空心颗粒填充复合材料弹塑性力学行为模拟  

ELASTOPLASTIC SIMULATION OF HOLLOW PARTICLE FILLED COMPOSITES

作　　者：梁希[1] 李慧剑[1] 余为[1] 姜鑫[1] 张遵乾[1] 

机构地区：[1]燕山大学河北省重型装备与大型结构力学可靠性重点实验室.秦皇岛066004

出　　处：《固体力学学报》2013年第1期73-82,共10页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(11072210);河北省自然科学基金项目(E2011203230);河北省高等学校科学研究计划(2010166)资助

摘　　要：空心玻璃微珠(Hollow Glass Microballon,简称HGM)填充树脂基复合材料称为复合泡沫材料,近来已被广泛应用在工业中.利用RSA(Random Sequential Adsorption)方法生成了含不同体积比的HGMs填充代表体元模型,然后用有限元方法计算得出了材料的应力-应变关系,将材料属性简化为双线性随动强化模型,分析了HGM填充比、壁厚对材料的有效弹性常数、屈服极限的影响,并分析了材料内部细观应力场和塑性应变分布情况.结果发现,HGM壁厚比对材料有效弹性模量和屈服极限的增减起着决定性作用,而对于任意填充模式来说,材料的比模量和比强度总是大于纯树脂,这一点体现了该材料轻质的优良特性.材料基体的应力集中部位分布以及塑性应变区域的分布也取决于HGM的壁厚比.Syntactic foams are particulate composites obtained by filling a polymeric matrix with hollow glass microballons （HGMs）. RSA （Random Sequential Adsorption） method was adopted to generate the representative volume element （RVE） models of syntactic foams. With the material properties of matrix being simplified into bilinear kinematic hardening model,the stresstrain curve of each type of syntactic foams was obtained by the finite element simulation of RVE. The effects of HGM filling ratio and wallthickness on the elastic constants and yield stress of syntactic foams were analyzed. Results showed that the wall-thickness ratio stress and plastic strain of HGM played key role in the effective Youngs modulus and yield stress, and distributions within the matrix also depended upon the HGMs wall-thickness.

关 键 词：空心玻璃微珠 颗粒填充复合材料 复合泡沫 有效性能 代表体元 

分 类 号：TB332[一般工业技术—材料科学与工程]