Research Article
Elastoplastic Analysis of Circular Opening Based on a New Strain-Softening Constitutive Model and Its Engineering Application in Hydraulic Fracturing
Table 2
Geometrical and physical parameters of circular opening (data from Li et al. [
23]).
| Parameter | Value |
| Radius of opening, (m) | 0.1 | In situ stress, (MPa) | 15 | Inner pressures, (MPa) | 0 or 40 | Young’s modulus, (MPa) | 1500 | Dilatancy coefficient, | 1.0 | Poisson’s ratio, | 0.3 | Brittleness coefficient, | 0.5 | Internal friction angle, (°) | 30 | Initial compressive strength, (MPa) | 8 | Residual compressive strength, (MPa) | 1 |
|
|