Determination of lamb wave dispersion data in lossy anisotropic plates using time domain finite element analysis. part II: application to 2-2 and 1-3 piezoelectric composite transducer arrays

G. Hayward, J. Hyslop

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The use of finite element modeling, combined with optical generation and detection of Lamb waves in plate structures, was extended to encompass periodic ceramic-polymer materials typical of those encountered in 1-3 and 2-2 piezoelectric composite array transducers. The resultant dispersion data was employed to predict the occurrence of Lamb wave-induced cross talk in composite monolithic arrays. The finite element modeling method was then used to simulate the dispersion behavior of two array structures that were subsequently manufactured: a 1-D 45% volume fraction linear array coupon and a 2-D 35% volume fraction array coupon. Excellent agreement between theory and experiment was obtained using impedance measurements and laser scans of the surface displacement profile at selected frequencies. Regions of strong inter-element cross-coupling were identified and these are shown to correlate very well with the dispersion data obtained for the dual-phase plate material. This work is considered to provide a useful basis for the design of wideband monolithic composite arrays and minimization of guided wave propagation along the array substrate.
Original languageEnglish
Pages (from-to)449-455
Number of pages7
JournalIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Volume53
Issue number2
DOIs
Publication statusPublished - Feb 2006

Keywords

  • acoustic dispersion
  • acoustic impedance
  • composite materials
  • finite element analysis
  • periodic structures piezoceramics
  • piezoelectric transducers
  • ultrasonics

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