单层编织增强复合材料力学特性计算  

Calculation of Mechanical Properties for Single-Ply Weave-Reinforced Composites

作　　者：高冀峰[1] 余兵 陈务军[1] 胡建辉[1] 赵兵[1] 樊鹏玄 张大旭[2] 房光强 彭福军 GAO Jifeng;YU Bing;CHEN Wujun;HU Jianhui;ZHAO Bing;FAN Pengxuan;ZHANG Daxu;FANG Guangqiang;PENG Fujun(Space Structures Research Center,Shanghai Jiao Tong University,Shanghai 200240,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Aerospace System Engineering,Shanghai 201109,China)

机构地区：[1]上海交通大学空间结构研究中心,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240 [3]上海宇航系统工程研究所,上海201109

出　　处：《上海航天（中英文）》2020年第4期107-116,共10页Aerospace Shanghai（Chinese&English）

基　　金：国家自然科学基金资助项目(51778362);中国博士后科学基金(BX201600104);航天先进技术联合研究中心技术创新项目(USCAST2016-21)。

摘　　要：单层编织增强复合材料具有优异的比强度、比刚度和变形特性,逐渐被应用于空间可展结构。其一般采用薄壳形式,应用基于均匀化ABD刚度矩阵的壳体理论可提高结构计算效率。对于非对称编织增强物,如按经典复合材料理论计算,中性面偏移会导致不准确的耦合效应。本文提出了一种基于单胞模型的多尺度方法,通过确定中性面并施加周期边界条件,计算任意单层编织复合材料的ABD刚度矩阵和模量值。对比试验验证了方法的准确性,预测了平纹、破斜纹1/3、斜纹1/3编织增强复合材料刚度及模量随编织密度的变化趋势,给出了单胞的合理应变分布。Single-ply weave-reinforced composites have been gradually applied to deployable space structures because of their excellent specific strength,specific stiffness,and deformation characteristics.Generally,the space structures made of single-ply weave-reinforced composites are thin shells.It is computationally efficient to analyze these structures with the shell theory based on the homogenized ABD stiffness matrix.For asymmetrical weave-reinforced materials,the shift of the neutral plane will lead to inaccurate coupling effects if the calculations are according to the classical laminate theory.In this paper,a multi-scale method based on the representative volume element(RVE)is proposed,with which the homogenized ABD stiffness matrix and modulus of any single-ply weave-reinforced composite can be calculated accurately.Comparative experiments verify the correctness of the proposed method,predict the trends of stiffness and modulus of plain,broken 1/3,and twill 1/3 weave-reinforced composites with different weaving densities,and provide the reasonable strain distribution of the RVE.

关 键 词：多尺度分析 单胞模型 非对称编织 ABD刚度矩阵 

分 类 号：TB332[一般工业技术—材料科学与工程]