Experimental and theoretical studies of fabric compaction behavior in resin transfer molding
Experimental and theoretical studies of fabric compaction behavior in resin transfer molding
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DOI：
10.1016/s0921-5093(01)01175-3
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发表时间：
2001-10-31
期刊：
影响因子：
6.4
通讯作者：
Chou, TW
中科院分区：
文献类型：
--
作者：
Chen, BX;Lang, EJ;Chou, TW
对树脂传递模塑过程中织物预成型件的压实行为进行了实验和理论研究。对连续原丝毡、平纹机织物和单向针织材料三种预制件进行了压实实验。确定了影响预成型件压实行为的主要因素。然后，使用 TekScan 系统测量压实过程中相邻织物层之间的原位接触压力。压力测量的结果促进了现有压实模型的改进。因此，本文的理论部分侧重于对具有均匀、线性和正弦层间接触压力分布的机织织物预成型件的压实行为进行建模。已经建立了纤维体积分数、施加的压缩力和预成型件厚度减少之间关系的解析表达式。最后，应用改进的模型来预测压实下预成型件树脂通道的几何形状。这些知识可以很容易地用于评估树脂渗透性作为树脂传递模塑过程中施加压力的函数。 (C) 2001 Elsevier Science B.V. 保留所有权利。
Experimental and theoretical studies have been conducted on the compaction behavior of fabric preforms in the resin transfer molding process. Compaction experiments were carried out for three types of preforms, i.e. continuous strand mats, plain woven fabrics, and unidirectional knitted materials. The major factors contributing to the preform compaction behavior were identified. Then, in-situ contact pressure between adjacent fabric layers during compaction was measured using a TekScan system. The results of the pressure measurement motivated the improvement in the existing compaction model. Thus, the theoretical part of this paper focuses on modeling the compaction behavior of woven-fabric preforms with uniform, linear, and sinusoidal inter-layer contact pressure distributions. Analytical expressions for the relations among the fiber volume fraction, the applied compressive force, and the preform thickness reduction, have been established. Finally, the improved model is applied to predict the geometry of the resin channels of the preform under compaction. This knowledge can be readily used for evaluating the resin permeability as a function of applied pressure in the resin transfer molding process. (C) 2001 Elsevier Science B.V. All rights reserved.