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A phase-field model for transversely isotropic ferroelectrics

  • We propose an electro-mechanically coupled phase-field model for ferroelectric materials that show cubic–tetragonal phase transition. The cubic phase is idealized by an isotropic formulation, and the tetragonal phase is idealized by a transversely isotropic formulation. We consider a classical phase-field model with Ginzburg–Landau-type evolution of the order parameter. The order parameter drives the transition of all involved moduli tensors such as elastic, dielectric and piezoelectric moduli, which in turn maintain their typical features and stability as a result of a selected phase-transition function. The model is described in coordinate-invariant form and implemented into a finite element framework with implicit time integration of the evolution equation. Representative numerical examples in two and three dimensions demonstrate the main features of the constitutive model and the numerical stability of the formulation.

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Metadaten
Author: Omkar Nadgir, Wolfgang DornischORCiD, Ralf Müller, Marc-André Keip
DOI:https://doi.org/10.1007/s00419-019-01543-y
ISSN:0939-1533
ISSN:1432-0681
Title of the source (English):Archive of Applied Mechanics
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2019
Tag:Ferroelectrics; Ginzburg–Landau equation; Numerical simulations; Phase-field modeling; Transverse isotropy
Volume/Year:89
Issue number:6
First Page:1057
Last Page:1068
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Statik und Dynamik
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