Measurement and modelling for the dispersion relations of acoustic waves propagating in a free piezoelectric plate

C. H. Yang*, M. F. Huang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

2 Scopus citations

Abstract

This research is focused in the measurement and modelling of the dispersion relations of Lamb waves propagating in a piezoelectric plate. A theoretical model based on a partial wave analysis is used to provide numerical calculations for the dispersion relations of Lamb waves propagating in an LiNbO3 plate with different propagating directions. The dispersion relations are presented in an innovative image format. A non-contact laser ultrasound technique operated in B-scan mode with the aid of double Fast Fourier transform signal-processing scheme is used to measured multi-mode dispersion realtions. Among all the propagation angles, the measured dispersion curves show good agreement with the theoretical calculations. The Rayleigh wave speeds are extracted from the measured and calculated dispersion curves, showing favorable comparison with classical theory by Campbell.

Original languageEnglish
Pages (from-to)311-318
Number of pages8
JournalJournal of Mechanics
Volume19
Issue number2
DOIs
StatePublished - 2003

Keywords

  • Dispersion
  • Lamb wave
  • Laser ultrasonics
  • LiNbO

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