Dynamic Failure Characteristics of Combination Rock under Different Strain Rates: Insights from SHPB Tests

Table 2

Dynamic mechanical parameters of composite specimens for SHPB test.

Specimen no.	Strain rate (s^−1)	Peak stress (MPa)	(J)	(J)	(J)	(J)	η (%)
H-S1-0.3	143.1	101.4	313.4	147.7	117.1	48.6	15.5
H-S1-0.35	200.7	148.7	371.0	180.2	114.4	76.4	20.6
H-S1-0.4	239.9	178.2	445.0	245.4	85.2	114.4	25.7
S1-H-0.3	165.4	113.5	264.2	181.6	49.5	33.1	13.0
S1-H-0.35	217.7	155.1	357.7	183.8	78.7	95.2	26.6
S1-H-0.4	252.1	188.1	511.8	229.2	86.8	195.8	42.2
H-S2-0.3	195.0	132.3	318.4	129.7	84.6	104.1	32.7
H-S2-0.35	202.4	141.2	356.1	188.1	23.4	144.6	40.6
H-S2-0.4	225.5	168.4	402.3	154.1	49.9	198.3	49.3
S2-H-0.3	172.8	113.1	254.4	112.2	65.9	76.3	30.0
S2-H-0.35	177.6	118.7	277.0	118.4	71.1	87.5	31.6
S2-H-0.4	217.7	149.3	365.6	185.5	15.6	164.5	45.0
S1-S2-0.3	165.8	102.3	294.2	190.7	59.1	44.4	15.1
S1-S2-0.35	230.3	130.0	387.9	220.2	76.2	91.5	23.6
S1-S2-0.4	246.9	144.5	453.3	275.1	43.6	134.6	29.7
S2-S1-0.3	179.8	107.5	275.4	157.4	64.3	53.7	19.5
S2-S1-0.35	216.8	113.1	349.1	224.0	45.9	79.2	22.7
S2-S1-0.4	230.8	117.1	377.6	247.1	38.0	92.5	24.5

Note: the specimen no. H-S1-0.3, H means granite, S1 means cyan sandstone, and 0.3 means gas pressure.