Dynamic plastic collapse mechanical model of honeycomb structures out-plane deformation

Based on the static plastic collapse stress (SPCS) theoretical model, a dynamic plastic collapse stress (DPCS) theoretical model of honeycomb structures under impact loading was built. In view of the effect that the strain rate had on the dynamic mechanical performance of honeycomb material, the relationship between SPCS and DPCS was established by using Cowper-Symonds model. A sheet bending theory based strain rate formula via the average impact speed was developed. Furthermore, a function about the relationship between DPCS and impact speed was proposed. At last, an out-plane deformation simulation of the aluminum honeycomb structures under impact loading was performed on LS-DYNA dynamics software. The numerical calculation results coincide with the theoretical model calculation ones.