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, Vol. 0 ›› Issue (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¹,路鹏程¹,王涛²

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.广州飞机维修工程有限公司,广州510470

收稿日期:2015-11-10 出版日期:2016-04-28 发布日期:2016-04-28
作者简介:朱晨(1957-),男,硕士,教授,主要从事复合材料结构修理研究,czhu@cauc.edu.cn。
基金资助:
国家自然科学基金项目(61471364);中央高校基本科研业务费(3122013Z009)

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

ZHU Chen¹, ZHANG Jun¹, LU Peng-cheng¹, WANG Tao²

1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China, Tianjin 300300, China;
2.Guangzhou Aircraft Maintenance Engineering Co., Ltd., Guangzhou 510470, China

Received:2015-11-10 Online:2016-04-28 Published:2016-04-28

摘要/Abstract

摘要： 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。

关键词: CFRP修理, 单层搭接, 电热载荷, 剪切强度

Abstract: Carbon fiber resin matrix composite material is widely applied in the field of aviation. It has become the norm of the aircraft structural repair. The electric-thermal load was studied in the paper and was performed on the CFRP single-lap joint after wet lay up repair. The surface temperature field of single-lap joint and the resistance of sample were measured by the self-devised damage test device. The change rules of temperature and resistance under different current applications have been investigated. The scanning electron microscope was used to analyze the changes of surface morphology after shear failure. It demonstrated that shear strength slight increases under low electric current since post curing of resin. Higher current application has a detrimental effect on the properties of the joint. Shear strength decreases under higher electric currents since high temperature can induce interfacial damage of joint.

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

中图分类号:

TB332

朱晨,张俊,路鹏程,王涛. 电热载荷对CFRP修理搭接接头剪切性能的影响[J]. 玻璃钢/复合材料, 2016, 0(4): 21-25.

ZHU Chen, ZHANG Jun, LU Peng-cheng, WANG Tao. THE EFFECTS OF ELECTRIC-THERMAL LOAD ON THE SHEAR PROPERTYOF THE CFRP SINGLE-LAP JOINT AFTER REPAIR[J]. Fiber Reinforced Plastics/Composites, 2016, 0(4): 21-25.

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