Strength Characteristics and Failure Mechanism of Granite with Cross Cracks at Different Angles Based on DIC Method

Table 1

UCS and CIS of the samples with different crack angles.

Sample number	Uniaxial compression strength (i.e., UCS) (MPa)	Crack initiation stress (i.e., CIS) (MPa)	The stress ratio (between CIS and UCS)
00-00	115.65	88.27	0.76
00-30	97.85	46.98	0.48
00-45	52.43	33.49	0.64
00-60	57.61	23.07	0.40
00-90	47.91	19.28	0.40
30-00	80.76	29.38	0.36
30-30	64.44	29.60	0.46
30-45	59.35	24.49	0.41
30-60	62.91	25.94	0.41
30-90	62.12	26.31	0.42
45-00	44.04	24.01	0.55
45-30	50.44	24.54	0.49
45-45	46.55	13.13	0.28
45-60	37.77	9.46	0.25
45-90	44.63	10.42	0.23
60-00	38.26	17.22	0.45
60-30	40.55	16.20	0.40
60-45	43.74	21.35	0.49
60-60	25.23	9.08	0.36
60-90	41.64	24.32	0.58
90-00	43.14	33.33	0.77
90-30	40.94	18.03	0.44
90-45	42.45	14.99	0.35
90-60	46.33	23.88	0.52
90-90	36.94	23.20	0.63