航空多层铆接结构内层裂纹的远场涡流检测  

The far-field eddy current detection of inner layer crack of aviation multilayer riveted structures

作　　者：李小丽 陈新波 王正 王泽帅 宋凯[4] LI Xiaoli;CHEN Xinbo;WANG Zheng;WANG Zeshuai;SONG Kai(Aviation Mechanical Engineering and Command Department,Qingdao Branch of Naval Aeronautical University,Qingdao,266041,China;College of Information Science and Engineering,Ocean University of China,Qingdao,266100,China;92329 Unit of PLA,Huludao,125100,China;Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]海军航空大学青岛校区航空机械工程与指挥系,青岛266041 [2]中国海洋大学信息科学与工程学部,青岛266100 [3]92329部队,葫芦岛125100 [4]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：《无损检测》2024年第3期44-48,共5页Nondestructive Testing

摘　　要：多层铆接结构是飞机机身蒙皮与型材的主要结构。由于周期性载荷作用,其内部型材等承力部位易产生疲劳裂纹,该位置隐蔽性强,采用目视或常规无损检测技术难以检测出这些缺陷。而远场涡流检测技术可检测埋藏深度大的缺陷,采用该技术对飞机多层铆接结构的内层裂纹进行检测。结果表明:选择合适的检测频率时,检测信号阻抗的幅值与裂纹深度、检测信号阻抗的相位角与裂纹埋藏深度均呈良好的线性关系,对于确定的被检材料和检测传感器,得出的拟合公式可为裂纹损伤的定位、定量检测提供理论参考依据,从而获得裂纹的准确信息,实现裂纹损伤的准确定位和定量检测。The multilayer riveted structure is the main structure of aircraft fuselage skin and profiles.Due to periodic loading,fatigue cracks are prone to occur in load-bearing parts such as internal profiles,which are highly concealed and difficult to detect using visual and conventional nondestructive testing techniques.The far-field eddy current detection technology can detect defects with a large burial depth,so it was applied to the inner layer crack detection of aircraft multilayer riveted structures.The results indicated that the amplitude of the detection signal impedance had a good linear relationship with the crack depth,and the phase angle of the detection signal impedance had a good linear relationship with the crack burial depth by selecting an appropriate detection frequency.For the determined tested material and detection sensor,the fitting formula obtained can provide a theoretical reference for the localization and quantitative detection of crack damage,thus obtaining accurate information of cracks and achieving accurate localization and quantitative detection of crack damage.

关 键 词：多层结构 内层裂纹 远场涡流检测 阻抗幅值 阻抗相位角 

分 类 号：TG115.28[金属学及工艺—物理冶金]