Experimental investigation on static compressive behavior and energy-absorption performance of closed cellular Al-Cu alloy

An experimental investigation was carried out to study the static-compressive behavior and energy-absorption performance of a closed cellular Al-Cu alloy. The fitting curves of relative elastic modulus-relative density and relative plateau stress-relative density for a special range of density were built. It was found that good agreement could be achieved if the constants in Gibson's formulas for open cellular materials were revised to the constants determined by experiments. Furthermore, the energy-absorption performances of the closed cellular Al-Cu alloy for a special range of density were analyzed directly by constructing the Se- or Se- diagrams, where Se specific energy is the absorbed energy per unit mass. These diagrams may have good referential values for structural design.