Research Article
Numerical Investigation of Acoustic Emission Events of Argillaceous Sandstones under Confining Pressure
Table 2
Microscopic parameters of the simulated specimen after calibration.
| | Microparameters | Symbol | Unit | Value |
| | The minimum particle radius | | mm | 1.0 | | Ratio of maximum and minimum particle radius | / | / | 1.67 | | Particle density | | kg/m3 | 2800 | | Particle friction coefficient | | / | 0.55 | | Young’s modulus of the particle | | GPa | 14.4 | | Parallel bond radius multiplier | | / | 1.0 | | Young’s modulus of the parallel bond | | MPa | 14.4 | | Normal stiffness of the parallel bond (mean) | | MPa | 14.7 | | Normal stiffness of the parallel bond (std. deviation) | | MPa | 3.6 | | Shear stiffness of the parallel bond (mean) | | MPa | 9.2 | | Shear stiffness of the parallel bond (std. deviation) | | MPa | 2.4 |
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