In-plane crushing behavior of a novel re-entrant diamond-shaped honeycomb and its variant structures

Abstract

In this paper, different polygonal structures are employed to improve the inclined cell walls of the well-known re-entrant honeycomb (REH) to obtain a series of novel REHsto proposed enhancement energy absorption capacity. The energy absorption effect and platform stress of this series of novel REHs and classical REHs were compared by quasi-static experiments. A significant negative Poisson's ratio effect was observed in all the new honeycombs. The crushing behaviors of these honeycombs under different crushing velocities were further simulated using the finite element (FE) software ABAQUS/Explicit. Both experimental and numerical results show that this series of novel REHs constructed herein have stronger crushing strength and energy absorption capacity compared to the original REH.