Longitudinal and transverse flows in fiber tows: Evaluation of theoretical permeability models through numerical predictions and experimental measurements

被引：29

作者：

Zarandi, M. Amin F. ^{[1
]}

Arroyo, Salvador ^{[1
]}

Pillai, Krishna M. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Mech Engn, Lab Flow & Transport Studies Porous Media, Milwaukee, WI 53211 USA

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2019年 / 119卷

关键词：

Permeability; Tow permeability; LCM; RTM; VARTM; Voids; Dual-scale; Tows; Fiber bundle; Closure formulation; Stokes flow; SELF-CONSISTENT METHOD; UNSATURATED FLOW; FIBROUS MEDIA; SPONTANEOUS IMBIBITION; GOVERNING EQUATIONS; PERIODIC ARRAY; VOID FORMATION; PART; LIQUID; SIMULATION;

D O I：

10.1016/j.compositesa.2018.12.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tow permeability is a very important input in the dual-scale flow and void formation studies in Liquid Composite Molding processes for manufacturing polymer composites. In this comparative study aimed at checking the accuracy of various theoretical models for permeability, we evaluated the permeability of unidirectional fibrous media at tow scale for flow transverse and parallel to the fiber directions. The falling-head parameter was adapted to measure the permeability along and across the fibers within tows for three different cases of fiber volume fractions (fvf). Unit cells corresponding to the measured fvf and fiber diameters were generated using GeoDict. Two separate simulations, one using GeoDict to solve Stokes flow and the other using COMSOL to solve Whitaker's closure-formulation, were done. Eighteen different analytical models were evaluated.

引用

页码：73 / 87

页数：15