真空压力下树脂沿织物铺层厚度渗透速率

为了考察树脂膜熔渗(RFI)工艺过程中树脂在高温条件下沿织物铺层厚度方向的不饱和渗透特性, 应用自行设计的测试系统, 考察了液体沿织物铺层厚度方向流动前锋的影响因素, 测试并分析了液体沿玻璃纤维铺层厚度方向渗透速率的主要影响因素及其变化规律。结果表明, 液体沿纤维织物厚度方向流动为宏观上的一维流动。 真空压力增大、 树脂温度升高、 纤维体积分数减小, 均可使液体的渗透速率加快。另外, 对比发现, 70℃ E-51 环氧树脂沿玻璃纤维铺层厚度方向的渗透特性与室温下硅油的渗透特性基本相当。 

Impregnation velocity of resin along the thickness of fiber stacks under vacuum pressure

In order to investigate the unsaturated impregnation property of resin along the thickness of fiber stacks at high temperature during the process of resin film infusion(RFI), the influence factors of the flow front of resin were studied, and the effects of the primary factors on the impregnation velocity of liquids along the thickness of glass fiber weaves and the rules were tested and analyzed by using the self-designed equipment. The results indicate that the resin infusion along the thickness of fiber stacks is one-dimensional flow, and the impregnation velocity of liquids can be increased by increasing the vacuum pressure, raising the temperature of resin and reducing the volume fraction of fibers. In addition, the impregnation behaviors of E-51 epoxy resin at 70 ℃ and silicone oil at room temperature along the thickness of glass fiber plies are almost homological.