Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs

Lucas M. Martinho; Alan C. Kubrusly; Lei Kang; Steve Dixon

doi:10.1109/IUS52206.2021.9593803

Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs

Lucas M. Martinho, Alan C. Kubrusly, Lei Kang, Steve Dixon

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

Shear horizontal (SH) guided waves are commonly used in non-destructive evaluation and can be generated by permanent magnet electromagnetic acoustic transducers (PPM EMATs). PPM EMATs generate SH waves that propagate either forwards and backwards. This is often an undesired characteristic. Recently, we presented designs of PPM-like EMATs that generate SH waves in a single direction through the interference mechanism of two independent periodic sources of forces. In this paper, we present a line-source based analytical model to calculate the radiation pattern produced by multi-PPM EMATs and, in particular, by dual-PPM EMATs, which are able to generate SH waves in a single direction. The model was validated by computing the radiation pattern of a unidirectional side-shifted dual-PPM EMAT, showing good agreement with experimental and numerical results.

Original language	English
Title of host publication	2021 IEEE International Ultrasonics Symposium (IUS)
Publisher	Institute of Electrical Engineers
Number of pages	4
ISBN (Electronic)	9781665403559
ISBN (Print)	9781665447775
DOIs	https://doi.org/10.1109/IUS52206.2021.9593803
Publication status	Published - 15 Nov 2021
Event	2021 IEEE International Ultrasonics Symposium - Online, China Duration: 11 Sept 2021 → 16 Sept 2021

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Conference

Conference	2021 IEEE International Ultrasonics Symposium
Abbreviated title	IUS 2021
Country/Territory	China
Period	11/09/21 → 16/09/21

Keywords

dual-PPM EMAT
EMAT
line sources
radiation diagram
SH guided waves
unidirectional generation

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10.1109/IUS52206.2021.9593803

Martinho_et_al_IUS2021_1_
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Accepted author manuscript (Post-print), 2.04 MB

Cite this

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title = "Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs",

abstract = "Shear horizontal (SH) guided waves are commonly used in non-destructive evaluation and can be generated by permanent magnet electromagnetic acoustic transducers (PPM EMATs). PPM EMATs generate SH waves that propagate either forwards and backwards. This is often an undesired characteristic. Recently, we presented designs of PPM-like EMATs that generate SH waves in a single direction through the interference mechanism of two independent periodic sources of forces. In this paper, we present a line-source based analytical model to calculate the radiation pattern produced by multi-PPM EMATs and, in particular, by dual-PPM EMATs, which are able to generate SH waves in a single direction. The model was validated by computing the radiation pattern of a unidirectional side-shifted dual-PPM EMAT, showing good agreement with experimental and numerical results. ",

keywords = "dual-PPM EMAT, EMAT, line sources, radiation diagram, SH guided waves, unidirectional generation",

author = "Martinho, {Lucas M.} and Kubrusly, {Alan C.} and Lei Kang and Steve Dixon",

note = "Funding Information: This work was supported in part by the Coordenac¸{\~a}o de Aperfeic¸oamento de Pessoal de N{\'i}vel Superior – Brasil (CAPES) – Finance Code 001, and the Carlos Chagas Filho Foundation for Research Support of Rio de Janeiro State (FAPERJ). Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE International Ultrasonics Symposium, IUS 2021 ; Conference date: 11-09-2021 Through 16-09-2021",

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Martinho, LM, Kubrusly, AC, Kang, L & Dixon, S 2021, Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs. in 2021 IEEE International Ultrasonics Symposium (IUS). IEEE International Ultrasonics Symposium, IUS, Institute of Electrical Engineers, 2021 IEEE International Ultrasonics Symposium, China, 11/09/21. https://doi.org/10.1109/IUS52206.2021.9593803

Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs. / Martinho, Lucas M.; Kubrusly, Alan C.; Kang, Lei et al.
2021 IEEE International Ultrasonics Symposium (IUS). Institute of Electrical Engineers, 2021. (IEEE International Ultrasonics Symposium, IUS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N1 - Funding Information: This work was supported in part by the Coordenac¸ão de Aperfeic¸oamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001, and the Carlos Chagas Filho Foundation for Research Support of Rio de Janeiro State (FAPERJ). Publisher Copyright: © 2021 IEEE.

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N2 - Shear horizontal (SH) guided waves are commonly used in non-destructive evaluation and can be generated by permanent magnet electromagnetic acoustic transducers (PPM EMATs). PPM EMATs generate SH waves that propagate either forwards and backwards. This is often an undesired characteristic. Recently, we presented designs of PPM-like EMATs that generate SH waves in a single direction through the interference mechanism of two independent periodic sources of forces. In this paper, we present a line-source based analytical model to calculate the radiation pattern produced by multi-PPM EMATs and, in particular, by dual-PPM EMATs, which are able to generate SH waves in a single direction. The model was validated by computing the radiation pattern of a unidirectional side-shifted dual-PPM EMAT, showing good agreement with experimental and numerical results.

AB - Shear horizontal (SH) guided waves are commonly used in non-destructive evaluation and can be generated by permanent magnet electromagnetic acoustic transducers (PPM EMATs). PPM EMATs generate SH waves that propagate either forwards and backwards. This is often an undesired characteristic. Recently, we presented designs of PPM-like EMATs that generate SH waves in a single direction through the interference mechanism of two independent periodic sources of forces. In this paper, we present a line-source based analytical model to calculate the radiation pattern produced by multi-PPM EMATs and, in particular, by dual-PPM EMATs, which are able to generate SH waves in a single direction. The model was validated by computing the radiation pattern of a unidirectional side-shifted dual-PPM EMAT, showing good agreement with experimental and numerical results.

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ER -

Computation of the radiation pattern of unidirectional SH wave generated by dual-PPM EMATs

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