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dc.contributor.authorAbdollahi Hosnijeh, Amir
dc.contributor.authorArias Vicente, Irene
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III
dc.identifier.citationAbdollahi, A.; Arias, I. Conducting crack propagation driven by electric fields in ferroelectric ceramics. "Acta materialia", Novembre 2013, vol. 61, núm. 19, p. 7087-7097.
dc.description.abstractFerroelectric ceramics are susceptible to fracture under high electric fields, which are commonly generated in the vicinity of electrodes or conducting layers. In the present work, we extend a phase-field model of fracture in ferroelectric single crystals to the simulation of the propagation of conducting cracks under purely electrical loading. This is done by introducing the electrical enthalpy of a diffuse conducting layer into the phase-field formulation. Simulation results show oblique crack propagation and crack branching from a conducting notch, forming a tree-like crack pattern in a ferroelectric sample under positive and negative electric fields. Microstructure evolution indicates the formation of tail-to-tail and head-to-head 90° domains, which results in charge accumulation around the crack. The charge accumulation, in turn, induces a high electric field and hence a high electrostatic energy, further driving the conducting crack. Salient features of the results are compared with experiments.
dc.format.extent11 p.
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials ceràmics
dc.subject.lcshFerroelectric ceramics
dc.subject.otherCracks Computer simulation Crack propagation Electric field effects Ferroelectric ceramics Ferroelectricity Fracture Microstructure
dc.titleConducting crack propagation driven by electric fields in ferroelectric ceramics
dc.subject.lemacCeràmica ferroelèctrica
dc.contributor.groupUniversitat Politècnica de Catalunya. LACÀN - Mètodes Numèrics en Ciències Aplicades i Enginyeria
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorAbdollahi, A.; Arias, I.
local.citation.publicationNameActa materialia

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