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电阻法诊断碳布/环氧树脂复合材料压缩损伤
引用本文:谢小林,洪珍,李志鹏,权红英,范红青.电阻法诊断碳布/环氧树脂复合材料压缩损伤[J].航空材料学报,2012,32(3):96-100.
作者姓名:谢小林  洪珍  李志鹏  权红英  范红青
作者单位:南昌航空大学无损检测技术教育部重点实验室,南昌,330063
基金项目:教育部无损检测技术重点实验室开放基金,江西省教育厅科研项目
摘    要:采用电阻法与声发射技术研究了压缩载荷对不同规格的碳布/环氧树脂复合材料的影响,得出电阻法诊断复合材料压缩损伤的依据。试验结果表明,当受到压缩载荷作用时,碳布/环氧树脂复合材料中的导电网络会发生变化,从而引起复合材料电阻的变化。同时,复合材料的声发射能量会增加。当电阻变化幅度超过一定值时,则可诊断复合材料中存在压缩损伤。电阻法诊断复合材料压缩损伤能够提高复合材料的使用安全性能。

关 键 词:碳布/环氧树脂复合材料  压缩损伤  电阻变化  声发射能量

Diagnosing Compress Damage in Carbon Fabric/Epoxy-Matrix Composites by Electrical Resistance Measurement
XIE Xiao-lin , HONG Zhen , LI Zhi-peng , QUAN Hong-ying , FAN Hong-qing.Diagnosing Compress Damage in Carbon Fabric/Epoxy-Matrix Composites by Electrical Resistance Measurement[J].Journal of Aeronautical Materials,2012,32(3):96-100.
Authors:XIE Xiao-lin  HONG Zhen  LI Zhi-peng  QUAN Hong-ying  FAN Hong-qing
Institution:(Key Laboratory of Nondestructive Testing(Nanchang Hangkong University),Ministry of Education,Nanchang 330063,China)
Abstract:The influence of compress load on different specification carbon fabric/epoxy-matrix composites was studied by electrical resistance measurement and acoustic emission technology,compress damage in composites was diagnosed by electrical resistance measurement.The experiment results showed that when carbon fabric/epoxy-matrix composites were compressed,the conductive network in composites changed,so,electrical resistance of composites changed too.At the same time,acoustic emission energy of composites increased.When the change extent of electrical resistance of composites exceeded a certain value,compress damage in composites can be diagnosed.The safety of composites in use can be improved in this case.
Keywords:carbon fabric/epoxy-matrix composites  compress damage  electrical resistance change  acoustic emission energy
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