中文摘要：

借助绘图软件PRO／E构建出不同经密的三维浅交弯联机织复合材料结构模型。使用有限元分析软件ANSYS对构建出的复合材料三维模型在位移为1mm的弯曲载荷作用下复合材料的弯曲力学性能进行模拟，并分别对纤维、树脂的应力、应变分布进行模拟，分析其弯曲破坏机理。并通过定性实验，得到了与模拟结果相同的结论，验证了模拟结果的准确性。结果表明：在1mm的弯曲载荷作用下经密为4根／cm的复合材料弯曲性能优于经密为3根／cm的复合材料；复合材料与弯曲试样接触的位置更容易发生破坏；该复合材料模型在1mm的弯曲载荷作用下破坏模式主要为树脂的破碎、纤维与树脂间的脱粘。

英文摘要：

3D curved shallow-crossing linking woven composites structural model with different warp density were built by mapping software Pro/Engineer. The distribution of stress ＆ strain on fibers, resin and 3D composites, as well as the failure mode, was discussed and predicted respectively, under bending loads of 1mm displacement, using finite element software ANSYS. Qualitative analysis is carried on to compare the numerical modeling results with the experimental results, and get similar conclusion. The results show that, under the 1mm bending loads, flexural pro perry of 3D composites which warp density is 4/cm is better than that warp density is 3/cm; the most easily damaging parts of the 3D composites occurred on the point-surface contacts, where the samples contacted with the up and down pressure heads; the main failure mode of the 3D composites is resin fracture and separation between fibers and resin, under bending loads of 1 mm displacement.