Crack Initiation, Propagation, and Coalescence Experiments in Sandstone Brazilian Disks Containing Pre-Existing Flaws

Figure 8

Experimental results of crack propagation paths in tested specimens with different pre-existing crack inclination angles: (a) β = 0, (b) β = 15°, (c) β = 30°, (d) β = 45°, (e) β = 60°, (f) β = 75°, and (g) β = 90°.

(a)

(b)

(c)

(d)

(e)

(f)

(g)