【摘要】 在对三维四步(1×1)编织物结构分析的基础上,进一步完善了基元、面元和角元的三细胞模型,使修正后的模型实现了空间上的几何连续性,较为真实地模拟了编织预制件的纤维走向。然后,基于修正后的三细胞模型并采用刚度平均法预测了三维编织复合材料的弹性性能,通过与现有实验结果的比较,验证了该模型的适用性。更多还原

【Abstract】 On the basis of structural analysis for the three-dimensional four-step(1×1) braided composites, further improvement was made on the three-cell model which includes interior,surface and corner cells. The modified model realizes the geometric continuity of the fibers in the space, and also really simulates the moving orientation of fibers in the braided preforms. Based on this model, we predicted the elastic properties of three-dimensional and four-directional braided composites with the method of stiffness averaging. Comparison of the calculating results with the available experimental data shows the applicability of the present model.更多还原