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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/13581
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dc.contributor.authorKalpakides, V. K.en
dc.contributor.authorArvanitakis, A. I.en
dc.contributor.authorHadjigeorgiou, E. P.en
dc.date.accessioned2015-11-24T17:31:24Z-
dc.date.available2015-11-24T17:31:24Z-
dc.identifier.issn0376-9429-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/13581-
dc.rightsDefault Licence-
dc.subjectelastic ferroelectricsen
dc.subjectphase fielden
dc.subjectelectric field gradienten
dc.subjectelectric quadrupoleen
dc.subjectpoint charge defectsen
dc.subjectdipole defectsen
dc.subjectfinite-element implementationen
dc.subjectdomain-wallen
dc.subjectpolarized ceramicsen
dc.subjectgeneral-theoryen
dc.subjectpart ien
dc.subjectevolutionen
dc.subjectdielectricsen
dc.subjectthermoelectroelasticityen
dc.subjectdislocationsen
dc.subjectsimulationen
dc.titleThe role of electric field gradient in modeling elastic ferroelectricsen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primaryDOI 10.1007/s10704-010-9494-5-
heal.identifier.secondary<Go to ISI>://000281681200009-
heal.identifier.secondaryhttp://www.springerlink.com/content/f6232776110r65p0/fulltext.pdf-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικώνel
heal.publicationDate2010-
heal.abstractIn this article a continuum model for simulating the microscopic behavior of ferroelectrics is proposed. The model is based on an alternative phase field formulation, where spontaneous polarization, mechanical strain, electric field and electric field gradient are used as constitutive variables. The electric field gradient is energetically conjugated to the quadrupole polarization, thus it is about a theory with electric quadrupoles. A variational principle has been used for the derivation of the field equations and the appropriate boundary conditions. Like polarization vector, it is assumed that electric quadrupole tensor is separated into a reversible and a spontaneous part, too. It is proved that spontaneous quadrupole tensor is responsible for the domain wall thickness. Computational examples concerning ferroelectric materials with charge and dipole defects are carried out with the proposed model. The additional boundary conditions provided by the variational principle seem to be useful especially to handle dipole defects.en
heal.publisherSpringeren
heal.journalNameInternational Journal of Fractureen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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