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

Figure 5

Evolution of the dynamic elastic modulus () and hysteretic damping ratio () with cyclic number for sample with natural fracture volume ratio of 0.08%, 0.12%, 0.56%, and 2.11%, respectively. (a–d) Plots of against loading cycle number during sample deformation; (e–f) plots of the against loading cycle number during sample deformation.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)