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中文摘要：
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。
英文摘要：
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.
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