Aspect ratio dependence of d15 measurements in Motorola 3203 material

Comyn, Tim P.; Tavernor, A.W

doi:10.1016/s0955-2219(00)00166-7

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The non-Standard shear sample shape considered here (figure 1(d)) is that of the second thickness shear resonance mode, already described by Berlincourt [27], and that was later analysed by other authors [25,28,29]. The following formula [25] is used here as the analytical solution of the wave equation for the second thickness shear resonance mode of motion, when the dimensional ratio given by t W (figure 1(d)) is fulfilled:…”

Section: Automatic Iterative Methods Applied To a Non-standard Shear ...mentioning

confidence: 99%

“…Based on observation of secondary resonance modes Cao et al [28] and Comyn and Tavernor [29] conclude that an aspect ratio of t/W = 1/20 is needed for those to be absent in order to obtain accurate measurements. Aurelle et al [25] studied the asymptotic approach of electromechanical coupling factors to a saturation value as W increases with respect to t and recommended a minimum value of t/W = 1/6 for the above quoted following expression to be valid.…”

Section: Automatic Iterative Methods Applied To a Non-standard Shear ...mentioning

confidence: 99%

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A non-Standard shear resonator for the matrix characterization of piezoceramics and its validation study by finite element analysis

Pardo¹,

Algueró²,

Brebøl³

2007

J. Phys. D: Appl. Phys.

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Standard shear samples used for piezoceramic characterization lead to underestimation of the piezoelectric shear coefficients due to its dynamical clamping at resonance. This work presents the application of Alemany et al.´s automatic iterative method to the resonance of a non-Standard shear sample, in order to determine the related complex parameters of piezoceramics, thus including losses, from impedance measurements. The matrix of dielectric, elastic and piezoelectric complex parameters that fully characterize a piezoceramic, a 6mm symmetry material, can be obtained from such shear data combined with the application of the method to three other electromechanical resonances, namely: the length extensional mode of long rods or rectangular bars, length poled; the thickness extensional mode of a thin plate or disk, thickness poled, and the radial mode of a thin disk, thickness poled. Shear results are here obtained for non-Standard samples of a commercial Navy type II piezoceramic, solving the underestimation of the coefficients in the Standard shear sample and allowing the improvement of the previously reported characteristic matrix from Standard samples. Three-dimensional Finite Element Analysis (FEA) modelling of the resonances of the three material samples used in the matrix characterization was here accomplished using the improved matrix of dielectric elastic and piezoelectric material coefficients including all losses. The comparison of the experimental resonance spectra of this piezoceramic samples and the FEA results obtained for the elastically, dielectrically and piezoelectrically homogeneous items modelled is here presented and discussed.

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Section: Automatic Iterative Methods Applied To a Non-standard Shear ...mentioning

confidence: 99%

Section: Automatic Iterative Methods Applied To a Non-standard Shear ...mentioning

confidence: 99%

A non-Standard shear resonator for the matrix characterization of piezoceramics and its validation study by finite element analysis

Pardo¹,

Algueró²,

Brebøl³

2007

J. Phys. D: Appl. Phys.

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“…Even for samples with w : t = 62: 1 and L : t = 27: 1, a coupling of the main shear resonance mode with other modes was observed. Later on, other authors 9 showed that even for a ratio of 20:1, extraneous resonances appear close to the main shear resonance mode but with reduced influence, so that reproducible measurements can take place.…”

mentioning

confidence: 99%

Choosing the best geometries for the linear characterization of lossy piezoceramics: Study of the thickness-poled shear plate

Pardo

Espinosa

García

et al. 2008

Applied Physics Letters

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Resonance modes of a thickness-poled piezoceramic shear plate are studied. When determining material properties from impedance measurements, it is required to obtain an uncoupled shear resonance. The shear resonance, which is electrically excited, results to a series of plate resonances, which is mechanically excited by this, when frequencies match. Thus, the condition of a high aspect ratio of the plate is not valid to eliminate coupling. Instead, the thickness ͑t͒ and lateral dimensions ͑L , w͒ of the plate must be tailored for each material. This approach was tested for a commercial piezoceramic and plates amenable for characterization obtained for aspect ratios below L : t =15:1 ͑L = w͒.

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Characterisation of the Vibration of an Ultrasonic Transducer for Guided Waves Applications

Zennaro¹,

Haig²,

O'Boy

et al. 2018

Lecture Notes in Electrical Engineering

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Aspect ratio dependence of d15 measurements in Motorola 3203 material

Cited by 8 publications

References 6 publications

A non-Standard shear resonator for the matrix characterization of piezoceramics and its validation study by finite element analysis

A non-Standard shear resonator for the matrix characterization of piezoceramics and its validation study by finite element analysis

Choosing the best geometries for the linear characterization of lossy piezoceramics: Study of the thickness-poled shear plate

Characterisation of the Vibration of an Ultrasonic Transducer for Guided Waves Applications

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