Experimental Study on Dynamic Tensile Mechanical Behavior and Fracture Mechanical Characteristics of Sandstone with a Single Prefabricated Fissure

Table 2

Dynamic split test results of CCBD sandstone specimen [41].

Specimen number	Fissure angle, θ (^°)	Impact pressure, p (MPa)	Strain rate, (s^−1)	Peak load, P (KN)	Peak load time, tp (µs)	Type I stress intensity factor,; (KPa·m^0.5)	Type I stress intensity factor, (KPa·m^0.5)	Dynamic fracture toughness,; (KPa·m^0.5)
FA1-1	0	0.2	106.24	19.24	52.5	2.09	0.00	2.09
FB1-1	30	0.2	113.97	17.98	43.2	−0.66	3.38	3.44
FC1-3	45	0.2	116.04	24.35	43.5	−3.73	5.00	6.24
FD1-2	60	0.2	109.71	26.22	48.4	−5.58	3.66	6.67
FE1-3	90	0.2	104.07	20.98	47.7	−5.69	0.00	5.69
FA2-2	0	0.3	148.55	38.96	31.8	4.25	0.00	4.25
FB2-3	30	0.3	168.16	32.97	38.0	−1.22	6.33	6.45
FC2-2	45	0.3	164.21	30.34	40.9	−4.51	6.02	7.52
FD2-2	60	0.3	156.88	24.73	34.1	−5.16	3.38	6.17
FE2-2	90	0.3	160.21	28.85	41.9	−7.65	0.00	7.65
FA3-2	0	0.5	216.53	52.45	39.4	5.76	0.00	5.76
FB3-2	30	0.5	230.95	43.83	35.7	−1.73	8.81	8.98
FC3-1	45	0.5	232.99	37.09	42.3	−5.82	7.70	9.65
FD3-3	60	0.5	234.03	35.96	38.9	−7.75	5.04	9.24
FE3-1	90	0.5	230.05	34.47	41.2	−9.14	0.00	9.14