摘要
从复合材料离位增韧思想出发,选用具有高孔隙率的尼龙无纺布(PNF)作为结构化增韧层,采用RTM工艺制备了PNF层间增韧改性的U3160碳纤维增强环氧3266树脂基复合材料(U3160-PNF/3266),并研究了其韧性相关性能和增韧机制。结果表明:U3160-PNF/3266复合材料层间仍保持其原有的结构形式,同时与层间树脂相互贯穿形成了一种非反应诱导相分离的双连续结构,并且这种双连续结构表现出显著的增韧效果。U3160-PNF/3266复合材料的Ⅰ型层间断裂韧性和Ⅱ型层间断裂韧性分别提高了1.1倍和1.4倍,冲击后压缩强度由212MPa提高到281MPa。
Based on ex-situ toughening concept,the polyamide nonwoven fabric（PNF） with high porosity was chosen as structural toughening layer,and the U3160 carbon fiber reinforced epoxy 3266 composites toughened by interlaminar PNF（U3160-PNF/3266） was fabricated via RTM process.The properties of U3160-PNF/3266 composite were investigated as well as toughening mechanism.The results indicate that the PNF still keep original structure in composites interlaminar,and formed a unreactional co-continuous structure with based resin which show remarkable toughening effect.Mode Ⅰ fracture toughness（GⅠ C） and mode Ⅱ fracture toughness（GⅡ C） of the U3160-PNF/3266 composites are 1.1 times and 1.4 times higher respectively than that of the control system,and the compression after impact（CAI） increase from 212 MPa to 281 MPa.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2012年第4期1-9,共9页
Acta Materiae Compositae Sinica
基金
国家973课题(2010CB631101)
国家自然科学基金(51103121)
航空基金(20115221003)
关键词
RTM
无纺布
复合材料
层间增韧
层间性能
RTM； nonwoven fabric； composites； interlaminar toughen； interlaminar properties；
