Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology

Table 1

Physical and mechanical parameters of sandstone and rock-like material.

	ρ (g/cm^3)	σc (MPa)	Ea (GPa)	σt (MPa)	c (MPa)	φ (°)
Sandstone	1.95	98.1	13.5	8.9	31.58	27.33
Rock-like material	2.07	100.3	11.8	6.8	30.11	23.87

Note: ρ indicates the density, σ_c indicates the compressive strength, E_a indicates the elastic modulus, σ_t indicates the tensile strength, c indicates the cohesion, and φ indicates the internal friction angle.