaxial compression is developed based on the energy equilibrium principle of micro-cracking. A dynamic damage evolution equation was presented. The influence of nucleation parameter, initial length and crack spacing on the dynamic fracture toughness was discussed. The stress-strain curve resulted from our model has a good agreement with the experimental results.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 169-173 |
| 页数 | 5 |
| 期刊 | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| 卷 | 31 |
| 期 | SUPPL.1 |
| 出版状态 | 已出版 - 10月 2011 |