三维编织复合材料理论研究进展

有关三维编织复合材料的理论分析研究归纳为:基于细观结构几何模型的物理性能研究和力学性能研究两部分.纤维体积分数是物理性能研究的最主要参数,力学分析以复合材料的弹性性能为主.合理的几何模型决定了力学性能分析与试验结果的一致性.建立在代表性体积单元尺度的几何模型应用最为广泛,得到了力学性能的试验验证.三维编织复合材料的力学性能的数值仿真主要以有限元方法为主,然而仅仅依赖于对其弹性性能的研究结果还远远不能满足三维编织复合材料作为关键结构部件的使用要求,建立完善的断裂准则是编织复合材料大量使用的理论依据.特殊形状的一次性编织复合材料的力学性能研究有待进一步深入.

Progressing in the Research on 3D Braided Composites

The research on 3D braided composites can be classified with the research of physical performances based on mesoscopic geometrical model and mechanical properties.The fibre volume fraction is the primary physical performance parameter,while the mechanical research focuses on the composite elastic properties.The rational geometrical model determines the compatibility of the research on mechanical properties and the result of experiment.The geometrical model built in the scale of representative volume unit is wildly applied and is justified by mechanical experiment.Though the finite element analysis is a primary method for the numerical simulation research,the only elastic properties research on 3D braided composites is not enough when it is used in the key components,building the perfect fracture criterion is theoretical basis for its widespread availability.The complex form component must be further studied on the mechanical properties of 3D braided composites.