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Two-dimensional modelling of multifrequency piezocomposites.

N Lamberti1, F R Montero de Espinosa, A Iula

  • 1Dipartimento d'Ingegneria dell'Informazione ed Ingegneria Elettrica, Università di Salerno, Fisciano (SA), Italy.

Ultrasonics
|March 13, 2001
PubMed
Summary

Researchers developed a new model for multifrequency piezoelectric composites, enhancing performance by coupling resonators of varying sizes. This model accurately predicts composite behavior, enabling optimized designs for improved device efficiency.

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Area of Science:

  • Materials Science
  • Acoustics
  • Piezoelectric Materials

Background:

  • Standard piezoelectric composites offer limited performance improvements.
  • Mechanical coupling of resonators can enhance piezoelectric composite performance.
  • Multifrequency composites utilize piezoelectric elements with varying lateral dimensions.

Purpose of the Study:

  • To develop and validate a predictive model for 2-2 connectivity multifrequency piezoelectric composites.
  • To investigate the resonance behavior of composites with varying piezoceramic strip dimensions.
  • To optimize the design of multifrequency piezoelectric composites.

Main Methods:

  • Development of a one-dimensional model for initial performance analysis.
  • Extension of a two-dimensional model for polymer-piezoceramic composites.

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  • Fabrication and experimental testing of composite samples with varied width-to-thickness ratios.

    • Main Results:

    • The developed models accurately predict the resonance behavior of 2-2 multifrequency composites.
    • Experimental results show good agreement with model predictions for multifrequency composites.
    • The model facilitates optimization of double composites compared to standard designs.

    Conclusions:

    • The validated model provides a powerful tool for designing enhanced multifrequency piezoelectric composites.
    • Mechanical coupling and varied resonator dimensions are key to improved composite performance.
    • This research enables optimized designs for advanced piezoelectric applications.