Deformation mechanics and overload characteristics of square steel honeycombs under out-plane impact loading

This study presents the experimental and numerical investigations on the response of honeycomb structures to high-velocity impact loading for varying structural and impacting parameters. The acceleration–time curve and pictures of impact progress were measured in the test. Comparison between the experimental data and the numerical simulation data indicated that the FE model was capable enough to predict the deformation mode of the honeycomb structures and overload characteristics of projectile with good accuracy. Furthermore, the effect of the projectile velocity v 0 and the thickness–length ratio t/l on deformation mode of honeycomb and projectile overload characteristics was studied by numerical simulation based on the single factor alternative method. Results indicated that the deformation mode of the honeycomb structure is related to the initial projectile velocity v 0 and the thickness–length ratio t/l of the honeycomb structure. The results derived from this study could be applied to the design of high overload environment for assessing the projectile-based equipment.