scholarly journals Nonlinear Dynamic Bending and Domain Wall Motion in Functionally Graded Piezoelectric Actuators under AC Electric Fields: Simulation and Experiment

2006 ◽  
Vol 49 (2) ◽  
pp. 188-194 ◽  
Author(s):  
Yasuhide SHINDO ◽  
Fumio NARITA ◽  
Masaru MIKAMI ◽  
Fumitoshi SAITO
Keyword(s):  
Domain Wall ◽  
Electric Fields ◽  
Nonlinear Dynamic ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Piezoelectric Actuators ◽  
Functionally Graded ◽  
Ac Electric Fields ◽  
Simulation And Experiment ◽  
Functionally Graded Piezoelectric

Bending Behavior of Functionally Graded Piezoelectric Laminated Actuators under Electric Fields

2007 ◽  
Vol 336-338 ◽  
pp. 2619-2623
Author(s):  
Yasuhide Shindo ◽  
Fumio Narita
Keyword(s):  
Domain Wall ◽  
Electric Fields ◽  
Piezoelectric Actuator ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Functionally Graded ◽  
Experimental Results ◽  
Nonlinear Bending ◽  
Bending Behavior ◽  
Functionally Graded Piezoelectric

We present numerical and experimental results on the nonlinear bending behavior due to domain wall motion in functionally graded piezoelectric actuator under alternating current (ac) electric fields. A nonlinear finite element method is employed to analyze the dynamic response of functionally graded piezoelectric actuator. A phenomenological model of domain wall motion is used in computation, and the effects of ac electric field amplitude and frequency, number of layers, and property gradation on the deflection of the cantilever actuators are examined. Experimental results, which verify the model, are presented using a functionally graded bimorph. The numerical results agree very well with the experimental values.

Dynamic Electromechanical Response of Multilayered Piezoelectric Composites From Room to Cryogenic Temperatures for Fuel Injector Applications

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Yasuhide Shindo ◽  
Takayoshi Sasakura ◽  
Fumio Narita
Keyword(s):  
Domain Wall ◽  
Electric Field ◽  
Electric Fields ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Cryogenic Temperatures ◽  
Fuel Injector ◽  
Temperature Dependent ◽  
Piezoelectric Composites ◽  
Ac Electric Fields

This paper studies the dynamic electromechanical response of multilayered piezoelectric composites under ac electric fields from room to cryogenic temperatures for fuel injector applications. A shift in the morphotropic phase boundary (MPB) between the tetragonal and rhombohedral/monoclinic phases with decreasing temperature was determined using a thermodynamic model, and the temperature dependent piezoelectric coefficients were obtained. Temperature dependent coercive electric field was also predicted based on the domain wall energy. A phenomenological model of domain wall motion was then used in a finite element computation, and the nonlinear electromechanical fields of the multilayered piezoelectric composites from room to cryogenic temperatures, due to the domain wall motion and shift in the MPB, were calculated. In addition, experimental results on the ac electric field induced strain were presented to validate the predictions.

The Effect of Mechanical Prestress on Dielectric and Piezoelectric Response of PZT-5H at High Electric Fields

2000 ◽  
Author(s):  
Pavel M. Chaplya ◽  
Gregory P. Carman
Keyword(s):  
Domain Wall ◽  
Electric Fields ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Piezoelectric Response ◽  
Descriptive Model ◽  
Mechanical Loads ◽  
Detailed Explanation ◽  
Actual Material ◽  
High Electric Fields

Abstract The dielectric and piezoelectric response of PZT-5H ceramics at high electrical and mechanical loads is presented. The purpose of this study is to provide a detailed explanation of the effect of prestress on the induced polarization and strain. The material is electrically cycled (−2/+2 MV/m, 0/+2 MV/m, and −0.4/+2 MV/m) at constant mechanical prestress levels up to 175 MPa. A descriptive model is used to explain the results in terms of consecutive non-180° domain wall motion only. The response of the material depends on the non-180° domain wall motion produced by the balance between the applied electric field and prestress. The limitation of the model is that it neglects 0° and 180° domains contribution to the response of the actual material.

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