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

Figure 11

Crack propagation patterns under oblique symmetrical cracks in PMMA specimens. (a) θ = −80°. (b) θ = −50°. (c) θ = −20°. (d) θ = 80°. (e) θ = 50°. (f) θ = 20°.

(a)

(b)

(c)

(d)

(e)

(f)