Results 261 to 270 of about 82,178 (282)
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Stress Dependency of the Thermoelastic and Piezoelectric Coefficients
AIAA Journal, 1997Abstract An analysis based on fundamental mechanics and thermodynamics is presented for a solid in which the elastic and piezoelectric coefficients are temperature dependent. It is proven that as a consequence of the temperature dependency, the thermal expansion and piezoelectric coefficients must be stress dependent.
Charles W. Bert, Victor Birman
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Material nonlinear piezoelectric coefficients for quartz
Journal of Applied Physics, 1983An electroelastic or polarizing effect can be used to obtain material nonlinear pizoelectric or electroelastic coefficients. It is shown that these material coefficients, obtained from general rotationally invariant nonlinear equations for small field superposed on a bias, differ from those obtained by using the phenomenological expansion of the ...
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Effective piezoelectric coefficients of ferroelectric 0–3 composites
Ferroelectrics, 2001Abstract We studied theoretically the effective piezoelectric strain coefficients of a 0–3 composite comprising spherical ferroelectric inclusions dispersed in a ferroelectric matrix. Tensile loading and hydrostatic loading conditions were considered.
C. K. Wong, Y. M. Poon, F. G. Shin
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Effective Piezoelectric Coefficients $$d_{ij}^{*}$$: From Microgeometry to Anisotropy
2018Piezoelectric coefficients dij are most widespread to describe the piezoelectric effect, electromechanical properties and other related parameters. The effective piezoelectric coefficients \(d_{ij}^{*}\) and their links to sensitivity are discussed for piezo-active composites with various connectivity patterns. Examples of the piezoelectric sensitivity
Topolov V. Y., Bowen C. R., Bisegna P.
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Inequality of direct and converse piezoelectric coefficients
Ferroelectrics, 1981Abstract It is demonstrated theoretically and experimentally that the direct and converse piezoelectric coefficients. ∂P/∂σ and ∂e/∂E, are not equal as is generally believed. The correct relationship between these coefficients is derived, and it is shown that the experimentally measured quantities analogous to the piezoelectric coefficients are equal ...
R. A. Anderson, R. G. Kepler
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Effective Piezoelectric Coefficient Calculation of Cymbal Piezocomposite
Ferroelectrics, 2002The "cymbal" metal-ceramic flextensional transducer has been developed for many actuator and sensor applications. In this device the ceramic driving element is sandwiched between two metallic endcaps with shallow cavities. The effective piezoelectric coefficient, d 33 eff , consists of the d 33 of the PZT disc and the contribution of the d 31 which is ...
P. Ochoa, M. Villegas, J. F. Fernández
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Piezoelectric Coefficients New Opportunities to Improve Sensitivity
2018Piezoelectric coefficients hij characterise a link between an external mechanical strain applied to a sample and an electric field caused by the direct piezoelectric effect. At the converse piezoelectric effect, the piezoelectric coefficients hij characterise the link between a mechanical stress in the sample and electric displacement.
Topolov V. Y., Bowen C. R., Bisegna P.
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