Void Formation Model and Measuring Method of Void Formation Condition During Hot Pressing Process
Void Formation Model and Measuring Method of Void Formation Condition During Hot Pressing Process
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热压过程中空洞形成模型及空洞形成条件测量方法
DOI：
10.1002/pc.20944
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发表时间：
2010-09-01
影响因子：
5.2
通讯作者：
Sun, Zhijie
中科院分区：
文献类型：
--
作者：
Gu, Yizhuo;Li, Min;Sun, Zhijie
对于树脂基复合材料，孔隙是一种常见的缺陷，它会严重影响复合材料的性能。因此，消除空隙是控制复合材料部件制造过程的关键因素。本文主要研究了热压工艺制备的树脂基复合材料层合板中吸湿水引起的孔隙形成。建立了Kardos空穴形成模型，分析了空穴形成的临界树脂压力，并通过实验研究了影响空穴形成的因素，验证了修正模型的正确性。研究发现，树脂压力和凝胶温度是控制孔隙缺陷的两个关键参数，在孔隙形成模型中必须考虑预浸料叠层中夹带的空气。此外，建立了一种简单的方法来测量孔隙率与工艺参数之间的关系，并研究了树脂和预浸料堆的孔隙形成条件。理论预测的空洞形成条件和实验结果是兼容的研究情况。研究结果对消除孔洞缺陷、优化工艺参数、提高复合材料制件性能具有重要意义。Polym.比较器：31：1562- 1571，2010. (C)2009年塑料工程师学会
For resin matrix composites, voids are common defects that can seriously deteriorate the properties of the composite parts. Thus, the elimination of voids is a crucial element in controlling the manufacturing process of composite parts. This article focuses on void formation originating from hygroscopic water for resin matrix composite laminates prepared with hot pressing process. The Kardos void formation model was developed to analyze the critical resin pressure for the initiation of voids, and the influencing factors were investigated experimentally to validate the modified model. It is found that resin pressure and gel temperature are the two key parameters to control void defects and that entrapped air in prepreg stacks must be considered in the void formation model. Furthermore, a simple method was established to measure the relationship between porosity and the processing parameters, and the void formation conditions of the resin and the prepreg stack were also studied. The theoretically predicted void formation conditions and the experimental results were compatible for the studied cases. These results are valuable for eliminating void defects, optimizing processing parameters, and enhancing the performance of composite parts. POLYM. COMPOS., 31:1562-1571,2010. (C) 2009 Society of Plastics Engineers