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Acta Mechanica Solida Sinica

, Volume 32, Issue 1, pp 29–39 | Cite as

Development of an Omni-Directional Shear Horizontal Wave Transducer Based on a Radially Poled Piezoelectric Ring

  • Qiang Huan
  • Mingtong Chen
  • Ai-Kah Soh
  • Faxin LiEmail author
Article
  • 87 Downloads

Abstract

For the inspection of large plate-like structures, the omni-directional guided wave transducer-based system has been regarded as an effective tool since only a few transducers are required to cover the entire inspection area without blind zones. In comparison with Lamb waves, the shear horizontal (SH) wave is more promising because its fundamental mode is non-dispersive. In this work, we proposed an omni-directional SH wave piezoelectric transducer (OSH-PT) based on a radially poled \(\hbox {d}_{24}\)-mode PZT ring. Both the finite element simulations and experiments were carried out to demonstrate its performance in generating and receiving \(\hbox {SH}_{0}\) wave. Results showed that the radially poled OSH-PT could generate single-mode \(\hbox {SH}_{0}\) wave and receive \(\hbox {SH}_{0}\) wave only over a wide frequency range from 70 to 200 kHz. The obtained signal-to-noise ratio can reach up to 26 dB in generation and 24 dB in reception. The omni-directivity of this OSH-PT is also very good with the deviation only about 6% in both generation and reception of \(\hbox {SH}_{0}\) wave. Considering its easy fabrication, low cost and superior performances, this proposed OSH-PT may promote the applications of \(\hbox {SH}_{0}\) wave-based inspection in structural health monitoring and nondestructive testing.

Keywords

Omni-directional Guided wave Shear horizontal wave Piezoelectric transducer 

Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant No. 11672003.

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics 2018

Authors and Affiliations

  • Qiang Huan
    • 1
    • 2
  • Mingtong Chen
    • 1
  • Ai-Kah Soh
    • 3
  • Faxin Li
    • 1
    • 2
    Email author
  1. 1.LTCS and Department of Mechanics and Engineering Science, College of EngineeringPeking UniversityBeijingChina
  2. 2.Center for Applied Physics and TechnologyPeking UniversityBeijingChina
  3. 3.School of EngineeringMonash University MalaysiaBandar SunwayMalaysia

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