Energy Analysis on Dynamic Fragmentation Degree of Cemented Sand Specimens under Confining Pressure

Table 4

Dynamic compression physical parameters and fracture energy calculation of cemented sand specimens.

Number						(J)	(J)	(J)	(J)	(J)
DY-2-2	0.15	0	3.11	89.6	8.6	19.87	6.501	0.1540	1.752	4.595
DY-2-6	0.2	0	3.72	115.2	9.5	40.41	7.699	0.2144	3.554	3.931
DY-2-9	0.25	0	4.22	118.7	11.0	44.38	8.442	0.2651	5.024	3.154
DY-2-12	0.3	0	4.80	143.5	13.5	68.04	13.373	0.4723	10.39	2.510
ZY-2-15	0.3	1	4.88	146.6	12.9	60.96	8.656	0	0.5523	8.103
ZY-2-18	0.5	1	6.65	189.2	22.3	109.5	19.45	0	1.744	17.67
ZY-2-21	0.7	1	8.16	218.3	26.0	148.1	24.71	0	5.024	19.68
ZY-2-23	0.9	1	9.31	257.2	31.8	194.1	35.25	0	10.55	24.70
ZY-2-3	0.9	0.86	9.29	255.2	30.8	194.0	37.00	0	13.06	23.93
ZY-2-4	0.9	1.15	9.28	259.9	33.0	193.8	33.36	0	3.403	29.95
ZY-2-8	0.9	1.3	9.30	263.5	34.7	186.8	27.75	0	2.711	25.04
ZY-2-12	0.9	1.45	9.32	264.4	35.6	191.7	25.14	0	1.979	23.16

: impact air pressure; : confining pressure values; : impact velocity; : average strain rate; : dynamic compressive strength; : incident wave energy; : energy absorbed by the specimen; : kinetic energy of fragments; : fracture energy; : damage energy.