Transactions of China Electrotechnical Society  2019, Vol. 34 Issue (19): 3961-3967    DOI: 10.19595/j.cnki.1000-6753.tces.181013
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Electromagnetic Ultrasonic Nonlinear Detection of Aluminum with Plastic Damage Based on Cumulative Effect
Zhang Chuang1,2, Cao Xiaolin1,2, Liu Suzhen1,2, Jin Liang3, Yang Qingxin1,2
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;
2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province School of Electrical Engineering Hebei University of Technology Tianjin 300130 China;
3. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China

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Abstract  In view of the hot issue, detection of early micro-damage of materials, this paper was based on the wave equation of guided wave propagation in solids and the nonlinear theory of solid mechanics. The finite element analysis of electromagnetic nonlinearity was made based on Murnaghan model. The plastic damage in different degrees was simulated. By observing the changes of the fundamental and second harmonic amplitudes, the cumulative effects of second harmonic was studied; In the experimental aspect, the detection of the intact specimen and damaged specimen was performed. By studying the fundamental and second harmonic amplitude, and the second-order relative nonlinear coefficient, it is verified that the second harmonic generated in the propagation process can be accumulated with the propagation distance, and the second-order relative non-linear coefficient has a good linear relationship with the propagation distance. This method can be used to realize the quantitative detection of the length of the plastic damage region.
Key wordsPlastic damage      ultrasonic nonlinearity      second harmonic      cumulative effect     
Received: 11 June 2018      Published: 12 October 2019
PACS: TM15  
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Zhang Chuang
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Yang Qingxin
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Zhang Chuang,Cao Xiaolin,Liu Suzhen等. Electromagnetic Ultrasonic Nonlinear Detection of Aluminum with Plastic Damage Based on Cumulative Effect[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 3961-3967.
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