Journal ArticleDOI
A thermodynamically motivated model for ferroelectric ceramics with grain boundary effects
TLDR
In this paper, a micromechanically motivated model is embedded into an electromechanical coupled finite element formulation in which each grain is represented by a single finite element and the initial dipole directions are assumed to be randomly oriented to mimic the virgin state of the unpoled ferroelectric polycrystal.Abstract:
The aim of this paper is to capture the grain boundary effects taking into consideration the nonlinear dissipative effects of ferroelectric polycrystals based on firm thermodynamic principles. The developed micromechanically motivated model is embedded into an electromechanically coupled finite element formulation in which each grain is represented by a single finite element. Initial dipole directions are assumed to be randomly oriented to mimic the virgin state of the unpoled ferroelectric polycrystal. An energy-based criterion using Gibbs free energy is adopted for the initiation of the domain switching process. The key aspect of the proposed model is the incorporation of effects of the constraint imposed by the surrounding grains on a switching grain. This is accomplished by the inclusion of an additional term in the domain switching criterion that is related to the gradient of the driving forces at the boundary of the grains. To study the overall bulk ceramics behavior, a simple volume-averaging technique is adopted. It turns out that the simulations based on the developed finite element formulation with grain boundary effects are consistent with the experimental data reported in the literature.read more
Citations
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Journal ArticleDOI
Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr0.25Ti0.75]O3 ceramic
Tanmaya Badapanda,V. Senthil,S. K. Rout,Laécio S. Cavalcante,Alexandre Zirpoli Simões,T.P. Sinha,Simanchalo Panigrahi,M. M. de Jesus,Elson Longo,José Arana Varela +9 more
TL;DR: In this paper, the Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr0.25Ti0.75]O3 ceramic synthesized by solid state reaction were reported.
Journal ArticleDOI
Modeling of dielectric and piezoelectric response of 1-3 type piezocomposites
R. Jayendiran,A. Arockiarajan +1 more
TL;DR: In this paper, a thermodynamically consistent framework combining the phenomenological and micromechanical models was developed to predict the coupled behavior of 1-3 piezocomposites with different volume fractions and bulk piezoceramics.
Journal ArticleDOI
Non-linear electromechanical response of 1–3 type piezocomposites
R. Jayendiran,A. Arockiarajan +1 more
TL;DR: In this paper, a thermodynamically consistent uni-axial framework is developed to predict the nonlinear behavior of 1-3 piezocomposites with different volume fractions and bulk piezoceramics.
Journal ArticleDOI
Experimental and theoretical investigation of temperature-dependent electrical fatigue studies on 1-3 type piezocomposites
Y. Mohan,A. Arockiarajan +1 more
TL;DR: In this paper, a simplified macroscopic uni-axial model based on physical mechanisms of domain switching and continuum damage mechanics has been developed to predict the nonlinear fatigue behavior of 1-3 piezocomposites for temperature dependent electrical fatigue loading conditions.
Journal ArticleDOI
Electrical fatigue behaviour in lead zirconate titanate: an experimental and theoretical study
TL;DR: In this article, a simplified macroscopic model based on physical mechanisms of domain switching is developed to predict the nonlinear behavior of electrical fatigue in lead zirconate titanate (PZT) for different loading frequencies.
References
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Journal ArticleDOI
Study of electrical and mechanical contribution to switching in ferroelectric/ferroelastic polycrystals
TL;DR: In this article, a finite element model for polarization switching in polycrystalline lead lanthanum zirconate titanate (PLZT) is presented. But the model is restricted to a single domain that switches completely without a simulated domain wall motion and the possible dipole directions of each crystallite are assigned randomly subject to crystallographic constraints.
Journal ArticleDOI
A new criterion for domain-switching in ferroelectric materials
TL;DR: In this article, a new domain-switching criterion is proposed based on the experimental results of ferroelectric materials, which is in good agreement with experimental results, and the proposed criterion is found to match experimental results well.
Journal ArticleDOI
Computational modeling of rate-dependent domain switching in piezoelectric materials
TL;DR: In this article, a micromechanically motivated model for rate-dependent switching effects in piezoelectric materials is developed, where each element is assumed to represent an individual grain and related dipole (polarization) directions are initially randomly oriented at the element level to realistically capture the originally unpoled state of grains in the bulk ceramics.
Journal ArticleDOI
A Phenomenological Constitutive Law for Ferroelastic Switching and a Resulting Asymptotic Crack Tip Solution
TL;DR: In this article, an isothermal, multiaxial, phenomenological constitutive law for ferroelastic switching in polycrystalline ceramics is developed, which is valid for unpoled ferroelectric poramics loaded by mechanical stress but no electric fields or other materials in which permanent deformation accumulates by a similar volume conserving twinning mechanism.
Journal ArticleDOI
Micromechanical modeling of switching effects in piezoelectric materials : A robust coupled finite element approach
TL;DR: A micromechanically motivated model for piezoelectric materials has been developed in this paper, where differentially oriented grains are taken into account within the proposed model, whereby representative dipole directions attached to each grain are randomly oriented.