Mechanical Properties Analysis on a Novel Negative Poisson's Ratio Voronoi Foam‐Filled Corrugated Tube Under Impact Loading

Abstract

A novel negative Poisson's ratio (NPR) foam‐filled corrugated tube, made up of a corrugated tube and NPR isotropic foam core, is established by the finite element method. The 3D NPR isotropic foam core is achieved by using the triaxial compression method on a cubic Voronoi model, which is created based on the Voronoi tessellation technique. The triaxial compression ratio is defined as η. The Poisson's ratio of Voronoi foam decreases sharply and then increases gradually with an increasing η. A minimum Poisson's ratio, −0.076, is obtained when η = 0.2. Moreover, the Voronoi foam‐filled corrugated tube with minimum Poisson's ratio foam core exhibits the highest energy absorption capacity, which is 10.8% higher than that of the Voronoi foam‐filled corrugated tubes with uncompressed foam core.