Cushioning Optimization of Multilayer Regularly-Arranged Circular Honeycombs under In-Plane Crushing Loadings

Abstract

To realize the cushioning optimization of multilayer regularly-arranged circular honeycombs under in-plane crushing loadings with high impact velocities, a finite element model is introduced to obtain the cushioning mechanical parameters. A simplified energy absorption model is used to evaluate the cushioning performance, which shows that the cushioning performance is related to dynamic plateau stress and dynamic densification strain. The impact velocity, deformation mode and configuration parameters determine them. Empirical formulas of critical velocity of deformation mode transition, dynamic densification strain and dynamic plateau stress are given from the discussion of numerical results. A feasible cushioning optimization algorithm is presented in detail.