纤维束及非弯折织物渗透率预测公式的研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (7): 20-25.

纤维束及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:2016-01-19 出版日期:2016-07-28 发布日期:2016-07-28
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(51175016)

STUDY ON PERMEABILITY PREDICTING FORMULA OF FIBER BUNDLES AND NON-CRIMPED FABRICS

KANG Ning, LIANG Xuan-yong

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

Received:2016-01-19 Online:2016-07-28 Published:2016-07-28

摘要/Abstract

摘要： 根据数值模拟结果,对Gebart公式进行了修正,研究了NCF单胞渗透率与结构参数的关系,得到了NCF单胞渗透率预测公式。对于纤维束,平行方向的数值结果及修正公式在较高孔隙率下比Gebart公式更接近于实验结果;对NCF单胞模型渗透率计算,与实验结果误差为5%;对5种纤维束孔隙率的NCF单胞分别进行正交试验,得到渗透率的数值结果,拟合出了预测公式;NCF渗透率预测公式结果与数值结果对四方和六方排列的平均误差为4.60%和4.57%,说明了预测公式的准确性。

关键词: RTM, 纤维束, 非弯折织物, 渗透率

Abstract: The results of CFD (Computational Fluid Dynamics) was applied to modify the Gebart formula to predict the permeability of fiber bundles. The relationship between permeability and structure parameters of non-crimp fabrics (NCF) was inverstigated and the permeability predicting formula of NCF was obtained. The numerical and modified formula′s results of flow parallel to fiber bundles were closer to the experimental results than the Gebart formula′s results, especially at high porosity. The error between the numerical and experimental results of the NCF unit cell is 5%. Orthogonal experimentals were carried out on NCF composed of fiber bundles with 5 different porosities. The permeability predicting formula of NCF was fitted on the basis of the numerical results of orthogonal tests. The average errors between the numerical and predicting formula′s results were 4.60% for quadratic arrangement and 4.57% for hexagonal arrangement, which verified the accuracy of the permeability predicting formula.

Key words: RTM, fiber bundles, non-crimped fabrics, permeability

中图分类号:

TB332

康宁, 梁玄勇. 纤维束及非弯折织物渗透率预测公式的研究[J]. 玻璃钢/复合材料, 2016, 0(7): 20-25.

KANG Ning, LIANG Xuan-yong. STUDY ON PERMEABILITY PREDICTING FORMULA OF FIBER BUNDLES AND NON-CRIMPED FABRICS[J]. Fiber Reinforced Plastics/Composites, 2016, 0(7): 20-25.

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