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考虑了相邻纤维束之间的界面粘接效应,建立了考虑纤维束间粘接层的三维四向编织复合材料单胞有限元模型,较为真实地模拟了该材料的细观结构,讨论了相应的边界条件和约束条件,并采用有限元方法计算了该材料的等效弹性性能参数,计算结果与实验值符合较好。研究了等效弹性性能参数随不同编织角及体积分数的变化关系,得到了体胞的细观应力场,为强度分析提供数据。
Considering the interfacial bonding effect between adjacent fiber bundles, a three-dimensional finite element model of a four-directional braided composite material considering the bonding layer between the fiber bundles is established, and the mesostructure of the material is simulated more accurately The corresponding boundary conditions and constraints, and using the finite element method to calculate the equivalent elastic properties of the material parameters, the calculated results in good agreement with the experimental value. The relationship between equivalent elastic parameters and different braid angles and volume fractions was studied. The mesoscopic stress field of somatic cells was obtained, which provided the data for the strength analysis.