工艺因素对RFI复合材料渗透成型影响的试验研究

采用模拟试验的方法研究了复合材料树脂膜渗透成型(Resin Film Infusion RFI)过程中树脂粘度及压力对渗透高度及浸渍质量的影响。实验结果表明,总体上树脂的粘度提高,复合材料的渗透浸渍高度下降。成型压力则对不同粘度体系及增强材料预处理情况有不同的结果,一方面提高树脂渗透驱动力,另一方面压实纤维床从而降低渗透率。但压力的提高总是有利于提高渗透浸渍质量,减少孔隙率。分析认为压力影响渗透高度的实质是渗透压力变化及纤维床的压实两种因素的共同作用结果。

Investigation on Effects of Processing Parameters on Infiltration of Composite RFI

In this paper experimental processes are carried on to investigate the effects of resin viscosity and pressure on infiltrated heights and qualities of RFI composites.The results show that totally a higher viscosity will decrease the height of infiltration.Depending upon the resins of various viscosities and pretreatment of fabrics,the pressure leads two different effects on driving pressure of resin infusion and the compaction of fiber bed to decrease its permeability.Higher pressure always improves the quality of infiltration and lower void content.Analysis also shows that actually the influence of pressure on infiltration height is the results of cooperation of infiltrate pressure and compaction of fiber bed.