球形孔泡沫铝动态力学性能的数值分析

face-centered cubic unit cell model is presented to investigate the strain rate effect of closed-cell aluminum foams with spherical pores under impact loading. The influences of inertia effect and strain rate effect of base materials are analyzed. The results demonstrate that closed-cell aluminum foams are insensitive to low and medium strain rate(＜102s-1). However, in high strain rate(＞102s-1), closed-cell aluminum foams are sensitive to strain rate, which originates from strain rate effect of the base material when the unit cell of the closed-cell aluminum foams deforms uniformly, and from both of inertia effect and strain rate effect of the base material when a local deformation band occurs in the unit cell with the increasing of the strain rate.