摘要
针对碳纤维/环氧树脂体系,设计了在碳纤维单丝复合体系加载弱电流的方法,并通过单丝断裂实验,研究了弱电流对两种碳纤维/环氧树脂界面黏结性能的影响。结果表明：在0.60-0.67mA直流电加载一定时间后,T300B和T700SC碳纤维体系的界面黏结强度均下降,界面载荷传递效率降低,随着电流加载时间的延长,降低程度变化不明显;T300B碳纤维体系界面性能对弱电流的敏感性更高,可能与两种碳纤维的表面特性不同有关;通过对不同固化度试样加载弱电流后的界面性能进行分析,认为碳纤维/环氧树脂界面性能受弱电流影响的机理与界面区应力状态改变以及导电产生的焦耳热效应有关。
The method of low current loading on single carbon fiber composite system was designed for carbon fiber/epoxy resin. By means of single fiber fragmentation test, the effects of low current on in- terfacial bonding properties of two kinds of carbon fiber/epoxy resin systems were investigated. The results show that the interfacial bonding strength and interfacial load transfer efficiency of T300B and T700SC carbon fiber systems decrease after loading with 0. 60-0. 67mA direct current. The decreasing degrees do not change obviously with current-loading time. The interracial bonding property of the T300B carbon fiber system shows higher sensitivity to low current. This may be attributed to differ- ent surface characteristics of the two carbon fibers. By changing the curing degree of the matrix, the interfacial bonding strength of samples after low current loading was analyzed, and the mechanism of carbon fiber/epoxy resin interfacial property affected by low current is related to change of stress state at interfacial region and the joule heating effect generated by current.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2016年第5期79-85,共7页
Journal of Materials Engineering
基金
中央高校基本科研业务费专项资金(YWF-14-CLXY-001)
关键词
碳纤维
环氧树脂
单丝断裂
界面性能
弱电流
carbon fiber
epoxy resin
single fiber fragmentation
interracial property
low current
作者简介
通讯作者：顾轶卓（1979-），男，博士，副教授，主要从事树脂基复合材料方面的研究工作，联系地址：北京市海淀区学院路37号北京航空航天大学材料科学与工程学院（100191），E—mail：benniegu@163．COm
