Radiation pattern of lamb waves generated by electromagnetic acoustic transducers

Author

Bo Liu ; Chao-ran Deng ; Chuan-liu Jiang ; Guo-fu Zhai ; Lei Kang

Author_Institution

Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China

fYear

2014

fDate

20-23 June 2014

Firstpage

102

Lastpage

106

Abstract

Radiation pattern is an important characteristic of Lamb waves when applied to nondestructive testing and evaluation. However, this character cannot be analyzed by 2-D analytical or numerical models. In this paper, a 3-D finite element (FE) model is presented and frequency domain analysis is used to study the acoustic field of Lamb waves generated by electromagnetic acoustic transducers (EMATs). Based on the FE model, the divergence angle of S0 Lamb wave is calculated to be 6.6°. Experiments are carried out to measure the in-plane displacements of Lamb waves and experiment results agree well with the simulation results.

Keywords

acoustic transducers; finite element analysis; surface acoustic waves; ultrasonic materials testing; 3-D finite element model; Lamb waves; acoustic field; electromagnetic acoustic transducers; frequency domain analysis; in-plane displacements; radiation pattern; Acoustics; Aluminum; Coils; Eddy currents; Lorentz covariance; Magnetic fields; Vibrations; EMATs; Lamb wave; finite element model; radiation pattern;

fLanguage

English

Publisher

ieee

Conference_Titel

Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on

Conference_Location

Chengdu

Print_ISBN

978-1-4799-4731-7

Type

conf

DOI

10.1109/FENDT.2014.6928242

Filename

6928242