Journal ArticleDOI
Analysis of methods for determining electromechanical coupling coefficients of piezoelectric elements
TLDR
In this paper, the EMCC of commonly seen piezoelectric elements is formulated and analyzed, and the results are in good agreement with those found by using Berlincourt's formula and the dynamic formula of Mason.Abstract:
An important characteristic of piezoelectric elements as energy converters is the energy conversion efficiency. The electromechanical coupling coefficient (EMCC) is commonly used as a measure of a piezoelectric elements' efficiency. The latest Standard on Piezoelectric recommends that EMCC be determined by the use of the Berlincourt et al. formula for a uniform electroelastic state, and the dynamic formula by Mason for near resonance frequencies. This paper is devoted to the analysis of these two formulas along with a third formula. The EMCC of commonly seen piezoelectric elements are formulated and analyzed. The comparison of the numerical results leads us to the following conclusions: 1. The formula of Berlincourt et al. is valid only for a uniform electroelastic state, 2. The dynamic formula of Mason gives the EMCC at a frequency equal to the arithmetic mean of resonance and the corresponding antiresonance frequencies, 3. The third formula for the EMCC is valid for both the static and dynamic electroelastic state of a piezoelement, and its results are in good agreement with those found by using Berlincourt's formula and the dynamic formula of Mason. >read more
Citations
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Proceedings ArticleDOI
Spurious resonance free bulk acoustic wave resonators
TL;DR: In this article, a device structure eliminating the spurious modes arising from lateral standing Lamb waves is presented, and the operating principle behind the device is described with the use of a simple model.
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Effective Electromechanical Coupling Coefficients of Piezoelectric Adaptive Structures: Critical Evaluation and Optimization
TL;DR: In this article, a critical analysis of methodologies to evaluate the effective (or generalized) electromechanical coupling coefficient (EMCC) for structures with piezoelectric elements is presented.
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TL;DR: This critical review focuses on PEH structures and materials associated with the two major energy conversions to improve PEH performance and provides insights for designing efficient structures and selection of proper piezoelectric materials for PEHs.
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Multi-physics interpolation for the topology optimization of piezoelectric systems
TL;DR: In this paper, two conditions that the three penalty exponents must satisfy for stable convergence are derived for one-dimensional problems and their effectiveness for twodimensional problems is investigated for static analysis of piezoelectric actuators.
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Spurious Resonance Suppression in Gigahertz-Range ZnO Thin-Film Bulk Acoustic Wave Resonators by the Boundary Frame Method: Modeling and Experiment
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References
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Journal ArticleDOI
Piezoelectric Crystals and Their Applications to Ultrasonics
Warren P. Mason,Hans Baerwald +1 more
TL;DR: Piezoelectric crystals and their application to ultrasonics were discussed in this paper, where the authors proposed a method for the extraction of the ultrasonic properties of these crystals.
Journal Article
Piezoelectric and piezomagnetic materials and their function in transducers
Journal ArticleDOI
Thickness‐Shear and Flexural Vibrations of Crystal Plates
TL;DR: In this article, the theory of flexural motions of elastic plates, including the effects of rotatory inertia and shear, is extended to crystal plates, and simple algebraic formulas are obtained relating frequency, dimensions, and crystal properties for resonances of special interest in design.
Book
The Theory of Piezoelectric Shells and Plates
TL;DR: The theory of Piezoelectric shell and plate is studied in this article, where the authors present an approximate method for computing Free and Forced Vibrations of Electroelastic Shells.
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