Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

Abstract

The non-linear finite element code LS-DYNA has been used in this work to conduct the crushing examination of both normal and reinforced honeycomb cores. The honeycomb-like cores are provided with out-of-plane quasi-static conditions of stress via an explicit dynamic approach. We have parametrically investigated the effects of cell properties on crushed behaviour as well as the absorption of energy, including the size of the cell, wall thickness, height, along with cell wall tilted position. Regular honeycomb (R0-HC), reinforced every other ribbon (R1-HC), and reinforced every ribbon (R2-HC) are three different varieties of honeycomb. The findings of the numerical analysis of these three types of honeycomb are compared to understand how reinforcing affects energy absorption and crushing parameters. The sheet material AA3003-H18 was chosen to make the honeycomb core. In comparison to ordinary honeycombs, the reinforced honeycombs demonstrated superior crushing behavior and energy absorption. In comparison to the others, reinforced every ribbon (R2-HC) type honeycombs exhibited the greatest values for crushing characteristics and energy absorption. The crushing characteristics and energy absorption of reinforced every other ribbon (R1-HC) honeycombs were higher than those of ordinary honeycombs (R0-HCThe crushing force, average plateau force, and energy absorption values decrease as the cell size, height, and wall angle are increased, however, all these crushing characteristics increase as the cell wall thickness is increased.