Nonlinear Detection and Quantitative Analysis of Electromagnetic Ultrasonic Lamb Wave Mixing for Aluminum with Micro Crack

被引：0
|
作者：
Liu S. [1 ,2 ]
Yang S. [1 ,2 ]
Yuan L. [1 ,2 ]
Zhang C. [1 ,2 ]
Jin L. [1 ,2 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin
[2] Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 17期
关键词：
Comprehensive coefficient factor; Electromagnetic ultrasound; Micro crack; Mixing Lamb wave; Three-dimensional model;
D O I：
10.19595/j.cnki.1000-6753.tces.201235
中图分类号：
学科分类号：
摘要：
The detection of early micro crack is the key to structural failure analysis. In this paper, the method of Lamb waves mixing in electromagnetic ultrasound was used, considering the characteristics of interface respiration of micro crack. Based on the spring model and considering the hysteresis effect and damping force of the micro crack interface, a three-dimensional Lamb wave mixing nonlinear detection model with micro crack was established to simulate the micro crack at the action of mixed ultrasonic. The nonlinear interaction between mixing ultrasonic and micro crack interface was analyzed, and the influence of micro crack length and depth on mixing modulation effect was studied. Finally, an electromagnetic ultrasonic wave mixing nonlinear detection system was built. According to the different sensitivities of difference frequency and sum frequency nonlinear coefficients to the variation on micro crack length, a comprehensive coefficient factor was defined to quantitatively analyze the length of micro cracks. Based on the experimental data, the relationship between the comprehensive coefficient factor and the micro crack length was obtained, and the micro crack length was predicted. The experimental results show that the comprehensive coefficient factor can effectively predict the micro crack length. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
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页码：3639 / 3648
页数：9
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