Experimental Study and Damage Model Study of Rock Salt Subjected to Cyclic Loading and Cyclic Creep

Table 2

Results of cyclic loading and cyclic creep tests on rock salt.

No.	Maximum stress value (MPa)	Minimum stress value (MPa)	Axial strain at damage point	Number of cycle (N)	Damage
X1	31.96	9.13	—	5422	Undamaged
X2	34.25		0.14	1591	Damaged
X3	36.53		0.09	154	Damaged
X4	38.81		0.08	19	Damaged
R1	27.40	9.13	0.11	51	Damaged
R2	29.68		0.12	23	Damaged
R3	31.96		0.08	1	Damaged