Effect of Pre-Existing Symmetrical Cracks on Propagation Behaviors of a Blast-Induced Crack

Figure 7

Crack propagation patterns under parallel symmetrical cracks in PMMA specimens. (a) S = 20 mm. (b) S = 35 mm. (c) S = 50 mm. (d) S = 65 mm. (e) S = 80 mm. (f) S = 95 mm.

(a)

(b)

(c)

(d)

(e)

(f)