Crack Propagation and Fragmentation Characteristics of Single-Flawed Sandstone Samples under Different Loading Conditions

Table 9

Energy indexes of samples.

Specimen number	Wi (J)	Ws (J)	η	e (J/cm^3)
D-0-4	30.00	11.96	0.40	0.59
D-0-5	28.73	10.97	0.38	0.55
D-0-6	28.84	11.08	0.38	0.61
D-0-7	58.55	25.77	0.44	1.44
D-0-8	63.09	26.92	0.43	1.24
D-0-9	60.40	26.20	0.43	1.32
D-0-10	94.50	45.92	0.49	1.55
D-0-11	92.00	45.96	0.50	1.79
D-0-12	98.56	50.70	0.51	1.76
D-30-4	24.89	9.52	0.38	0.51
D-30-5	31.42	12.27	0.39	0.55
D-30-6	26.13	9.64	0.37	0.50
D-30-7	63.09	26.10	0.41	1.19
D-30-8	65.34	28.41	0.43	1.36
D-30-9	56.58	24.58	0.43	1.20
D-30-10	105.00	48.43	0.46	2.30
D-30-11	95.44	45.16	0.47	2.06
D-30-12	97.68	47.78	0.49	2.08
D-45-4	31.56	12.42	0.39	0.43
D-45-5	28.26	11.13	0.39	0.49
D-45-6	32.78	13.00	0.40	0.39
D-45-7	63.18	26.99	0.43	1.09
D-45-8	57.12	25.16	0.44	1.13
D-45-9	57.24	25.63	0.45	1.19
D-45-10	100.80	49.78	0.49	2.09
D-45-11	97.82	46.65	0.48	2.05
D-45-12	104.39	49.94	0.48	1.76
D-60-4	30.16	12.20	0.40	0.75
D-60-5	30.29	12.20	0.40	0.60
D-60-6	27.24	10.72	0.39	0.61
D-60-7	62.80	27.80	0.44	1.21
D-60-8	60.50	27.94	0.46	1.36
D-60-9	57.50	25.75	0.45	1.35
D-60-10	101.40	53.16	0.52	2.29
D-60-11	104.58	53.80	0.51	2.27
D-60-12	99.00	48.48	0.49	2.18
D-90-4	28.88	11.65	0.40	0.56
D-90-5	31.89	13.19	0.41	0.72
D-90-6	30.48	12.43	0.41	0.79
D-90-7	62.64	29.00	0.46	1.14
D-90-8	58.25	27.62	0.47	1.34
D-90-9	62.40	27.92	0.45	1.25
D-90-10	105.70	52.34	0.50	2.20
D-90-11	99.90	52.20	0.52	2.27
D-90-12	103.04	55.06	0.53	2.21