立体多向编织结构对复合材料性能的影响

INFLUENCE OF THREE DIMENSIONAL AND MULTIDIRECTIONAL BRAID STRUCTURES ON THE PROPERTIES OF COMPOSITES

本文采用１×１，１×２和１×３三种不同的编织结构对轴向增强和非增强三维多向编织复合材料的性能进行了研究。对编织复合材料的拉伸强度、刚度和弯曲强度、刚度进行了实验分析。结果表明：三维编织复合材料具有良好的性能。编织结构对复合材料性能有较大的影响。纤维表面编织角和纤维体积比是影响复合材料性能的重要结构参数。通过轴向加入非编织增强纤维，使编织复合材料的拉伸强度和模量，弯曲强度和模量有了较大改善。

In this paper, a study was made on the properties of three dimensional and multidirectional braided composites with and without axial reinforcement under three braid stuctures 1×1,1×2 and 1×3. The tensile strength and modulus, flexural strength and modulus of the composites were tested and analyzed. The results show that the three dimensional braided composite has good behaviour, and the braid structures have a great influence on it. The fiber apparent angle and fiber volume fraction are two important factors in the improvement of properties. By means of adding in axially non braiding reinforced fibers, the properties of braided composites including tension and bending have been improved considerably.