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

Figure 9

Evolution of the total strain energy, elastic energy, and dissipated energy with the upper axial stress at the last loading cycle of each stage. (a–d) The natural fracture volume is 0.08%, 0.12%, 0.56%, and 2.11%, respectively.

(a)

(b)

(c)

(d)