聚酰亚胺纤维/碳纤维增强树脂基混杂复合材料低速冲击性能

Low-velocity Impact Properties of Polyimide/Carbon Fiber Reinforced Resin Matrix Hybrid Composites

通过模压法制备了六种不同形式的聚酰亚胺纤维(PIF)/碳纤维(CF)混杂纤维复合材料,选用20J的冲击能量,对六种样品进行落锤冲击,并对损伤的试样进行C扫描观察其失效机制,研究混杂比和铺层顺序对PIF/CF混杂增强树脂基复合材料抗冲击性能的影响。结果表明:将PIF加入CF复合材料中是能够改善材料的抗冲击性能,当PIF与CF比例为1:3时吸能效果最好,能量吸收率达87.5%;而同种混杂比(1:3)下,当PIF处于冲击面时,材料更具有韧性其吸收的能量高于CF为冲击面的吸收的能量,冲击损伤更加集中面积更小,材料的抗冲击性能更好,其中4层PIF位于CF表面时能量吸收率高达93%,且损伤面积为6.36%。

Six different forms of polyimide(PIF)/carbon fiber(CF)hybrid composites were prepared by molding method.The impact tests were carried out for the samples by a drop weight impact test machine under the conditions of 20J impact energy.The damaged samples were scanned by C-scans to observe their failure mechanisms,and the effects of hybrid ratio and stacking sequence on the impact resistance of PIF/CF hybrid reinforced resin matrix composites were studied.The results showed that addition of polyimide fibers into carbon fiber composites could improve the impact resistance of the materials.When the ratio of polyimide fiber to carbon fiber was 1:3,the energy absorption effect was best and energy absorption rate was up to 87.5%.And under the same hybrid ratio(1:3),when the polyimide fiber was acting as the impact surface,the material was tougher and the absorbed energy was higher than that of the carbon fiber as the impact surface.The impact damage was more concentrated and the area was smaller,and the impact resistance of the material was better.When the 4 layers of PIF were on the CF surface,the energy absorption rate was as high as 93%and the damage area was 6.36%.