High Strain Rate Compressive Behavior of Polyurethane Resin and Polyurethane/Al₂O₃ Hollow Sphere Syntactic Foams

Figure 12

SEM images of a polyurethane/Al₂O₃ syntactic foam specimen tested at a strain rate of 1670 s⁻¹ showing the (a) specimen shear failure and (b), (c), and (d) failure of a hollow particle.

(a)

(b)

(c)

(d)