Mechanical Properties and Energy Dissipation of Sandstone under Cyclic Loading-Unloading

Table 1

Uniaxial compressive strength of sandstone with different damage degrees.

Number	Strength (MPa)	Average strength (MPa)
0.2–1	59.13	57.62
0.2–2	52.98
0.2–3	60.75
0.4–1	57.65	56.03
0.4–2	54.12
0.4–3	56.34
0.6–1	41.66	44.68
0.6–2	45.22
0.6–3	47.18
0.8–1	34.12	26.03
0.8–2	21.95
0.8–3	22.01