Effects of Constant Amplitude Cyclic Loading on the Nonuniform Deformation of Sandstone Specimens

Figure 9

Nephogram of deformation field: (a) PPL at the 15^th cycle; (b) BPU at the 15^th cycle; (c) PPL at the 16^th cycle; (d) BPU at the 16^th cycle; (e) PPL at the 17^th cycle; (f) BPU at the 17^th cycle.

(a)

(b)

(c)

(d)

(e)

(f)