Research Article
Crack Initiation Criteria and Fracture Simulation for Precracked Sandstones
Table 2
Numerical parameters for analysis.
| Material | Elastic modulus E (GPa) | Friction coefficient u | Poisson’s ratio | (N/mm) | (N/mm) | | Maximum nominal stress of type I failure (MPa) | Maximum nominal stress of type II failure (MPa) | Maximum nominal stress of type III failure (MPa) |
| Brittle material | 1.354 | 0.12 | 0.21 | 0.62 | 0.76 | 1.0 | 6.63 | 8.09 | 8.09 |
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