论文部分内容阅读
论文根据三维编织复合材料的结构特点,把整体结构分为内部单胞、表面单胞和角单胞三种类型的子单胞,考虑空间纤维束的相互扭结和挤压所造成的纤维束的弯曲和截面变形,针对每种类型的子单胞,建立了相应的几何分析模型.引入周期性位移边界条件,建立了材料的弹性性能预报模型,得到了三维编织复合材料的工程弹性常数.通过数值比较可以看出,论文所给出的数值计算结果与实验结果吻合较好,从而验证了本文模型的有效性.
According to the structural characteristics of three-dimensional braided composites, the paper divides the whole structure into three types of subunits: internal unit cell, surface unit cell and angle cell. Considering the kink and squeeze of the space fiber bundle, Bending and cross-section deformation, the corresponding geometric analysis model is established for each type of subunit. The periodic elastic boundary conditions are introduced to establish the elastic modulus prediction model of the material and the engineering elastic constants of the three-dimensional braided composite material are obtained. Numerical comparison shows that the numerical results given in the paper are in good agreement with the experimental results, which verifies the effectiveness of the proposed model.