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Research Papers

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

[+] Author and Article Information
Yasuhide Shindo1

Department of Materials Processing, Graduate School of Engineering,  Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japanshindo@material.tohoku.ac.jp

Takayoshi Sasakura

Department of Materials Processing, Graduate School of Engineering,  Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japan

Fumio Narita

Department of Materials Processing, Graduate School of Engineering,  Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japannarita@material.tohoku.ac.jp

1

Corresponding author.

J. Eng. Mater. Technol 134(3), 031007 (May 07, 2012) (7 pages) doi:10.1115/1.4006504 History: Received September 27, 2011; Revised February 21, 2012; Published May 04, 2012; Online May 07, 2012

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.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of two domains

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Figure 2

Schematic drawing of (a) geometry and (b) finite element model for multilayered piezoelectric composite

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Figure 6

Variation of normal stress σzz as a function of x at y = 0 mm and z = 0.025 mm for piezoelectric composites under E0  = 1.65 MV/m at T = 20 K (a = 5.2, 5.0 mm, f = 400 Hz)

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Figure 7

Variation of electric field Ez as a function of x at y = 0 mm and z = 0.025 mm for piezoelectric composites under E0  = 1.65 MV/m at T = 20 K (a = 5.2, 5.0 mm, f = 400 Hz)

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Figure 8

The PZT phase diagram

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Figure 9

Calculated and experimental PZT phase diagrams

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Figure 5

Normal strain versus temperature at x = 0 mm, y = 3.1 mm, and z = 0 mm of piezoelectric composites under E0  = 0.2 and 0.5 MV/m (a = 5.2, 5.0 mm, f = 400 Hz)

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Figure 4

Normal strain versus ac electric field at x = 0 mm, y = 3.1 mm, and z = 0 mm of piezoelectric composite at T = 298 K and 20 K (a = 5.2 mm, f = 400 Hz)

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Figure 3

Experimental setup

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