电热载荷对CFRP复合材料冲击后压缩性能研究

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (6): 48-52.

电热载荷对CFRP复合材料冲击后压缩性能研究

纪朝辉^*, 刘刚, 王志平, 李娜

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

收稿日期:2014-12-24 出版日期:2015-06-28 发布日期:2021-09-13
作者简介:纪朝辉(1963-),男,硕士,教授,主要从事复合材料/金属材料表面改性研究。
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);中央高校基本科研业务费(ZXH2012J002)

THE EFFECTS OF ELECTRIC ON THE IMPACT DAMAGE CHARACTERISTICS AND RESIDUAL COMPRESSIVE STRENGTH OF ELECTRIFIED CFRP COMPOSITES

JI Zhao-hui, LIU Gang, WANG Zhi-ping, LI Na

Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China

Received:2014-12-24 Online:2015-06-28 Published:2021-09-13

摘要/Abstract

摘要： 采用实验室电热载荷试验环境与测试平台,测试了CFRP复合材料在多种电流制度下试样的表面温度分布,并获得了CFRP复合材料电阻在不同电流强度下的变化规律,初步揭示了CFRP复合材料的电阻与电流强度之间呈线性递减的关系;对五种不同电流处理的CFRP复合材料进行了冲击后的剩余压缩强度试验(CAI)测试,试验后采用超声C扫描检测、外观检查与断口侧面宏观观察方法对损伤与失效特征进行了对比分析。研究结果表明,CFRP复合材料的剩余压缩强度随通入电流强度的大小呈先保持不变后下降的趋势,当电流超过20A时,试样表面冲击凹坑深度和冲击损伤面积增长较快,分层损伤与纤维断裂现象越来越严重。

关键词: 复合材料层合板, 电热损伤, 冲击损伤, 剩余压缩强度

Abstract: The electric-thermal damages were studied in the paper and are performed on carbon fiber reinforced polymer (CFRP), the surface temperature field of electrified CFRP specimens was measured by the self-devised damage test device. The resistance variation with current magnitude was measured for the CFRP composites. When comparing the initial resistances at the onset of the electric current applications for the same specimen subjected to the currents of different magnitudes, it was found that resistance decreased with an increase in the current magnitude. We have also investigated experimentally the influence of the current application on the impact response of CFRP. The relationship between damage area, compressive strength after impact (CAI) and current magnitude was discussed. The major damage mechanism of electrified composites under compressive load was also analyzed. It was demonstrated that the current density plays an important role in the impact damage resistance of electrified composites: in contrast to a low current application that has almost no effect on the CAI of the tested composite, a stronger application of an electric current apparently had a detrimental effect on the composites. The dent depth and impact area increases rapidly with the increasing of current after 20A.

Key words: CFRP, electric-thermal-damage, impact damage, residual compressive strength

中图分类号:

TB332

纪朝辉, 刘刚, 王志平, 李娜. 电热载荷对CFRP复合材料冲击后压缩性能研究[J]. 复合材料科学与工程, 2015, 0(6): 48-52.

JI Zhao-hui, LIU Gang, WANG Zhi-ping, LI Na. THE EFFECTS OF ELECTRIC ON THE IMPACT DAMAGE CHARACTERISTICS AND RESIDUAL COMPRESSIVE STRENGTH OF ELECTRIFIED CFRP COMPOSITES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(6): 48-52.

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