Out-of-plane Prediction Of Effective Elastic Parameters And Research Of Buckling Performance For Honeycomb Core

Aluminum honeycomb materials are widely used in aerospace, building and other areas of the main load-bearing structure for high specific strength and specific modulus, good design ability, light weight and other significant advantages. Out-ofplane elastic properties and instability buckling of aluminum honeycomb core play an important role in the stable structure. In this paper, by combining the homogenization theory and finite element method, out-of-plane macro equivalent elastic constants of aluminum honeycomb core are predicted. Critical static loads of instability buckling are discussed when vertical loads are applied on the out-of-plane axial of honeycomb core structure.The equivalent performance formulas of honeycomb core composite materials are deduced by combining the homogenization theory and three dimensional finite element methods. The homogenization method program is written using MATLAB language and ANSYS APDL parametric modeling.to predict. The equivalent performance of honeycomb core composite materials is predicted. Micro three dimensional models of Irregular honeycomb core element structure parameters is established. The equivalent elastic parameters of the honeycomb core in the conditions of different cellular structure parameters are calculated. The influence rule of honeycomb core cell parameters on the out-of-plane equivalent elastic parameters is obtained.The influence of the honeycomb core cell structure parameters on the efficiency of the materials has been studied for lightening the weight of the structure based on the three dimensional homogenization program and the material efficiency equivalent elastic parameters. The efficiency calculation program of honeycomb core composite material is written using MATLAB language. The material efficiency of different outof-plane equivalent elastic modulus is obtained.Based on the theory of thin plate buckling, critical static loads of instability buckling of the honeycomb panel with simple supported, elastic supported and fixed supported are analyzed. Characteristics Cell finite element model of the honeycomb core material is established by using ANSYS software. The reliability of the FEA model is verified. The honeycomb core out-of-plane features of static buckling and nonlinear buckling under axial load instability mode are simulated. The influence rule of cellular structure parameters on bearing surface static loads is obtained.This work may be used to supply guidelines for the design and application of honeycomb core composites.