Experimental Investigation on the Energy Consumption Difference between the Dynamic Impact and the Drilling Tests of Rocks
Table 2
Dynamic mechanical parameters of different specimens for SHPB test.
Specimen no.
Strain rate (s−1)
Peak stress (MPa)
DIF∗
Wi (J)
Wr (J)
Wt (J)
Wa (J)
η (MPa)
Wa/Wi (%)
G-2-0.35∗
78.0
158.0
1.9
368.2
102.7
210.3
32.9
0.084
8.9
G-2-0.38
96.1
244.6
2.9
402.7
163.1
212.3
46.3
0.118
11.5
G-2-0.45
99.6
266.4
3.2
482.9
187.6
222.9
72.4
0.184
15.1
G-2-0.5
107.0
322.6
3.9
519.4
84.2
376.3
117.9
0.300
22.7
S1-1-0.2
62.1
127.5
5.4
177.6
54.0
100.9
25.9
0.066
14.6
S1-1-0.25
118.7
190.1
8.0
235.3
69.8
118.9
46.6
0.119
19.8
S1-1-0.3
159.6
239.0
10.1
289.4
107.9
119.8
61.7
0.157
25.8
S1-1-0.4
194.6
301.4
12.7
407.4
180.5
88.9
140.5
0.358
34.5
S2-1-0.23
69.9
122.3
7.8
206.3
94.9
88.5
22.9
0.058
11.1
S2-1-0.25
86.0
133.0
8.5
243.9
116.6
96.1
31.2
0.079
12.8
S2-1-0.27
111.3
141.5
9.1
250.3
130.8
82.2
37.3
0.095
14.9
S2-1-0.3
133.5
153.3
9.8
265.2
142.6
68.6
54.0
0.138
20.4
∗Note: G means granite, S1 means cyan sandstone, S2 means red sandstone, 0.35 means gas pressure; DIF means dynamic increase factor, which is the ratio of dynamic peak stress to UCS.
