EXPERIMENTAL CHARACTERIZATION OF SHOCK-WAVE BEHAVIOR OF POROUS ALUMINUM

Experiments of shock wave propagation performed on 9% and 17% porous a luminum are presented and analyzed. The originality of the plate impac t set-up and its associated metrology (VISAR interferometry and PVDF p iezoelectric gages) exhibits also the influence of local physical mech anisms on shock wave propagation in porous aluminum. More, the variati ons observed between the rise times of shocks to point out a preponder ance of the dynamic effects (inertia or strain rate) over the material behavior. This point is confirmed by comparing quasi static and dynam ic responses of porous aluminum.