Numerical Modeling of Sandwich Panel Response to Ballistic Loading

Abstract

A sandwich panel is described by an axisymmetric lumped mass/spring model. The panel compliance is simplified, considering only core shear deformation. Transverse penetrating impact is modeled; impactor diameter is significantly smaller than panel size. Experimental data for the total loss in impactor kinetic energy and momentum and estimated damage energy are given. For a selection of impactor tip shapes, the numerical model is used to evaluate different force-histories between the impactor and the panel during penetration