Compressive behaviour of aluminum foams at low and mediums strain rates

摘要

Compressive behaviour of CYMAT aluminum foams with relative densities ranged form 5/100 to 20/100 has been studied experi- mentally in this paper. An MTS machine is employed to apply a compressive load at strain rates of 10~-3-10~_+1 s~-1 to these closed-cell aluminum foams. It has been found that the plateau stress is insensitive to the stain rate and is related to the relative density by a power law. Deformation is not uniform over the whole sample: it first occurs in the weakest band, followed by the next weakest bands after the first one has been completely crushed.