闪电防护铜网在航空复材制件VARI成型工艺中的树脂导流应用

复合材料在民机结构中的大量应用对航空复材制件的闪电防护提出了新的要求,与此同时,以VARI工艺为代表的复材液体成型技术愈发受到关注,常用导流网在VARI工艺中造成浪费也易引起质量问题,结合这两方面的需求,提出将闪电防护铜网用作导流介质,在表面应用类的航空复材制件的VARI成型工艺中,将铜网的闪电防护作用和树脂导流作用进行集成,并对闪电防护铜网在VARI工艺中的树脂导流作用进行了试验分析,研究了引入铜网导流后VARI制件的注胶情况、铜网层数对树脂渗透率的影响,以及制件最终成型效果和表面质量。本研究对于丰富复材VARI成型工艺技术手段,提升VARI工艺的综合经济性,进一步拓展VARI工艺在民机复材结构中的应用都具有积极意义。

Resin Flow Guiding Application of Lightning-Strike-Protection Copper Mesh in the VARI Process for Aviation Composite Parts

With the widespread application of composite materials in aircraft structure,new demands on the lightning-strike-protection for aviation composite parts have been raised.Meanwhile,represented by VARI process,the liquid composite molding technology has caused more and more research attention.But the commonly used flow mesh will cause material waste and quality problems.Combined with the two demands above,this article introduced the lightning-strikeprotection copper mesh as flow media in the VARI manufacture process for aircraft composite parts in the surface application.We integrated the resin flow guide and lightning-strike-protection functions of copper mesh and investigated its influence on the resin flow,the relationship between the copper mesh layers and the resin permeability and the surface quality of the cured composite parts.Our research has positive significance for enriching the technical means of VARI process,improving the economical efficiency and the development of the application of VARI technology in aircraft structure.