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Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
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Piezoelectric nonlinear vibration focusing on the second-harmonic vibration mode
Ryohei Ozaki1, Yaoyang Liu1, Hiroshi Hosaka1
1Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8563, Japan.
Ultrasonics
|September 12, 2017
Summary
This study introduces a new nonlinear parameter for finite element method (FEM) analysis of piezoelectric devices. The research validates a novel nonlinear model for piezoelectric vibration, crucial for high-power applications.
Area of Science:
- Engineering
- Materials Science
- Physics
Background:
- High-power operation of resonant piezoelectric devices reveals nonlinear vibration phenomena.
- Existing finite element method (FEM) designs often neglect these nonlinearities.
- Accurate modeling is essential for reliable piezoelectric device performance.
Purpose of the Study:
- To incorporate a nonlinear parameter into FEM for piezoelectric devices.
- To develop a method for measuring this nonlinear parameter.
- To validate a nonlinear model for piezoelectric vibration analysis.
Main Methods:
- Focus on the second nonlinear parameter of compliance in the piezoelectric constitutive equation.
- Development of a nonlinear piezoelectric vibration model.
- Experimental evaluation and measurement of nonlinear parameters.
Main Results:
- The second nonlinear parameter influences vibration amplitude and tip velocity.
- Observed double-frequency velocity at resonance.
- Two independently measured nonlinear parameters showed good agreement.
Conclusions:
- The proposed nonlinear model provides a reasonable approach for piezoelectric vibration analysis.
- Accurate characterization of nonlinear parameters is vital for high-power piezoelectric devices.
- The validated model enhances FEM design procedures for nonlinear piezoelectric behavior.
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