液体模塑成型工艺中纤维束横向渗透率的细观数值模拟  

Microscopic numerical simulation of transverse permeability of fiber bundles in liquid composite molding

作　　者：李永静[1] 晏石林[1] 李德权[1] 严飞[1] 

机构地区：[1]武汉理工大学理学院,湖北武汉430070

出　　处：《纺织学报》2015年第8期22-27,共6页Journal of Textile Research

摘　　要：将纤维束视为多孔介质,基于达西定律,对纤维束横向渗透率进行细观数值模拟研究。首先建立了纤维束横截面单丝规则及随机分布的细观数值分析模型,在给定压力梯度下实现了对纤维束横向渗透率系数的数值预报;其次研究了纤维束内孔隙率不变时,模型尺寸对渗透率计算结果的影响,分析了计算模型的尺寸效应,确定了纤维束横向渗透率计算的最小细观数值模型尺寸;最后进行了不同孔隙率下单丝随机分布的纤维束横向渗透率数值分析,得到了孔隙率对横向渗透率的影响规律,并与建立在单丝规则排列基础上的Gebart模型和Cell模型做对比。This paper treated the fiber bundles as porous media and researched the transverse permeability by the microscopic simulation based on Darcy law. Firstly,it builds the regular and random distribution microscopic numerical analysis models for the cross section of fiber bundles and calculates the transverse permeability of the fiber bundles under a constants pressure gradient; Secondly,it investigates the influence of the model size on the permeability values under a constant porosity,analyzes the size effect of computation model and determines the minimal size of the microscopic numerical analysis model to predict the transverse permeability; Finally,it calculates and analyzes the transverse permeability of the fiber bundles within fiber randomly distributed at different porosities,and obtains the influence rule of the porosity to the permeability values,which is compared with the results of the Gebart model and the Cell model.

关 键 词：液体模塑成型 横向渗透率 数值模拟 数据拟合 

分 类 号：O351.3[理学—流体力学] TS151[理学—力学]