电阻法诊断碳布/环氧树脂复合材料压缩损伤  

Diagnosing Compress Damage in Carbon Fabric/Epoxy-Matrix Composites by Electrical Resistance Measurement

作　　者：谢小林[1] 洪珍[1] 李志鹏[1] 权红英[1] 范红青[1] 

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063

出　　处：《航空材料学报》2012年第3期96-100,共5页Journal of Aeronautical Materials

基　　金：教育部无损检测技术重点实验室开放基金(ZD200829001);江西省教育厅科研项目(GJJ10531)

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。The influence of compress load on different specification carbon fabric/epoxy-matrix composites was studied by electrical re- sistance measurement and acoustic emission technology, compress damage in composites was diagnosed by electrical resistance meas- urement. 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 in- creased. 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.

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 

分 类 号：TB332[一般工业技术—材料科学与工程]