A Three-Dimensional Numerical Investigation of Dynamic Fracture Characteristics of Rock Specimens with Preexisting Surface Flaws

Figure 18

The crack propagation on the surface of and inside the specimen with two parallel flaws at select time. The first row (a–d) is for the crack propagation on the surface of the specimen and the second row (a′–d′) is for the crack propagation inside the specimen (plan section B-B′ in Figure 3(a)).