Energy and Fatigue Damage Evolution of Sandstone under Different Cyclic Loading Frequencies

Table 1

Parameters for different rocks tested.

Groups	Specimen	D (mm)	L (mm)	M (G)	ρ (g·cm^−3)	Average density (g·cm^−3)	Loading mode
1	U1	50.10	99.84	520.3	2.645	2.630	Uniaxial compression
	U2	49.42	100.02	502.1	2.618		Uniaxial compression
	U3	48.82	99.78	490.4	2.627		Uniaxial compression
2	CF1-1	49.02	100.3	499.8	2.6403	2.6228	Cyclic loading
	CF1-2	50.04	100.9	512.3	2.5817		Cyclic loading
	CF1-3	48.96	99.5	495.7	2.6462		Cyclic loading
3	CF2-1	48.24	99.9	474.9	2.6010	2.6168	Cyclic loading
	CF2-2	49.64	100.12	510.6	2.6352		Cyclic loading
	CF2-3	49.18	99.86	495.9	2.6142		Cyclic loading
4	CF3-1	48.44	100.2	487.2	2.6384	2.6374	Cyclic loading
	CF3-2	49.96	99.84	513.8	2.6252		Cyclic loading
	CF3-3	49.12	99.54	499.6	2.6486		Cyclic loading