Research progress on the permeability prediction of f iber in RTM
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摘要: 对国内外在RTM 成型工艺中的渗透率预测方法进行了文献回顾。系统论述了理论分析法和数值模拟法, 评析了各方法中模型存在的问题, 比较了模型间的不足。理论分析法中详细介绍了毛细管模型和规则排列柱阵模型在单向纤维渗透率预测中的应用。数值模拟法中重点介绍了均匀化法、Boltzman 网格法和单胞法对单向纤维和平面机织纤维渗透率的预测。回顾了国内对渗透率预测的研究, 其方法主要以实验分析为基础, 分析了纤维结构与渗透率的关系, 讨论了渗透率特性对工艺过程的影响规律。提出了目前在渗透率预测研究中仍然存在的一些不足, 指出了该领域将来的研究方向。Abstract: In this paper , research on permeability prediction in RTM process is reviewed based on the study report sin this area both at home and abroad. Several classical models in the analytical method and numerical method aresystematically discussed. The numerical methods applied in permeability prediction are elaborated. The existingproblems in models are also analyzed. A comparison is made between the models to evaluate their respective disadvantages. This article gives a description of the capillary model and regular cylinder model for permeability prediction of unidirectional reinforcement s in details. It also report s the numerical method for permeability prediction ofunidirectional reinforcement s and woven preforms focusing on the asymptotic homogenization method , Lattice-Boltzman method and cell method. The study for permeability estimation of fiber is mainly reviewed based on experimentation at home , the relationship between fiber st ructure and permeability parameter is analyzed , and the effect ofpermeability on resin t ransfer molding progress is studied. Af ter a brief review of the current problems in this arearecent development s and new t rends of research are also described.
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Keywords:
- permeability /
- prediction /
- RTM /
- analytical method /
- numerical method
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