Dynamic compression of an ultra-low density aluminium foam

The dynamic compressive behavior of an ultra-low density, open-celled SG91A aluminium foam fabricated by casting technique was investigated at a dynam ic strain rate of 1.4 x 10(3) s(-1). It was found that the plateau stress o f the SG91A foam exhibited strain rate dependence, in a manner similar to o ther metallic foams such as AZ91 foam and ALPORAS. In the present study, ef forts were made to correlate the plateau stress with the density of differe nt foams, and it was further compared with existing models. II is of intere st to note that the absorption energy normalized by the relative density at the dynamic strain rate is similar to 60% higher than that at quasi-static strain rates (similar to 1 x 10(-3) s(-1)). Published by Elsevier Science S.A.