颗粒填充复合材料的应变统计特征与刚度模量  

Statistic Regularity of Strain Distribution and Stiffness Prediction of Particulate-filled Composites

作　　者：杨俊[1] 吴炜[1] 王治国[1] 刘晓宇[1] 梁乃刚[1] 

机构地区：[1]中科院力学所LNM国家重点实验室,北京100080

出　　处：《航空学报》2005年第1期44-49,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家973计划项目(2002CB412706);国家自然科学基金项目(10232050)资助

摘　　要：针对填充颗粒体积份数高、随机分布的复合材料,基于一种特定应变分解方式,利用有限元数值分析,研究了任意宏观变形条件下代表性体积单元内应变分布的统计规律,分别得到了颗粒与基体内应变的平均值、应变的涨落值与宏观应变之间的统计关系,并对颗粒填充复合材料的等效剪切模量和等效体积模量进行了预测。Aimed at particulate-filled composites with high-volume-fraction and randomly distributed particles, based on a particular strain decomposition mode, the statistical regularities of strain distribution of representative volume element （RVE） under any macro-deformation loading are investigated by FEA method, the statistical regularities of the mean-value and fluctuation of strain in particle as well as in matrix to the macroscopical strain are obtained, and the equivalent bulk modulus and equivalent shear modulus of the composites are derived.

关 键 词：颗粒填充复合材料 应变统计规律 刚度模量 

分 类 号：V252[一般工业技术—材料科学与工程] TG132.27[航空宇航科学与技术—航空宇航制造工程]