Numerical simulation of magnetostrictive Lamb wave EMATs on steel plate

Author

Ri-liang Su ; Shu-juan Wang ; Guo-fu Zhai

Author_Institution

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

fYear

2014

fDate

20-23 June 2014

Firstpage

107

Lastpage

111

Abstract

Lamb wave has been widely used for large structure inspection. Generally, piezoelectric transducers or electromagnetic acoustic transducers (EMATs) can be used to generate Lamb wave. The driving mechanism of EMATs includes Lorentz force, magnetization force and magnetostriction. A finite element model for magnetostrictive Lamb wave EMATs has been presented including the three mechanisms. The simulation result shows that magnetostriction is the main transduction mechanism under the horizontal magnetic field. The magnetic field dependence of EMATs has been evaluated by simulation and experiment on a 3mm thick low carbon steel plate.

Keywords

finite element analysis; magnetostriction; plates (structures); steel; surface acoustic waves; ultrasonic materials testing; ultrasonic transducers; Lorentz force; electromagnetic acoustic transducers; finite element model; horizontal magnetic field; large structure inspection; low carbon steel plate; magnetic field dependence; magnetization force; magnetostrictive Lamb wave EMATs; numerical simulation; piezoelectric transducers; size 3 mm; transduction mechanism; Force; Magnetic fields; Magnetic flux; Magnetic hysteresis; Magnetostriction; Steel; EMATs; finite element method; magnetostrictive Lamb wave;

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.2014.6928243

Filename

6928243