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| The excitation characteristics experiment research of electromagnetic acoustic emission on crack of tubular metal parts |
| Zhang Xiaotao, Tang Liwei, Wang Ping |
| First Department, Ordnance Engineering College, Shijiazhuang, 050003 |
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Abstract Aiming at the problems of excitation characteristics of electromagnetic acoustic emission on metal pipe crack, the principle of excitation acoustic emission is analyzed. The peak of excitation current, position of electrode, duration of pulse current and repeatedly applied pulse current are tested in the electromagnetic acoustic emission experiment, then the relation between acoustic emission signal characteristics and the experiment loading conditions. The acoustic emission method of cracks detection must need detection object under loading conditions, but the electromagnetic acoustic emission provides a method for the gun barrel crack detection under normal conditions.
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Received: 01 November 2013
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2014, Vol. 33 
