An Experimental Investigation of the Progressive Failure of Sandstone and Its Energy Evolution Characteristics

Table 1

Size, H/D, Young’s modulus (), peak strength (), and peak axial strain () of the sandstone specimens.

Specimen	Diameter (mm)	Height (mm)	H/D	(MPa)	(GPa)	(10^−3)	(MPa)
S60-1	49.68	60.75	1.2	0	21.36	6.46	79.27
S60-2	49.42	60.69	1.2	0	22.41	6.06	85.41
S100-1	49.52	101.28	2	0	26.11	5.21	89.50
S100-2	49.56	99.62	2	0	24.14	5.43	80.28
S100-3	49.73	100.01	2	5	31.08	7.38	135.5
S100-4	49.49	101.30	2	10	35.72	7.91	169.2
S100-5	49.61	100.69	2	15	35.34	10.18	211.9
S120-1	49.45	121.3	2.4	0	24.54	5.20	74.65
S120-2	49.55	119.9	2.4	0	24.67	4.89	71.75