Research Article
Discrete Element Modeling of Crack Initiation Stress of Marble Based on Griffith’s Strength Theory
Table 5
Values of 
, , and 
 under different confining pressures.
| | 
 |  | Confining pressure (MPa) | 0 | 1 | 5 | 10 | 20 | 30 | 40 | 50 |  | 
 |  | (×10−4) | 9.5 | 10.3 | 13.1 | 15.6 | 16.2 | 17.8 | 19.5 | 21.2 |  | (×10−4) | 2.7 | 3.1 | 4.3 | 6.0 | 6.5 | 7.3 | 8.0 | 9.0 |  |  | 0.28 | 0.30 | 0.33 | 0.38 | 0.4 | 0.41 | 0.41 | 0.42 |  | 
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