基于脉冲涡流的多层金属铆接结构孔周裂纹缺陷检测仿真  

Simulation of Crack Defects Testing Around Holes in Multi-layer Metal Riveting Structures Based on Pulsed Eddy Current

作　　者：李雨萱 付跃文[1] 樊俊铃[2] 秦仍川 周瑞琪[1] 贾文博 王海涛 李秋锋[1] LI Yu-xuan;FU Yue-wen;FAN Jun-ling;QIN Reng-chuan;ZHOU Rui-qi;JIA Wen-bo;WANG Hai-tao;LI Qiu-feng(Key Laboratory of Nondestructive Testing(Ministry of Education),Nanchang Hangkong University,330063,China;China Aircraft Strength Research Institute,Xi’an 710065,China;The Second Construction Co.,Ltd.of China Construction First Group,Beijing 100161,China)

机构地区：[1]无损检测技术教育部重点实验室(南昌航空大学),南昌330063 [2]中国飞机强度研究所,西安710065 [3]中建一局集团第二建筑有限公司,北京100161

出　　处：《失效分析与预防》2024年第5期346-352,共7页Failure Analysis and Prevention

基　　金：国家自然科学基金(12364056);中央军委装备发展部“慧眼行动”(BF28883A);江西省科技厅重大专项(20232ABC03A31);南昌航空大学研究生创新专项资金项目(YC2023-053)。

摘　　要：脉冲涡流(PEC)检测技术由于其深层缺陷检测能力和高灵敏度等优点,被应用于多层铆接结构内部缺陷的检测中。为了研究PEC矩形传感器的尺寸参数对多层铆接结构孔周裂纹缺陷检测性能的影响,采用有限元仿真软件COMSOL构建PEC矩形传感器的三维仿真模型,根据PEC在多层铆接结构中的分布规律,通过数值仿真研究探头结构参数以及中心轴偏移量对检测效果的影响。仿真测试结果表明:矩形探头长宽高尺寸比例在1:1.25:1.25时检测灵敏度最高,适宜多层铆接结构的孔周裂纹检测。同时发现,为了保证足够的检测灵敏度,在垂直裂纹缺陷的方向上,偏移量应小于1 mm,在与缺陷平行且重合的方向上,偏移量应小于0.2 mm。该研究结果为多层金属铆接结构孔周裂纹检测传感器尺寸参数设计提供依据。Pulsed eddy current(PEC)testing technology,renowned for its deep defect detection capability and high sensitivity,has been applied in the detection of internal defects in multi-layer riveted structures.To reveal the influence of the size parameters of PEC rectangular sensors on the detection performance of crack defects around holes in these structures,a three-dimensional simulation model of PEC rectangular sensor was constructed using the finite element simulation software COMSOL.Based on the distribution law of PEC in multi-layer riveted structures,the impact of probe structure parameters and central axis offset on the detection effect was studied through numerical simulation.The simulation test results show that the detection sensitivity of the rectangular probe peaks when the ratio of length to width to height is 1:1.25:1.25,which is suitable for detecting cracks around holes in multi-layer riveting structures.Furthermore,it was found that to ensure adequate detection sensitivity,the offset should lower than 1 mm in the direction perpendicular to the crack defect,and less than 0.2 mm in the direction parallel and overlapping with the defect.The findings provide a foundational basis for the design of sensor size parameter aimed at detecting cracks around holes in multi-layer metal riveting structures.

关 键 词：脉冲涡流 多层铆接结构 有限元仿真 孔周裂纹缺陷 

分 类 号：TG115.28[金属学及工艺—物理冶金]