纤维增强对称层合复合材料的宏观热膨胀系数研究  

Study on the macro thermal expansion coefficients of fiber-reinforced symmetric laminates

作　　者：刘兵山[1] 燕瑛[2] 田金梅[3] 

机构地区：[1]中国科学院光电研究院空间系统工程部,北京100080 [2]北京航天航天大学航空科学与工程学院,北京100083 [3]核工业第二研究设计院系统与布置设计所,北京100840

出　　处：《强度与环境》2008年第5期17-24,共8页Structure & Environment Engineering

基　　金：国家自然科学基金项目(50073002)

摘　　要：为了得到对称层合复合材料的宏观热膨胀系数,首先根据细观力学方法,推导得到了以各材料相性能数据表达的单层板的热膨胀系数。在此基础上,根据弹性力学方法,并借助于理想界面均匀化方法,得到了以单层热膨胀系数表达的层合板的宏观等效热膨胀系数表达式。这样,在已知各相材料性能数据和铺层的条件下,即可直接求得层合板的热膨胀系数。理论计算结果与实验数据进行了对比,证明了理论方法的合理性,为层合复合材料热相关问题的研究奠定了基础,有较大工程应用价值。In order to get the macro thermal coefficients of symmetric laminates, the thermal expansion coefficients of laminar are derived by properties of each phase of the laminar according to methods of micromechanics firstly. Then, the macro effective thermal expansion coefficients of laminates are obtained by elasticity method and homogenization method based on perfect interface. So if the material properties of each phase and the ply style of the laminates are given, the macro effective thermal expansion coefficients of laminates can be obtained. The present theoretical prediction is compared with the experimental data, which proves that the present method is reasonable. So it lays a foundation of thermal study of laminates and will be greatly useful in thermal deformation analysis of laminates in engineering.

关 键 词：复合材料 对称层合板 热膨胀系数 细观力学 均匀化方法 

分 类 号：TB330.1[一般工业技术—材料科学与工程]