✦ LIBER ✦
A mixed mode rock fracture model for the prediction of crack path
✍ Scribed by Lewis, R. W.; Koosha, B.
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 182 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0363-9061
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✦ Synopsis
Crack propagation in rocks is simulated by using a displacement substitution method based on a mixed mode fracture criterion. The main advantage of this model is that it can distinguish between mode I and mode II stress intensity factors simultaneously. A typical finite element program is used to compute displacements adjacent to the crack tip. The maximum circumferential tensile stress is adopted as a 'yield surface' for the calculation of the load factor in each crack increment. Pure mode I and mixed mode examples have been analysed to validate the capability of the model.