根据细编穿刺复合材料的细观和微观结构,分别建立了纤维束和细编穿刺单胞有限元模型。采用周期性非绝热温度边界条件,计算了纤维束和材料整体的等效热导率。计算结果与经验公式比较,具有高度的一致性。在此基础上,进一步研究了纤维体积分数、基体和纤维热导率对材料热导率的影响。结果表明,随着纤维含量的增加,材料两个方向热导率均有不同程度的下降,且差异逐渐减小,且基体对热导率影响作用较大。文中采用的模型和周期性边界条件与理论预期符合较好,为材料热学和热力耦合问题的分析提供了有用参考。 According to the meshes and microstructures of finely woven punctured composite materials, finite element models of fiber bundles and fine punctured cells were established respectively. Using the periodic non-adiabatic temperature boundary conditions, the equivalent thermal conductivities of the fiber bundles and the material as a whole are calculated. The calculated results are highly consistent with the empirical formula. On this basis, further study of the fiber volume fraction, the matrix and the fiber thermal conductivity on the thermal conductivity of the material. The results show that with the increase of fiber content, the thermal conductivity decreases in different degrees in both directions, and the difference decreases gradually, and the effect of matrix on thermal conductivity is larger. The model and periodic boundary conditions used in this paper are in good agreement with the theoretical predictions and provide a useful reference for the analysis of thermal and thermal coupling of materials.