摘要
针对高速列车、新能源汽车等交通工具对高性能泡沫夹层复合材料的迫切需求,制备了玻璃纤维三维立体织物增强环氧树脂泡沫复合材料(下称GF-Fabric/EP复合材料)及其夹层结构,并重点探索短切碳纤维(Short carbon fiber,SCF)对其泡沫本身及夹层复合材料的增强作用。研究结果表明,SCF的填充通过受载时阻断环氧树脂泡沫内部裂纹的扩展,利用自身断裂及与基体脱粘等消耗能量,显著提升环氧树脂泡沫的力学性能,并可与玻璃纤维三维立体织物实现协同增强效果,在填充质量比为2%时复合材料力学性能最佳。同时,基于纤维的“桥联”作用,SCF的引入亦可有效改善铝合金面板与芯材的界面性能。
In response to the urgent demand for high-performance foam sandwich composite materials for high-speed trains,new energy vehicles and other vehicles,a three-dimensional glass fabric reinforced epoxy foam composite material(GFFabric/EP)and a sandwich structure were prepared.The reinforcement effect of short carbon fiber(SCF)on the foam and sandwich composite was mainly explored.The results showed that the filling of SCF could significantly improve the mechanical properties of epoxy resin foam by blocking the expansion of cracks inside the epoxy resin foam under load,and by consuming energy in the case of SCF breakage and debonding from the matrix.The composite achieved a synergistic reinforcement by SCF and GF-Fabrics.The best mechanical properties of the composite were obtained when the SCF filling mass ratio was 2%.Besides,based on the effect of fiber bridging,the introduction of SCF also effectively improved the interface performance between the aluminum alloy skins and the core material.
作者
李华冠
李赵璇
章月
项俊贤
匡宁
丁颖
Li Huaguan;Li Zhaoxuan;Zhang Yue;Xiang Junxian;Kuang Ning;Ding Ying(School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167;College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;Nanjing Fiberglass Research&Design Institute Co.,Ltd.,Nanjing 210012)
出处
《玻璃纤维》
CAS
2023年第1期11-18,共8页
Fiber Glass
基金
项目名称:江苏省高等学校大学生创新创业训练计划项目:连续纤维增强蜂窝复合材料设计制造与性能评价研究项目编号:202111276002Z。
关键词
短切碳纤维
环氧泡沫夹层复合材料
力学性能
失效机制
short carbon fiber
epoxy foam sandwich composite
mechanical properties
failure mechanism
