Triaxial Compressive Failure Characteristics and Constitutive Model Study of Jurassic-Cretaceous Weakly Cemented Sandstone

Table 1

Mechanical parameters of weak cementation sandstone.

Confining pressure (MPa)	Peak stress (MPa)	Peak strain (%)	Residual strength (MPa)	Residual strength point (%)	Modulus of elasticity (GPa)	Poisson’s ratio
0	21.69	0.695	11.34	0.695	3.32	0.31
5	33.35	0.772	16.80	0.772	4.45	0.29
10	48.43	0.847	23.20	0.859	6.17	0.27
15	58.48	0.905	28.07	0.905	8.02	0.22