Study on EMAT configuration for generating SH waves

Tatsuya Hiramoto, Kodai Okazaki, Toshihiko Sugiura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Shear-Horizontal guided wave is ideal for nondestructive testing due to its simple dispersion characteristics. To generate SH waves, Electro-Magnetic Acoustic Transducer (EMAT) is more suitable than traditional piezoelectric transducers. Instead of known EMAT configurations such as PPM (Periodic Permanent Magnet), we propose an another configuration, which arrays several coils whose windings reverse alternately; Four sets of coils are placed next to each other, and two magnets are set to apply a magnetic field. We calculated dispersion curves to know the group velocities and to decide the optimal input frequency. Further, we did experiments to excite the zeroth-order symmetric mode, the lowest mode of SH wave, on an aluminum plate.

Original languageEnglish
Title of host publication40th Annual Review of Progress in Quantitative Nondestructive Evaluation - Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing
PublisherAmerican Institute of Physics Inc.
Pages444-449
Number of pages6
ISBN (Print)9780735412118
DOIs
Publication statusPublished - 2014 Jan 1
Event40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013 - Baltimore, MD, United States
Duration: 2013 Jul 212013 Jul 26

Publication series

NameAIP Conference Proceedings
Volume1581 33
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013
CountryUnited States
CityBaltimore, MD
Period13/7/2113/7/26

Keywords

  • Dispersion Curves
  • EMAT
  • Shear-Horizontal Wave
  • Ultrasonics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Hiramoto, T., Okazaki, K., & Sugiura, T. (2014). Study on EMAT configuration for generating SH waves. In 40th Annual Review of Progress in Quantitative Nondestructive Evaluation - Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing (pp. 444-449). (AIP Conference Proceedings; Vol. 1581 33). American Institute of Physics Inc.. https://doi.org/10.1063/1.4864853