摘要
在工作环境恶劣的铝合金板表面,容易由微细裂纹和疲劳损伤引起脆性断裂或者疲劳断裂,进而引发灾难性事故。提出融合电磁声发射(EMAE)和电磁超声(EMAT)的复合无损检测方法,该复合方法在不需要增加额外激励电路和线圈的条件下可对表面与近表面的微细裂纹进行检测,弥补了在关键部位单一检测不充分、不可靠。设计了复合检测激励线圈,并利用有限元方法进行了仿真。仿真的结果表明线圈可以满足预期要求。
The brittle and fatigue fracture caused by micro-crack and fatigue damage often happen suddenly in the aluminum alloy plate surface, and even results in a catastrophic accident. A composite nondestructive testing （NDT） method is presented which integrates electromagnetically induced acoustic emission （EMAE） with electromagnetic acoustic transducer （EMAT）. The surface and sub-surface defects can be detected by this nondestructive method without adding the special exciting circuits and coils. This method makes up for the inadequate and unreliable detection in the key position by a single detection. The exciting coil of the composite nondestructive testing method is designed which suits to EMAE and EMAT. The finite element method （FEM） is used for the simulation. The simulation results show that the proposed coil model is valid for application.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第6期28-33,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51077036
51207105)
河北省自然科学基金(E2012202026
E2012202048)资助项目
关键词
电磁声发射
电磁超声
复合激励线圈
无损检测
Electromagnetically induced acoustic emission
electromagnetic acoustic transducer
composite exciting coil
nondestructive testing
作者简介
蔡智超男，1989年生，博士研究生，主要从事电磁无损检测技术方面的研究工作。
刘素贞（通讯作者）女，1969年生，博士教授，主要从事工程电磁场与磁技术方面的研究工作
