Investigation into Macro- and Microcrack Propagation Mechanism of Red Sandstone under Different Confining Pressures Using 3D Numerical Simulation and CT Verification
Table 2
Mesoparameter calibration of numerical simulation.
Microparameters
Values
The minimum radium of the ball, /mm
0.85
Ratio of the maximum to the minimum radium of the ball,
1.5
Density of the ball, /(kg/m3)
2132
Ball friction coefficient,
0.5
Young’s modulus of the ball, /GPa
9.2
Ratio of normal to shear stiffness of the ball,
2.3
Radius multiplier of the parallel bond,
1.0
Young’s modulus of the parallel bond, /GPa
9.2
Ratio of normal to shear stiffness of the parallel bond, /
