如何计算Fracture Toughness
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Fracture toughness (K_IC) is resistance to crack propagation: higher means harder to break even with flaws.
分步指南
- 1Input material properties and defect size
- 2Calculate stress intensity factor
- 3Determine fracture criterion
例题解析
输入
Steel K_IC ≈ 100 MPa√m (tough)
结果
vs. Ceramic K_IC ≈ 5 MPa√m (brittle)
常见错误注意事项
- ✕Confusing toughness with strength
- ✕Not accounting for stress concentration
常见问题
Why do ceramics have low toughness?
No crack blunting mechanism; brittle failure from small flaws.
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