Nonlinear flexoelectricity in extended thermodynamics

A nonlinear phenomenological model of flexoelectricity in thermoelastic solids is presented within the frame of continuum mechanics and extended thermodynamics, incorporating the quasi-electrostatic approximation where the time derivative of the electric displacement vector can be neglected in Maxwe...

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Published in:Archive of applied mechanics (1991) 2024-05, Vol.94 (5), p.1161-1175
Main Authors: El-Dhaba, A. R., Abou-Dina, M. S., Ghaleb, A. F.
Format: Article
Language:English
Subjects:
Boundary conditions
Classical Mechanics
Continuum mechanics
Couplings
Electrostriction
Engineering
Ferroelectric materials
Ferroelectricity
Hamilton's principle
Original
Piezoelectricity
Theoretical and Applied Mechanics
Thermodynamics
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container_title Archive of applied mechanics (1991)
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creator El-Dhaba, A. R.
Abou-Dina, M. S.
Ghaleb, A. F.
description A nonlinear phenomenological model of flexoelectricity in thermoelastic solids is presented within the frame of continuum mechanics and extended thermodynamics, incorporating the quasi-electrostatic approximation where the time derivative of the electric displacement vector can be neglected in Maxwell–Ampère’s law. An expression for the energy flux is proposed, including many internal variables. An advantage of the proposed model is that it presents a unified approach to study several thermo-electromechanical couplings, including electrostriction, piezoelectricity, dependence of entropy and spontaneous polarization on flexoelectricity, among others. The model may be of interest in revealing the effects of such couplings on the properties of polarizable media, in particular ferroelectrics, when simple boundary conditions prevail. For a fully dynamic description of flexoelectricity, Hamilton’s principle and the variational principle for external forces should be used instead.
doi_str_mv 10.1007/s00419-024-02554-0
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subjects Boundary conditions
Classical Mechanics
Continuum mechanics
Couplings
Electrostriction
Engineering
Ferroelectric materials
Ferroelectricity
Hamilton's principle
Original
Piezoelectricity
Theoretical and Applied Mechanics
Thermodynamics
title Nonlinear flexoelectricity in extended thermodynamics
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