Experimental Investigation on Dynamic Fracture Mechanism and Energy Evolution of Saturated Yellow Sandstone under Different Freeze-Thaw Temperatures

Table 2

Velocity of striker bar () and strain rate of specimen () under different freezing temperatures.

Sample	T (°С)	(m·s^−1)		(s^−1)
		Each sample	Average value	Each sample	Average value
1	20	9.53	9.51	74.34	74.74
2		9.69		76.98
3		9.31		72.87
4	−5	9.25	9.49	71.47	74.57
5		9.49		74.88
6		9.72		77.37
7	−10	9.81	9.51	78.69	74.89
8		9.33		72.16
9		9.39		73.81
10	−15	9.54	9.33	74.23	72.88
11		9.19		71.59
12		9.27		72.82
13	−20	9.71	9.67	76.80	75.97
14		9.77		77.61
15		9.54		73.50
16	−30	9.71	9.54	73.92	73.60
17		9.74		75.26
18		9.17		71.63