Research on Simulation and Experiment of the Electromagnetically Induced Acoustic Emission Based on High-Current Loading

Author

Zhang, Chuang ; Liu, Suzhen ; Yang, Qingxin ; Jin, Liang

Author_Institution

Province-Minist. Joint Key Lab. of Electromagn. Field & Electr. Apparatus Reliability, Hebei Univ. of Technol., Tianjin, China

fYear

2012

fDate

19-21 June 2012

Firstpage

1

Lastpage

4

Abstract

Electromagnetically induced acoustic emission (EMAE) technique is a new nondestructive testing (NDT). It did nondestructive detection with the effect of dynamic electromagnetic loading to generate a stress field stimulating stress waves from the defects. The principle and implementation procedure of the EMAE is deeply analyzed in this paper. The finite element model of EMAE has been implemented based on the concrete experiment models. The sample´s deformation has been analyzed with the different loading current and external magnetic field. The experiment of defect detection is achieved. The pulse-current loading unit is designed and applied in the detection experiment of Aluminum crack. It analyses the influence of loading conditions and specimen type on the EMAE signal in detail. At last, it verifies that it could excite the phenomenon of EMAE in the metal plate with the crack by means of time-frequency analysis to the experimental signals.

Keywords

acoustic emission; acoustic signal processing; aluminium; cracks; deformation; finite element analysis; internal stresses; nondestructive testing; plates (structures); structural acoustics; time-frequency analysis; Al; aluminum; crack; deformation; dynamic electromagnetic loading; electromagnetically induced acoustic emission; finite element model; metal plate; nondestructive detection; nondestructive testing; pulse-current loading unit; stress field; stress waves; time-frequency analysis; Acoustic emission; Current density; Electromagnetics; Loading; Metals; Strain;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Problems and Applications (ICEF), 2012 Sixth International Conference on

Conference_Location

Dalian, Liaoning

Print_ISBN

978-1-4673-1333-9

Type

conf

DOI

10.1109/ICEF.2012.6310398

Filename

6310398