High strain rate compression of closed-cell aluminium foams

The compressive deformation behavior of open- and closed-cell aluminum foams was assessed under static and dynamic loading conditions. High sf:rain rate experiments were conducted in our laboratory using a split Hopkinson pressure bar system at strain rates ranging from 400 to 2500 s(-1). A strain rate effect was demonstrated for Alporas, a closed-cell aluminum. foam. The strain-rate effect was more significant for a higher density (i.e. 15% relative density) Alporas foam and is attributed to the kinetics of gas flow through the cell structure. The experimental results are discussed in reference to recent findings by other investigators on the dynamic behavior of similar open- and closed-cell aluminum foams. (C) 2000 Elsevier Science S.A. All rights reserved.