Study on Nonlinear Damage Creep Model for Rocks under Cyclic Loading and Unloading

Table 2

Test scheme for triaxial creep.

Rock specimen	Confining pressure (MPa)	Deviatoric stress level (MPa)
		First level	Second level	Third level	Fourth level	Fifth level	Sixth level
Lherzolite	3	13.3	22.1	26.6	28.8	31.0	39.9
Limestone	4	29.6	33.8	38.0	42.2	46.4	50.6