缝线捻度对链式缝合复合材料的浸润及力学性能影响

复合材料科学与工程 ›› 2013, Vol. 0 ›› Issue (6): 21-26.

缝线捻度对链式缝合复合材料的浸润及力学性能影响

陈吉平^*, 苏佳智, 郑义珠

上海飞机制造有限公司,上海 200436

收稿日期:2012-12-11 出版日期:2013-09-28 发布日期:2022-03-15
作者简介:陈吉平,男,硕士,工程师,从事复合材料液体成型工艺研究,chenjiping@comac.cc。

INFLUENCE OF TWIST NUMBER ON SATURATION AND MECHANICAL PROPERTIES OF CHAIN-STITCH COMPOSITES

CHEN Ji-ping^*, SU Jia-zhi, ZHENG Yi-zhu

Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai200436,China

Received:2012-12-11 Online:2013-09-28 Published:2022-03-15

摘要/Abstract

摘要： 分别采用不同捻度的Kevlar-29 缝线对碳纤维层合板预成型体进行链式缝合,并进行VARI(真空辅助树脂渗透)成型。研究了不同捻度缝合板的拉伸、弯曲及层间剪切性能和不同捻度缝线与树脂的界面结合情况。实验结果表明: 缝合复合材料在缝线进行适当加捻之后,拉伸和弯曲强度都有不同程度提高,当捻度为80次/米时,分别较捻度为20次/米时提高了2.5%和9%,层间剪切强度降低了12%;且缝线捻度较低时,基本不会对树脂在缝线内部的浸润效果造成影响,捻度较高时,树脂渗透困难,对缝线浸润效果影响较大。

关键词: 链式缝合, 加捻, 拉伸, 弯曲, 层间剪切, 浸润

Abstract: The Kevlar-29 fiber yarns of different twist numbers are used to stitch carbon fiber laminate performs respectively with chain-stitch style, and then process them with VARI (vacuum assisted resin infusion). The tensile strength, flexural strength and interlaminal shearing strength of the composite laminates with different twist numbers are studied. The saturation of Kevlar yarns with different twist numbers in the resin matrix was also presented in this paper. The results show that the tensile and flexural strength of the stitched laminate will enhance in varying degrees with increase of twist number which the interlaminal shearing strength reduced. According to the test data, tensile and flexural strength of the stitched laminate (80m–1 ) enhance 2. 5% and 9% comparing with stitched laminate(20m–1 ), and the interlaminal shearing strength reduces 12%. Meanwhile, the resin can saturate the Kevlar yarns well when twist number is low which the result will be opposite with high twist number.

Key words: chain-stitch, twist, tensile strength, flexural strength, interlaminal shearing strength, saturate

中图分类号:

TB332

陈吉平, 苏佳智, 郑义珠. 缝线捻度对链式缝合复合材料的浸润及力学性能影响[J]. 复合材料科学与工程, 2013, 0(6): 21-26.

CHEN Ji-ping, SU Jia-zhi, ZHENG Yi-zhu. INFLUENCE OF TWIST NUMBER ON SATURATION AND MECHANICAL PROPERTIES OF CHAIN-STITCH COMPOSITES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(6): 21-26.

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