Dynamic Fracture and Energy Evolution Characterization of Naturally Fractured Granite Subjected to Multilevel Cyclic Loads

Figure 4

Fatigue deformation characteristics of the tested granite samples containing different natural fracture volumes. (a–d) The natural fracture volume ratio is 0.08%, 0.12%, 0.56%, and 2.11%, respectively.

(a)

(b)

(c)

(d)