Experimental Study on the Crack Initiation and Propagation of Unequal Cracks in Rock-Like Materials

Table 2

Test condition A.

Test conditions	Lbc (mm)	α
Test condition 1	12	α = 0°
Test condition 2	12	α = 30°
Test condition 3	12	α = 45°
Test condition 4	12	α = 60°
Test condition 5	12	α = 90°
Test condition 6	18	α = 0°
Test condition 7	18	α = 30°
Test condition 8	18	α = 45°
Test condition 9	18	α = 60°
Test condition 10	18	α = 90°
Test condition 11	24	α = 0°
Test condition 12	24	α = 30°
Test condition 13	24	α = 45°
Test condition 14	24	α = 60°
Test condition 15	24	α = 90°