Investigation into Macro- and Microcrack Propagation Mechanism of Red Sandstone under Different Confining Pressures Using 3D Numerical Simulation and CT Verification

Table 1

Deformation parameters of the specimens under different confining pressures.

Sample number	Average density (g·cm^-3)	Confining pressure (MPa)	Axial stress (MPa)	Elasticity modulus (GPa)	Poisson ratio	Cohesion (MPa)	Internal friction angle (°)
1	2132	5	59.70	8.92	0.189	12.29	32.84
2		10	80.99	10.03	0.165
3		15	98.21	10.05	0.188
4		20	110.12	11.17	0.189