Research Article

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

Figure 10

Load-displacement curves of the 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°.
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