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首页> 外文期刊>Advanced Composites Letters >STATE OF THE ART ON PERMEABILITY CHARACTERIZATION OF FIBROUSREINFORCEMENTS USED IN RESIN TRANSFER MOLDING PROCESS
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STATE OF THE ART ON PERMEABILITY CHARACTERIZATION OF FIBROUSREINFORCEMENTS USED IN RESIN TRANSFER MOLDING PROCESS

机译：树脂转移成型过程中纤维增强材料渗透性表征的研究进展

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摘要

The physical and mathematical fundamentals that are required for the measurement of permeability of fibrous reinforcement used in Resin Transfer Molding (RTM) and to interpret correctly the results of those experiments are considered in this article. The basic concepts of fluid dynamics through porous media applied to the analy-sis of the impregnation phenomena in fibre preforms are discussed. The principal assumptions to simplify the governing equations into the Darcy's law are summarized in order to give an idea of some typical features of the permeability tests regarding the injection parameters and types of fluids and preforms used. Three impor-tant concepts for determining permeability in any direction for anisotropic preforms are introduced: permeabil-ity tensor (Ku), permeability ellipse and effective permeability (K_(eff)). This paper also deals with the deduction, from Darcy's law and Laplace Equation, of the basic equations used on the unidirectional and divergent radial permeability tests. The final conclusion remarks the importance of the concepts exposed in this work.
机译：本文考虑了用于树脂传递模塑（RTM）的纤维增强材料渗透性的测量所需的物理和数学基础，并正确解释了这些实验的结果。讨论了通过多孔介质进行流体动力学的基本概念，将其应用于纤维预成型件中的浸渍现象分析。总结了将控制方程式简化为达西定律的主要假设，以便对渗透率测试的一些典型特征（注入参数和所用流体和预成型件的类型）有所了解。引入了三个重要的概念来确定各向异性预成型坯在任何方向的磁导率：磁导率张量（Ku），磁导率椭圆和有效磁导率（K_（eff））。本文还讨论了从达西定律和拉普拉斯方程推导的用于单向和发散径向渗透率测试的基本方程。最后的结论表明了这项工作中所揭示的概念的重要性。

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