Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content

Table 2

Mechanical parameters of rock samples.

Sample number	Peak stress (MPa)	Peak strain	Elasticity modulus (GPa)	Stress threshold of void compaction stage (MPa)	Strain threshold of void compaction stage	Stress threshold of elastic stage (MPa)	Strain threshold of elastic stage
W0-1	47.45	0.012	4.97	8.73	0.004	30.04	0.008
W0-2	46.36	0.011	5.06	10.9	0.005	29.28	0.009
W0-3	45.44	0.013	4.77	9.89	0.006	28.74	0.009
W1-1	28.56	0.017	2.78	7.78	0.010	15.70	0.013
W1-2	29.91	0.016	2.51	8.88	0.008	16.64	0.012
W1-3	27.07	0.017	2.4	8.51	0.010	14.77	0.013
W2-1	23.13	0.018	2.48	7.20	0.011	14.05	0.014
W2-2	25.39	0.019	2.21	7.04	0.012	13.75	0.014
W2-3	26.07	0.018	2.41	8.32	0.011	15.82	0.014
W3-1	20.38	0.018	2.10	6.55	0.011	13.21	0.014
W3-2	23.19	0.019	2.29	7.83	0.011	14.31	0.014
W3-3	22.22	0.020	2.14	6.74	0.012	12.55	0.015