Fracture Property of Y-Shaped Cracks of Brittle Materials under Compression

Figure 3

Test result of the fracture patterns for the specimens with different branch angles.

(a) 𝜃=15^∘

(b) 𝜃=30^∘

(c) 𝜃=45^∘

(d) 𝜃=60^∘

(e) 𝜃=75^∘

(f) 𝜃=90^∘