基于细观力学推广用法的蜂窝铝弹性性能参数研究

Study on the elastic property of honeycomb aluminum based on the generalized method of micromechanics

随着各类新型复合材料的迅速发展,复杂结构的材料性能的研究方法越来越多。本文基于复合材料细观力学方法,推广了代表性体积元的概念,对蜂窝铝材料的弹性参数进行了数值研究,搭建了具有不同几何参数的135个蜂窝铝RVE有限元模型并计算,通过多元回归分析的方式得到了其弹性模量的拟合公式。同时提出了通过统计学方法来分析有限元计算结果得到复杂材料属性的一般规律,预测具有复杂结构的材料性能,指导材料在工程领域的应用的方法,并通过某一应变率下的SHPB试验验证了其可行性。

With the rapid development of all kinds of new composite materials,there are more and more methods to study the material properties of complex structures.Based on the method of composite micromechanics,the concept of representative volume element is extended,and the elastic parameters of honeycomb aluminum are numerically studied.135 RVE finite element models of honeycomb aluminum with different geometric parameters are built and calculated.The fitting formula of elastic modulus was obtained by multiple regression analysis.At the same time,a statistical method is proposed to analyze the finite element calculation results,obtain the general law of complex material properties,predict the material properties with complex structure,and guide the application of materials in the engineering field.The feasibility of this method is verified by SHPB experiment at a certain strain rate.