Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading

Table 1

Parameters of the subloading surface model.

No.	E (GPa)		C (MPa)		b		H		r	u	C
A1	2.18	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.08
A2	1.86	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.19
A3	1.92	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.19
A4	1.84	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.22
A5	2.14	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.10
A6	1.91	0.25	1.54	30.58	0.75	30	1	30	0.5	80	10	0.17