椭圆边非弯折织物渗透率预测公式的研究

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (1): 30-35.

椭圆边非弯折织物渗透率预测公式的研究

康宁, 梁玄勇

北京航空航天大学交通科学与工程学院,北京100083

收稿日期:2016-06-16 出版日期:2017-01-28 发布日期:2017-01-28
作者简介:康宁(1963- ),女,博士,副教授,主要从事流体仿真方面的研究,kangning@buaa.edu.cn。
基金资助:
国家自然科学基金项目(NO.51175016)

RESEARCH ON PERMEABILITY PREDICTING FORMULA OF NON-CRIMPED FABRICS WITH FIBERS OF ELLIPSE EDGE

KANG Ning, LIANG Xuan-yong

School of Transportation Science and Engineering, Beihang University, Beijing 100083, China

Received:2016-06-16 Online:2017-01-28 Published:2017-01-28

摘要/Abstract

摘要： 将NCF的纤维束两侧近似为半椭圆,对NCF单胞设计五因素五水平正交试验,利用CFD方法得到渗透率的数值结果,进而拟合出预测渗透率的椭圆边公式。对于纤维束四方排列的NCF单胞,椭圆边公式的计算结果和数值结果平均误差为1.91%;对于六方排列,平均误差为1.90%。对NCF渗透率的预测结果和实验结果的相对误差为0.22%,小于矩形边公式的误差3.96%。当束间间距w₁与椭圆边的半长轴c₁之比小于0.8时,两预测公式值之比大于1.1。说明椭圆边公式对NCF材料渗透率的预测更加准确,适用范围更广。

关键词: RTM, 非弯折织物, 渗透率, 预测公式

Abstract: The results of CFD (Computational Fluid Dynamics) were applied to fit the ellipse edge formula for predicting permeability of NCF while the edge of fibers was approximated as semi-ellipse. Orthogonal tests of 5 factors and 5 levels were carried out on the NCF unit cell. The average error between numerical and the ellipse edge formula's results is 1.91% for quadratic arrangement and 1.90% for hexagonal arrangement. The error between experimental and the ellipse edge formula's result is 0.22%, which is smaller than the error of 3.96% between experimental and the rectangle edge formula's result. The ratio between the result of ellipse edge formula and rectangle edge formula is over 1.1, when the ratio between the width W₁ between fiber bundles and the major semi-axis c₁ of ellipse edge is less than 0.8. The results verified that the ellipse edge formula was more accurate and the application was broader.

Key words: RTM, non-crimped fabrics, permeability, predicting formula

中图分类号:

TB332

康宁, 梁玄勇. 椭圆边非弯折织物渗透率预测公式的研究[J]. 玻璃钢/复合材料, 2017, 0(1): 30-35.

KANG Ning, LIANG Xuan-yong. RESEARCH ON PERMEABILITY PREDICTING FORMULA OF NON-CRIMPED FABRICS WITH FIBERS OF ELLIPSE EDGE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(1): 30-35.

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