纺织学报 ›› 2022, Vol. 43 ›› Issue (12): 69-74.doi: 10.13475/j.fzxb.20210904006

• 纺织工程 • 上一篇    下一篇

碳化硅纤维预制体编织损伤特性研究

郭伟娜, 辛三法, 胡文锋, 高彦涛()   

  1. 上海工程技术大学 纺织服装学院, 上海 201620
  • 收稿日期:2021-09-13 修回日期:2022-05-08 出版日期:2022-12-15 发布日期:2023-01-06
  • 通讯作者: 高彦涛
  • 作者简介:郭伟娜(1999—),女,硕士生。主要研究方向为SiC纤维复合材料预制体及其复合材料性能。
  • 基金资助:
    国家自然科学基金青年基金项目(11802317)

Study on damage performance of silicon carbide fiber bundles in braiding process

GUO Weina, XIN Sanfa, HU Wenfeng, GAO Yantao()   

  1. School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2021-09-13 Revised:2022-05-08 Published:2022-12-15 Online:2023-01-06
  • Contact: GAO Yantao

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摘要：

针对编织过程中碳化硅(SiC)纤维束的摩擦磨损会导致其可编织性下降等问题,在传统抱合力机基础上通过自制载荷可控的抱合夹具,模拟SiC纤维束在编织过程中与机械部件之间的摩擦行为,研究了法向载荷、摩擦速度和摩擦次数对SiC纤维束磨损行为的影响。研究表明:SiC纤维拉伸断裂表现出明显的脆性断裂行为,SiC纤维束的摩擦断裂循环次数随着法向载荷和摩擦速度的增加而显著减少,拉伸强度和断裂伸长率随着摩擦次数的增加而明显降低;当摩擦次数增加到100次时,SiC纤维束的拉伸断裂强力和断裂伸长率较原样分别减小了73%和53%;随着摩擦次数的增加,SiC纤维束破坏主要经历纤维分散、纤维起毛和纤维断裂等损伤过程。

关键词: SiC纤维束, 法向载荷, 摩擦次数, 磨损行为, 编织工艺

Abstract:

In view of the problem that the abrasion of silicon carbide (SiC) fiber bundles during the braiding process will lead to decrease of its braidability, the frictional behavior between SiC fiber bundles and mechanical components was simulated by a self-made load controllable clamping fixture based on the conventional clamping force machine (Y731D). The effects of normal load, friction speed and cyclic number of frictions on the wear behavior of SiC fiber bundles were investigated. The study shows that the tensile fracture of SiC fibers exhibited obvious brittle fracture behavior, the number of frictional fracture cycles of SiC fiber bundles decreased significantly with the increase of normal load and frictional speed, and the tensile strength and elongation at break decreased significantly with the increase of friction times. After 100 times cyclic friction, the tensile strength and elongation at break of SiC fiber bundles are decreased by 73% and 53%, respectively, compared with the original sample. It is observed that the major type of damages experienced by the SiC fiber bundles are fiber dispersion, fiber pick and fiber fracture.

Key words: SiC fiber bundle, normal load, number of friction, wear behavior, braiding process

中图分类号: 

  • TQ343+.6

图1

模拟实验装置示意图"

图2

纤维束摩擦过程示意图"

图3

拉伸测试示意图"

表1

几种纱线的相关参数"

类别 断裂强度/N 断裂伸长率/%
SiC纤维束 160.25 1.01
纯棉纱线 5.98 11.50
羊毛/腈纶混纺纱线 8.40 14.31
涤纶长丝 7.63 20.45

图4

SiC纤维断口形貌图"

图5

不同摩擦次数下SiC纤维束的摩擦形貌图"

表2

不同摩擦次数下SiC纤维束的力学性能"

摩擦次数 拉伸强力/N 断裂伸长率/%
0 160.25 1.01
40 92.30 0.60
70 71.50 0.49
100 43.95 0.47
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