Energy Dissipation and Failure Characteristics of Layered Composite Rocks under Impact Load

Table 2

Energy distribution of layered composite rock mass.

Sample type	Impact velocity (m/s)	Incident energy WI (J)	Reflected energy WR (J)	Absorbed energy WA (J)	Fragmentation energy density εd (J⋅cm^−3)
B⟶W	7.31	79.671	43.542	24.643	0.251
	7.35	78.732	41.806	24.957	0.254
	7.29	77.814	43.809	25.212	0.257
W⟶B	7.27	79.451	38.113	27.284	0.278
	7.32	79.135	37.508	28.566	0.291
	7.25	76.674	32.738	26.374	0.269
B⟶W	8.39	109.912	52.597	32.217	0.328
	8.38	111.217	51.165	35.033	0.357
	8.28	109.384	55.786	32.487	0.331
W⟶B	8.64	109.174	48.525	37.216	0.379
	8.54	108.317	50.743	39.211	0.446
	8.58	103.751	44.538	34.653	0.353
B⟶W	9.95	149.788	66.433	53.068	0.541
	9.84	145.979	65.691	50.947	0.519
	9.76	143.522	61.714	51.955	0.529
W⟶B	9.66	140.853	58.13	56.614	0.577
	9.85	145.947	61.46	59.984	0.611
	9.87	146.586	60.169	58.341	0.595
B⟶W	10.47	161.287	72.245	62.865	0.641
	10.56	164.523	70.745	64.328	0.656
	10.44	160.994	74.057	65.686	0.669
W⟶B	10.57	159.715	70.686	66.086	0.673
	10.64	166.827	70.067	67.899	0.692
	10.58	165.183	71.029	69.542	0.709
B⟶W	12.63	232.084	109.443	93.681	0.955
	12.62	229.321	105.488	90.352	0.921
	12.57	228.594	107.439	88.466	0.902
W⟶B	12.78	238.477	110.756	91.942	0.937
	12.64	232.635	104.686	91.193	0.929
	12.41	222.971	102.567	91.641	0.934