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.
出处
《航空学报》
EI
CAS
CSCD
北大核心
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)
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
silicon carbide ceramic matrix composite
plain weave
multi-phase and multi-layer
strain energybased method
multi-scale analysis
numerical prediction
