三维全五向编织复合材料的特性及制备

三维编织复合材料是一种先进复合材料,在航空航天等尖端领域的应用越来越广泛。本文分析了传统三维编织复合材料的优势、用途及存在的缺陷和不足,并提出了改进该材料性能的可能途径,即发展一种新的三维全五向编织复合材料。针对三维全五向编织复合材料这种新型的编织形式,提出了几种可能的工艺实现途径,指出用四步法编织是对材料性能影响最小,最可能实现工业化生产的途径。最后,以三维全五向编织法兰为例,对其在制备过程中的材料选择、模具设计及固化工艺进行了详细的讨论。

The Properties and Fabrication of Three-dimensional AllFive-directional Braided Composites

Three-dimensional (3D) braided composites are a kind of advanced composite materials. They are widely used in the aeronautical and astronautical fields. In this paper, the advantages, usages, shortages and disadvantages of 3D braided composites are analyzed, and possible routes to improve the properties of the materials are presented. A new type of 3D braided composites, 3D all five-directional braided composites are developed. The methods of making this type of preform are proposed. It is pointed that four-step braiding which is most possible to bring about industrialization almost has no effect on the composite performances. Finally, take an example for 3D all 5-directional braided composites flange was taken as an example, the preparation process of material selection, mold design and curing process are discussed and designed in detail.