Finite element modeling of consolidation of composite laminates
Finite element modeling of consolidation of composite laminates
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DOI：
10.1007/s10409-005-0092-0
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发表时间：
2006-01
影响因子：
3.5
通讯作者：
Xiangqiao Yan
中科院分区：
文献类型：
--
作者：
Xiangqiao Yan
先进纤维增强聚合物复合材料已越来越多地应用于各种结构部件。热压罐辅助预浸料铺层是制备高性能层合复合材料的重要工艺之一。由于层压复合材料的质量在很大程度上受到固化周期的影响，因此为每种应用选择合适的固化周期非常重要，必须进行优化。因此，固结和固化过程的一些基本模型对于为特定应用选择合适的参数是必要的。本文研究了复合材料热压过程中的“流动-收缩”模型。采用加权余量法，建立了热固性厚复合材料固结过程的二维有限元列式，并编制了相应的有限元程序。数值例子，包括比较目前的数值结果与一维和二维的解析解，给出了说明所提出的有限元公式的准确性和有效性。此外，固结模拟的AS 4/3501-6石墨/环氧树脂层合板进行，并与文献中的实验结果进行了比较。
Advanced fiber reinforced polymer composites have been increasingly applied to various structural components. One of the important processes to fabricate high performance laminated composites is an autoclave assisted prepreg lay-up. Since the quality of laminated composites is largely affected by the cure cycle, selection of an appropriate cure cycle for each application is important and must be optimized. Thus, some fundamental model of the consolidation and cure processes is necessary for selecting suitable parameters for a specific application. This article is concerned with the ``flow-compaction'' model during the autoclave processing of composite materials. By using a weighted residual method, two-dimensional finite element formulation for the consolidation process of thick thermosetting composites is presented and the corresponding finite element code is developed. Numerical examples, including comparison of the present numerical results with one-dimensional and two-dimensional analytical solutions, are given to illustrate the accuracy and effectiveness of the proposed finite element formulation. In addition, a consolidation simulation of AS4/3501-6 graphite/epoxy laminate is carried out and compared with the experimental results available in the literature.