Governing the in-plane axial crushing of honeycomb with regular hexagonal symmetric division cells using cross-hinge inserts

摘要

Dynamic response of honeycomb is characterized by the deformation modes predominantly depending on the cells shape whose geometry, wall thickness and wall angle guide its performance. Without actually modifying the bare honeycomb with regular cell geometry, an idea is presented to divide the honeycomb cells, practically in symmetric half cells using a straight strip of the same material and thickness as of original honeycomb. This strip can guide the deformation modes as per the required performance once the honeycomb mechanical properties are characterized. Dynamic in-plane deformation modes are determined for honeycomb with regular hexagonal symmetric division cells in finite element package ABAQUS for multiple Configurations using proposed straight strip. The energy absorption and formation of X, V and I deformation modes are discussed for the Configuration and its applicability for the controlled and delayed deformation modes is described. An analytical comparison for regular and symmetric division cells is also presented to determine the effect of proposed scheme on modulus and relative density.