两种孔隙形状泡沫铝/环氧树脂复合材料弹性常数研究  

Studies on elastic constants of foam aluminum/epoxy composites with two pore shapes

作　　者：余为[1] 杨柳[1] 刘学谨[1] 宋军甫[1] 王媚雪[2] 李慧剑[1] 

机构地区：[1]燕山大学建筑工程与力学学院,河北秦皇岛066004 [2]燕山大学艺术与设计学院,河北秦皇岛066004

出　　处：《燕山大学学报》2013年第3期278-282,共5页Journal of Yanshan University

基　　金：河北省高等学校科学技术研究重点项目(ZH2012011);河北省高等学校科学研究计划(2010166)

摘　　要：泡沫铝中填充环氧树脂形成的复合材料兼具金属和树脂的双重性能。本文基于细观力学胞元法建立了两种孔隙形状的泡沫铝/环氧树脂复合材料的细观力学模型,通过理论分析得出了复合材料的弹性模量预测公式,并计算了4种孔隙率情况下复合材料的弹性模量,分析了孔隙率对材料弹性模量的影响。通过建立数值模拟模型,对复合材料的弹性模量和泊松比进行了模拟分析。研究结果表明:理论预测与模拟结果较为吻合,且孔隙率越高,其差值越小;孔隙形状对复合材料的弹性模量具有较大影响,球形孔隙形状复合材料的力学性能较矩形孔隙形状的力学性能更为优异。The composite formed by foam aluminum filled with epoxy has the properties of both metal and resin.Based on micromechanics unit cell method,two micro-mechanics models with different aluminum pore shapes of aluminum foam/epoxy resin composite are built.Through theoretical analyses,the elastic moduli of foam aluminum/epoxy composites are predicted for four porosities and the influence of porosity on elastic modulus is also analyzed.Then,the elastic modulus and Poisson＇s ratio of foam aluminum/epoxy composite are studied by numerical simulation.Acceptable agreement is achieved between theoretical prediction and numerical simulation.It is also found that calculation error decreases with the increase of the porosity.Besides,the pore shape has a significant influence on the elastic modulus of the composite.The mechanical properties of the composite with spherical pores are higher than that with rectangle ones.

关 键 词：泡沫铝 环氧树脂 孔隙形状 孔隙率 弹性模量 

分 类 号：TB332[一般工业技术—材料科学与工程]