平纹机织多元多层碳化硅陶瓷基复合材料的等效弹性模量预测  

Prediction of Effective Elastic Modulus of Plain Weave Multi-phase and Multi-layer Silicon Carbide Ceramic Matrix Composite

作　　者：许英杰[1] 张卫红[1] 杨军刚[1] 汪海滨[1] 

机构地区：[1]西北工业大学中法并行工程联合实验室,高性能计算中心,现代设计与集成制造技术教育部重点实验室,陕西西安710072

出　　处：《航空学报》2008年第5期1350-1355,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(90405016;50775184);航空科学基金(2006ZA53006);国家"973"基础研究(2006CB601205)

摘　　要：针对平纹机织多元多层碳化硅陶瓷基复合材料,按照"从底向上"的顺序考虑了纤维丝/界面/基体尺度以及纤维束/基体/涂层尺度下的微结构有限元模型。采用能量法依次进行了两个尺度上的等效性能计算,首先在纤维丝/界面/基体的尺度上计算了纤维束的等效弹性参数,然后将这些参数代入到纤维束/基体/涂层尺度微结构模型中,计算得到复合材料的整体弹性常数。数值计算结果与实验结果吻合较好,验证了所提计算方法以及模型的有效性。The bottom-up multi-scale finite element modeling based on the sequential consideration of the fiber/ interface/matrix scale and the tow/matrix/coat scale is employed to study the plain weave multi-phase and multi-layer silicon carbide ceramic matrix composite. The strain energy-based method is adopted for the multi-scale analysis and evaluation of effective properties. First, the effective properties of tows are computed on the fiber/interface/matrix scale. Then these properties are incorporated into the microstructure on the tow/matrix/coat scale and the effective properties of the composite are obtained. Numerical results obtained by the proposed method and model are shown to agree well with the results measured experimentally.

关 键 词：碳化硅陶瓷基复合材料 平纹机织 多元多层 能量法 多尺度分析 数值预测 

分 类 号：TB332[一般工业技术—材料科学与工程]