Formation and control of dry spot in resin transfer molding process of composite wings

被引：0
|
作者：
Song G. [1 ]
Zheng X. [1 ]
Liu Z. [1 ]
Chen N. [1 ]
机构：
[1] Institute of Aircraft Composite Structures, School of Aeronautics, School of Aeronautics, Xi'an
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 03期
关键词：
Composite wing; Dry spot; Fiber bulk density; Injection way; Process parameters;
D O I：
10.13801/j.cnki.fhclxb.20201030.003
中图分类号：
学科分类号：
摘要：
Based on resin transfer molding (RTM) process, a composite wing was fabricated. Aiming at the dry spot defect of the wing, PAM-RTM software was used to analyze the formation of dry spot. Because of the high volume fraction of fibers in the junction area of upper and lower wings and leading edges, the resin permeability in this area was lower than that in other areas, thus the envelope phenomenon appeared and the dry spot was formed. Two kinds of improved injection ways were designed to reduce the dry spot area. By comparison, it is found that the dry spot area produced by the front line injection method is significantly smaller, but the injection time increases. The resin viscosity can be reduced by increasing the injection temperature, thus the filling time is reduced. At the same time, the injection time can be further reduced by controlling the opening and closing of the outlet. Copyright ©2021 Acta Materiae Compositae Sinica. All rights reserved.
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页码：809 / 815
页数：6
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