电磁声发射检测技术的涡流激励方法

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Abstract The paper demonstrates the feasibility of acoustic emission(AE) induced by eddy current through analyzing the change of deformation at the tip of defect with the exciting current through the finite element method (FEM) of electromagnetically induced acoustic emission (EMAE). In addition, the deformation nature of defect is determined by the fracture mechanics. The experiment of EMAE is carried out. Acoustic emission signals of the defect are received and the crack is located by AE signals. The established feature of AE signals proves that FEM is correct, which provides a firm theoretical and experimental foundation to the direct calculation and analysis of amplitude and frequency feature of EMAE.

Key words： Electromagnetically induced acoustic emission Lorentz force metal plate crack detection eddy current exciting

Received: 30 August 2011 Published: 20 March 2014

PACS:

TM930.12

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	Liu Suzhen
	Jin Liang
	Zhang Chuang
	Yang Qingxin

Cite this article:

Liu Suzhen,Jin Liang,Zhang Chuang等. Eddy Current Exciting Method for Electromagnetically Induced Acoustic Emission Detecting Technique[J]. Transactions of China Electrotechnical Society, 2012, 27(7): 153-159.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I7/153

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