工艺与制造英文2021被引 4
织造亚麻纤维和玻璃纤维飞机罩壳真空灌注工艺仿真研究
Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre
Mohd Haris, Khairul Dahri Mohd Aris, Muzafar Zulkifli, Tajul Adli Abdul Razak, Nurul Zuhairah Mahmud Zuhudi · University of Kuala Lumpur
摘要整理
真空灌注工艺在复合材料制件生产中应用前景广阔,特别是在薄壁结构飞机罩壳的制造中。本研究采用 Ansys Fluent 软件进行飞机罩壳模具充填过程优化分析。纤维渗透率作为纤维增强体的物理特性,表征流体通过纤维的能力,与所用树脂粘度密切相关。本工作采用亚麻纤维、玻璃纤维和低粘度环氧树脂,在不使用流动介质的条件下测定亚麻纤维、玻璃纤维及其混杂纤维的渗透率。进行了纤维增强体面内渗透率实验,所有增强纤维具有相同的纤维结构和单位面积质量。通过三维扫描仪和 CATIA 软件建立飞机罩壳顶部分区的数字模型。利用 Ansys Fluent 优化环氧树脂的进胶口和排气口位置。通过平板模型的面内实验充填时间对 Ansys Fluent 仿真模型进行验证。仿真分析结果表明,进胶口应设置在周边,排气口应设置在中心。亚麻纤维和混杂纤维的充填时间约为 10~11 分钟,而玻璃纤维的充填时间约为 2 小时,超过环氧树脂凝胶时间。该方法可用于树脂凝胶时间内的薄壁结构模具充填工艺。
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