不同的表面处理对针织碳纤维复合材料的影响分析(英文)

A Study on Knitted Carbon Fabrics with Different Surface Treatment and their Composites

纤维复合材料已经研究了数十年了。他们有着比传统材料,如钢材,优秀的多的力学性能。然而,由于相对较低的产量,梭织、编织与其3D纤维结构的复合材料被认为较难大量生产。因此,近年来,针织物在复合材料界获得了较高的关注,它的高度可塑性使针织复合材料可以直接生产制造成各种复杂形状的复合材料如管状、圆锥型等,使得材料的浪费可以降到了最低。本文使用了有表面处理和没有表面处理的纬编平针碳纤维制成复合材料。对两种复合材料的经向和纬向分别做了拉伸试验。结果显示:有表面处理的材料具有更好的拉伸性能,尤其是在wale方向上,有表面处理的复合材料比没有表面处理的复合材料的拉伸强度提高75.68%。

Textile composites have been under researches for decades. They are found excellent mechanical properties as compared to traditional materials such as metals. However owning to the relatively low fabrication efficiency, woven, braids and their 3D textiles structures composites are considered difficulties for mass production. Therefore,recently, knitted fabric reinforcements have gained much attention in the composites industry. This is attributed to the unique properties of knitted fabrics compared with other reinforcement fabric structures, such as woven and braid. Its high ability of deformability makes knitted fabric reinforcement formable into desired complex preform shapes to produce the composite component. Moreover, the use of advanced knitting machines allows the production of near net shape fabrics such as domes, cones and so one. The use of near net shape preforms has the advantage of minimum material wastage. These two properties of knitted fabric allow the mass produce and reduce the production time, and thus lower the cost of composite material. Knitted fabric has great po- tential in composites industry. At current study, weft knitted carbon fiber fabrics with and without surface treatment were fab- ricated and used as the reinforcements in composites. The composites were tested by tensile test in course and wale direc- tions. The results show the composite of the fabric with surface treatment has better tensile properties.