Quantitative evaluation of an internal flaw of a structural component using electromagnetic acoustic transducers

Shinichi Maruyama, Toshihiko Sugiura, Akihiro Inoue, Masatsugu Yoshizawa

Research output: Contribution to conferencePaper

Abstract

Electromagnetic acoustic transducers (EMATs) can transmit and detect ultrasonic waves in a conductive specimen out of any contact with it. This process can be given theoretical modeling and formulation based on elastodynamics and electromagnetics. It suggests a possibility of quantitative nondestructive evaluation using EMATs. This research deals with a numerical method of flaw identification from a receiver signal obtained by EMATs. Experimental results of the receiver signals agree well with numerical ones, which verified the mathematical model of the inspection process. Flaw identification is formulated as a problem of parameter optimization. To avoid being trapped in a local optimum, initial parameters were successfully evaluated from the height and the time period of peaks in the receiver signals. Flaw parameters were identified from the receiver signals obtained by numerical simulations and experiments, which verified the method of flaw identification presented here.

Original languageEnglish
Pages21-28
Number of pages8
Publication statusPublished - 2001 Dec 1
Event2001 ASME International Mechanical Engineering Congress and Exposition - New York, NY, United States
Duration: 2001 Nov 112001 Nov 16

Other

Other2001 ASME International Mechanical Engineering Congress and Exposition
CountryUnited States
CityNew York, NY
Period01/11/1101/11/16

ASJC Scopus subject areas

  • Mechanical Engineering

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    Maruyama, S., Sugiura, T., Inoue, A., & Yoshizawa, M. (2001). Quantitative evaluation of an internal flaw of a structural component using electromagnetic acoustic transducers. 21-28. Paper presented at 2001 ASME International Mechanical Engineering Congress and Exposition, New York, NY, United States.