钢板电磁超声表面波的仿真分析及缺陷定量检测

doi:10.19595/j.cnki.1000-6753.tces.181586

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Abstract The transduction mechanism of electromagnetic acoustic transducer (EMAT) is closely related to the electromagnetic properties of the material being tested. EMAT responds differently to the different electrical and magnetic properties of the test materials. The electromagnetic acoustic transduction mechanism of ferromagnetic materials is complicated because of its magnetostriction effect and nonlinear magnetization characteristic. Based on the constitutive equation of ferromagnetic materials, electromagnetic acoustic transducer finite element model of steel plate with rectangular flaw was established, considering lorentz force, magnetostriction effect and magnetization force simultaneously. The response characteristics of surface waves to steel defects are simulated and analyzed. The relationships between the flaw size, depth and the amplitude of the reflection and transmission waves were obtained, which laid a foundation for quantitative test of steel plate crack defects. Finally, experiments detecting the standard specimen with different depth defects were conducted to vertify the result of simulation analysis.

Key words： Ferromagnetic materials electromagnetic acoustic transducer surface wave quantitative defect detection magnetostrictive force

Received: 26 September 2018 Published: 17 January 2020

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TB552

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	Articles by authors
	Liu Suzhen
	Wang Shujuan
	Zhang Chuang
	Jin Liang
	Yang Qingxin

Cite this article:

Liu Suzhen,Wang Shujuan,Zhang Chuang等. Simulation Analysis of Electromagnetic Acoustic Surface Wave of Steel Plate and Quantitative Defect Detection[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 97-105.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181586 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I1/97

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