Title :
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
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;
Conference_Titel :
Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-4731-7
DOI :
10.1109/FENDT.2014.6928243
