Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Figure 7

Constant load test curve of rock samples from the USH group.

(a) USH-1 sample

(b) USH-2 sample

(c) USH-3 sample

(d) USH-4 sample

(e) USH-5 sample

(f) USH-6 sample

(g) USH-7 sample

(h) USH-8 sample