Dynamic Behavior and Fatigue Damage Evolution of Sandstone under Uniaxial Cyclic Loading

Table 1

Parameters for different specimens tested.

Groups	Specimen	D (mm)	L (mm)	M (g)	ρ (g·cm^−3)	Average density (g·cm^−3)	Loading mode	σmax (MPa)	σmin (MPa)	f (Hz)	Failure strength (MPa)	Cycle number
1	U1	50.10	99.84	520.3	2.645	2.630	Uniaxial compression	—	—	—	65.6	—
	U2	49.42	100.02	502.1	2.618		Uniaxial compression	—	—	—	67.5	—
	U3	48.82	99.78	490.4	2.627		Uniaxial compression	—	—	—	68.0	—
2	C-A1	48.84	98.64	483.4	2.617	2.620	Cyclic loading	35	25	0.5	—	1000
	C-A2	49.10	99.43	496.6	2.639		Cyclic loading	45	25	0.5	—	1000
	C-A3	48.30	100.20	478.4	2.607		Cyclic loading	55	25	0.5	55	297
3	C–F1	49.02	100.3	499.8	2.642	2.630	Cyclic loading	45	40	0.5	—	1000
	C–F2	48.24	99.90	474.9	2.602		Cyclic loading	45	40	1	—	1000
	C–F3	48.44	100.2	487.2	2.640		Cyclic loading	45	40	2	—	1000