不同机织结构碳布针刺后拉伸性能

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不同机织结构碳布针刺后拉伸性能
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作者单位:西安航天复合材料研究所
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Tensile Stress of Needled Carbon Cloth With Different Woven Structures

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摘要:

针刺后碳布拉伸强力的大小决定了针刺预制体的性能,研究针刺后碳布拉伸强力可以为针刺工艺

参数优化、提高预制体性能提供重要参考。本文研究了不同机织结构碳布针刺前、后的拉伸性能及影响拉伸强力

的主要因素。在3K 平纹碳布、3K 斜纹碳布及3K 缎纹碳布中,3K 斜纹碳布具有较高的拉伸强力、较大的拉伸强

力保留率,针刺工艺性最好。在一定的针刺工艺下,碳布各层拉伸强力可以用函数y = A1 伊e-x / t1 + y0 来模拟,其中

A1、t1、y0为常数。针刺密度是影响针刺后碳布拉伸强力及强力保留率的主要因素,最终针刺密度决定了针刺后碳

布拉伸强力的大小。3K 斜纹碳布在针刺密度为26 针/ cm2 时,经、纬向的拉伸强力与未针刺时相比分别下降了

42.0%和49.1%;当针刺密度为32 针/ cm2时,其经、纬向拉伸强力则分别下降了71.4%和78郾8%。

Abstract:

Carbon cloth was a key material for preparing the 3D woven performs. The property of needled perform

was decided by the tensile stress of carbon cloth after needling. The tensile stress of needled carbon cloth could provide

a reference for optimizing technical parameters and improving properties of performs. The tensile stress and the factors

that affect the stress of carbon cloth were studied. Among the 3 K plain carbon cloth, the 3K twill carbon cloth and the

3K satin carbon cloth, the 3K twill carbon cloth has a high tensile stress and stress retention and shows the best techno鄄

logical properties. Under a certain process, the tensile stress of the needled carbon cloth can be simulated by a function

ofy = A1 伊e-x / t1 + y0, in which A1, t1 and y0 are constants. The needle punching density was the most important factor

that affected the tensile stress ant the stress retention percent, and the final needle punching density decided the tensile

stress. When the needle punching density was 26 n/ cm2, the stress of warp and weft direction of 3K twill carbon cloth

decreased 42. 0% and 49. 1% respectively, and when the needle punching density was 32 n/ cm2, the number was

71郾4% and 78.8%.

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纪伶伶.不同机织结构碳布针刺后拉伸性能[J].宇航材料工艺,2013,43(5).

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在线发布日期: 2016-11-28
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