Abstract
In this paper, several widely applied fracture criteria were first numerically examined and the crack-tip-region J-integral criterion was confirmed to be more applicable to predict fracture angle in an elastic-plastic multiphase material. Then, the crack propagation in an idealized dendritic two-phase Al-7%Si alloy was modeled using an elastic-plastic finite element method. The variation of crack growth driving force with crack extension was also demonstrated. It is found that the crack path is significantly influenced by the presence of α-phase near the crack tip, and the crack growth driving force varies drastically from place to place. Lastly, the simulated fracture path in the two-phase model alloy was compared with the experimentally observed fracture path.
| Original language | English |
|---|---|
| Pages (from-to) | 59-65 |
| Number of pages | 7 |
| Journal | Journal of Materials Science and Technology |
| Volume | 22 |
| Issue number | 1 |
| Publication status | Published - Jan 1 2006 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Polymers and Plastics
- Metals and Alloys
- Materials Chemistry