Effect of Cell Geometry on Energy Absorption of Honeycombs Under In-Plane Compression

摘要

This study examines the energy absorption capabilities of cellular honeycombs subjected to in-plane compression.nABAQUS nonlinear finite element analysis is used and cellular honeycombs with different cell geometries arenconsidered. Simulation results are validated against previously published results for 30 deg cellular honeycombs. Fornvarious cell angles, comparison of simulation results for full-size honeycombs and their single-cell analogs suggestnthat the energy absorption can be accurately determined using the single-cell model. Results indicate that for cellsnwith equal wall length, the specific energy absorption capability increases with increasing cellular honeycomb angle.nAcellwall length study shows that the specific energy absorption (energy absorption per unitmass) is higher for cellsnwith shorter vertical walls. A cell wall thickness study shows that increasing wall thickness increases the specificnenergy absorption. A vertical wall thickness study shows that the vertical walls should be thick enough not to buckle,nbut no thicker, providing the maximum energy absorption for minimum weight. A detailed analysis of cellndeformation for different honeycombs and an insight of the underlying physics behind the differences in energynabsorption capabilities observed for the different honeycombs are also presented.