Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers

The multimode and dispersion characteristics of Lamb waves make them difficult to apply to nondestructive evaluation. This paper presents a paired configuration of a meander-line coil electromagnetic acoustic transducer (EMAT) to generate a single-mode symmetric and antisymmetric Lamb wave in alumin...

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Main Authors:	Yinghong Zhang, Zhenghua Qian, Bin Wang
Format:	Article
Language:	English
Published:	MDPI AG 2020-05-01
Series:	Applied Sciences
Subjects:	Lamb wave electromagnetic acoustic transducers (EMATs) mode control meander-line coil
Online Access:	https://www.mdpi.com/2076-3417/10/10/3491

id	doaj-1cb47a4b7668420d8d49b5ee1565cd20
record_format	Article
spelling	doaj-1cb47a4b7668420d8d49b5ee1565cd202020-11-25T02:36:25ZengMDPI AGApplied Sciences2076-34172020-05-01103491349110.3390/app10103491Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic TransducersYinghong Zhang0Zhenghua Qian1Bin Wang2State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaThe multimode and dispersion characteristics of Lamb waves make them difficult to apply to nondestructive evaluation. This paper presents a paired configuration of a meander-line coil electromagnetic acoustic transducer (EMAT) to generate a single-mode symmetric and antisymmetric Lamb wave in aluminum plates. In the paired structure, the bias magnetic field of the EMAT that generates symmetric mode Lamb waves is perpendicular to the plate surface, while the bias magnetic field of the EMAT that generates antisymmetric Lamb waves is parallel to the plate surface. The symmetric and antisymmetric exciting forces generated by these two EMATs are consistent with the dispersion equations of single symmetric and antisymmetric Lamb wave modes, respectively. The numerical simulations and experiments verified that the presented paired configurations of meander-line coil EMATs can effectively control the generation of single-mode Lamb waves at low frequencies.https://www.mdpi.com/2076-3417/10/10/3491Lamb waveelectromagnetic acoustic transducers (EMATs)mode controlmeander-line coil
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Yinghong Zhang Zhenghua Qian Bin Wang
spellingShingle	Yinghong Zhang Zhenghua Qian Bin Wang Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers Applied Sciences Lamb wave electromagnetic acoustic transducers (EMATs) mode control meander-line coil
author_facet	Yinghong Zhang Zhenghua Qian Bin Wang
author_sort	Yinghong Zhang
title	Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers
title_short	Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers
title_full	Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers
title_fullStr	Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers
title_full_unstemmed	Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers
title_sort	modes control of lamb wave in plates using meander-line electromagnetic acoustic transducers
publisher	MDPI AG
series	Applied Sciences
issn	2076-3417
publishDate	2020-05-01
description	The multimode and dispersion characteristics of Lamb waves make them difficult to apply to nondestructive evaluation. This paper presents a paired configuration of a meander-line coil electromagnetic acoustic transducer (EMAT) to generate a single-mode symmetric and antisymmetric Lamb wave in aluminum plates. In the paired structure, the bias magnetic field of the EMAT that generates symmetric mode Lamb waves is perpendicular to the plate surface, while the bias magnetic field of the EMAT that generates antisymmetric Lamb waves is parallel to the plate surface. The symmetric and antisymmetric exciting forces generated by these two EMATs are consistent with the dispersion equations of single symmetric and antisymmetric Lamb wave modes, respectively. The numerical simulations and experiments verified that the presented paired configurations of meander-line coil EMATs can effectively control the generation of single-mode Lamb waves at low frequencies.
topic	Lamb wave electromagnetic acoustic transducers (EMATs) mode control meander-line coil
url	https://www.mdpi.com/2076-3417/10/10/3491
work_keys_str_mv	AT yinghongzhang modescontroloflambwaveinplatesusingmeanderlineelectromagneticacoustictransducers AT zhenghuaqian modescontroloflambwaveinplatesusingmeanderlineelectromagneticacoustictransducers AT binwang modescontroloflambwaveinplatesusingmeanderlineelectromagneticacoustictransducers
_version_	1724800295293157376

Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers

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