Macroscopic description of the non-linear electro-mechanical coupling in ferroelectrics

• Autorzy: Bohle U. , Kamlah M. , Munz D. , Tsakmakis C.
• Języki publikacji: EN

Abstrakty

EN

Our objective is the construction of a phenomenological ferroelectricity model for general electro-mechanical loading histories, which is simple enough to be implemented in an FE-code with reasonable expenditure. In this paper, we motivate and verify the one-dimensional formulation of such a model. This is done by introducing remanent polarization and remanent strain as internal variables besides stress, strain, electric field and polarization. Polarization induced anisotropy is taken into account to the extent deemed necessary. For the sake of simplicity, no rate effects are included. By bilinear approximation the following characteristic phenomena of macroscopic ferroelectricity are represented: dielectric hysteresis, polarization induced piezoelectricity, butterfly hysteresis, ferroelastic hysteresis, mechanical depolarization, field dependent coercitive stress.

Słowa kluczowe

EN

piezoceramics; ferroelectricity; phenomenological modeling; finite element implementation

PL

elektromechanika

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Applied Mechanics and Engineering
• Rocznik: 2000
• Tom: Vol. 5, no 4
• Strony: 959--970
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Bohle U.

autor

Kamlah M.

autor

Munz D.

autor

Tsakmakis C.

• Forschungszentrum Karlsruhe GmbH, Institut für Materialforschung II Postfach 3640, D-76021 Karlsruhe, GERMANY