9: Brittle Fracture
- Last updated
Save as PDF
- that materials break by cracking;
- what determines whether a material will crack or not;
- what determines whether cracking is catastrophic or more gradual;
- the concepts of the fracture energy, strain energy release rate, fracture toughness and stress intensity factor.
Before you start
You need not do it now, but you may want to look at the TLP on photoelasticity.
- 9.1: Introduction
- 9.2: When do atomic bonds break?
- 9.3: Why do cracks weaken a material?
- 9.4: Inglis and the crack tip stress idea
- 9.5: Can we calculate the energy changes?
- 9.6: What about tension?
- 9.7: Another way of expressing the energies
- 9.8: Another way of calculating the energies
- 9.8: Why bother if they are the same?
- 9.9: Coping with a scatter in strength
- 9.10: When does the sample fail completely?
- 9.11: Sub-critical crack growth and R-curves
- 9.12: Summary
- 9.13: Questions