电热载荷对CFRP修理搭接接头剪切性能的影响

玻璃钢/复合材料, 2016, (4): 21-25.

电热载荷对CFRP修理搭接接头剪切性能的影响

朱晨 ^1, , 张俊 ^2, , 路鹏程 ^3, , 王涛 ^4, , 颜金 ^5,

1.中国民航大学,天津市民用航空器适航与维修重点实验室,天津 300300

2.中国民航大学,天津市民用航空器适航与维修重点实验室,天津 300300

3.中国民航大学,天津市民用航空器适航与维修重点实验室,天津 300300

4.广州飞机维修工程有限公司,广州,510470

5.广州飞机维修工程有限公司,广州,510470

基金项目: 中央高校基本科研业务费(3122013Z009) 国家自然科学基金项目(61471364)

关键词： CFRP修理 , 单层搭接 , 电热载荷 , 剪切强度

THE EFFECTS OF ELECTRIC-THERMAL LOAD ON THE SHEAR PROPERTY OF THE CFRP SINGLE-LAP JOINT AFTER REPAIR

Keywords： CFRP repair , single-lap joint , electric-thermal load , shear strength

采用单层预浸料搭接简化构型,研究电热载荷对复合材料层板挖补修理搭接接头层间剪切性能的影响.通过自制的复合材料电热测试平台,测试了不同电流制度下,随搭接长度不同试样接头处温度分布.研究了不同电流强度下搭接接头温度变化规律,初步揭示了搭接接头长度-温度-电阻之间的关系,并对不同电流载荷下挖补搭接接头的层间剪切性能进行研究.研究结果表明,通电过程中,搭接区域温度升高较快,非搭接区域温度无明显变化.低电流时,电热促使接头树脂进一步固化,适当提高了接头搭接界面的粘接性能,其剪切强度略有上升;当通电电流过大时,接头温度急剧上升,对搭接区域产生过热损伤,降低了接头的剪切强度.

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