Dynamic behavior simulation of foam filled honeycomb using material point method

To investigate the dynamic behavior and energy absorption performance of foam filled honeycomb (FFH) under impact loading, a series of meso-structure models were established by material point method (MPM). The stress-strain curves of foam meso-structure models agree well with the theoretical model and experimental data. The deformation and damage morphologies of FFH models are consistent with those of experiments. The result shows that the filled foam and honeycomb consume energy through plastic deformation and buckling separately, and the filled-foam makes a remarkable enhancement effect on the energy absorption of the honeycomb. The influences of the filled-foam density and loading strain rate were investigated. As the filled-foam density increases, the dynamic behavior of FFH turns better, the total energy absorption and that of honeycomb component increase as well. Since the filled-foam intensifies the buckling strength of the honeycomb, the honeycomb could withstand more deformation. The stress-strain curves of FFH are sensitive to the loading strain rate, which has a certain impact on the energy absorption performance, and the total energy absorptions are confined to less than 15%. The total energy absorption and those of each component are determined by the FFH structure, and not irrelevant with the loading strain rate. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.