结构化增韧层增韧RTM复合材料性能

张朋; 刘刚; 胡晓兰; 包建文; 益小苏

结构化增韧层增韧RTM复合材料性能

1.
北京航空材料研究院先进复合材料重点实验室, 北京 100095;
2.
厦门大学材料学院, 厦门 361005

基金项目: 国家973课题(2010CB631101); 国家自然科学基金(51103121); 航空基金(20115221003)

详细信息

通讯作者:
刘刚,博士,高级工程师,主要从事树脂基复合材料相关研究E-mail:liugangphd@gmail.com

中图分类号: TB332
计量
- 文章访问数: 1613
- HTML全文浏览量: 109
- PDF下载量: 1351
出版历程
- 收稿日期: 2011-06-30
- 修回日期: 2011-11-15
- 刊出日期: 2012-08-14

Properties of toughened RTM composites by structural toughening layer

1.
Science and Technology on Advanced Composites Laboratory, Beijing Institute of Aeronautics Materials, Beijing 100095, China;
2.
College of Materials, Xiamen University, Xiamen 361005, China

摘要

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212 MPa提高到281 MPa。
- RTM /
- 无纺布 /
- 复合材料 /
- 层间增韧 /
- 层间性能
Abstract: 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 (G_{Ⅰ C}) and mode Ⅱ fracture toughness (G_{Ⅱ 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.
- RTM /
- nonwoven fabric /
- composites /
- interlaminar toughen /
- interlaminar properties