非对称复杂泡沫夹芯复合材料VARI成型工艺设计与验证

DESIGN AND VERIFICATION OF VARI PROCESS FOR ASYMMETRIC COMPLEX FOAM SANDWICH COMPOSITES

针对一种民用飞机整流罩结构件,采用PAM-RTM辅助进行了非对称泡沫夹层复合材料结构的真空辅助液体成型工艺流道设计与优化,通过对比分析不同的流道设计方案,获取了非对称带开口的复杂泡沫夹层复合材料结构液体成型注胶过程中树脂的流动规律,形成了优选注胶方案,并进行了实际工艺验证。最后,对试验件成型质量进行了检测,无损检测结果表明试验件成型质量良好,没有超标缺陷。研究结果可为复杂泡沫夹层结构液体成型技术在民机结构上的应用奠定技术基础。

Aiming to solve the manufacture problems of civil aircraft aft fairing structure using vacuum assisted resin infusion (VARI) process, PAM-RTM simulation was adopted to assist the designing and optimization of resin flow during the resin infusion process for asymmetric foam sandwich composite structures. Firstly, the simulation process of resin flow was established based on PAM-RTM software, and four different resin injection schemes were proposed and conducted. Through comparison and analysis of the four different simulation schemes, the resin flow rules during injection process for the complex foam sandwich composite material with opening area have been obtained. Then, the optimum injection scheme was selected and verified by experiment. Finally, the quality of the fabricated foam sandwich composite was tested, and the non-destructive testing results demonstrated the good quality without defects, as well as good uniformity in thickness. The research results might be useful for the application of complex foam sandwich composites manufactured by liquid forming technology in civil aircraft structures.