Dynamic Fracture Experiment of Fractured Rock under Dynamic Loading

Table 9

Crack initiation stress in MPa.

Loading Rate (m/s)	a	b	c
9.7	26.97	29.52	22.64
10.6	28.74	41.22	28.86
11.4	23.61	37.46	27.84
12.2	28.38	36.68	32.42
12.8	30.07	38.12	31.43