Influence of flexoelectricity on an interface crack between two dissimilar dielectric materials

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dc.contributor.authorSládek, Jáncs
dc.contributor.authorSládek, Vladimírcs
dc.contributor.authorHrytsyna, Maryancs
dc.contributor.authorProfant, Tomášcs
dc.coverage.volume42cs
dc.date.issued2023-06-03cs
dc.description.abstractIn the present paper, the interface crack between two dissimilar dielectric materials under a mechanical load is investigated with including flexoelectricity effects. Flexoelectricity is a size dependent electro-mechanical coupling phenomenon, where the electric polarization is induced by a strain gradient in dielectrics. The strain gradients may potentially break the inversion symmetry in centrosymmetric crystals and polarization is observed even in all dielectric materials. The polarization is proportional to the strain gradients in the direct flexoelectricity. Layered composite structures are frequently utilized in microelectronics. Due to a poor adhesion of protection layer and basic material, the interface crack can be created there and for the prediction of failure of these structures it becomes essential to investigate distribution of the interfacial stress and strain fields. Governing equations in the gradient theory contain higher-order derivatives than in the standard continuum mechanics. Therefore, a reliable computational tool is required to solve these boundary-value problems. The mixed finite element method (FEM) is developed, where the standard C0 continuous finite elements are utilized for independent approximations of displacements and strains. The constraints between the strain gradients and displacements are satisfied by collocation at Gaussian integration points inside elements. In numerical examples, a parametric study is performed with respect to flexoelectric and elastic coefficients for both material regions. The influence of these parameters on the crack opening displacement is discussed.en
dc.formattextcs
dc.format.extent1584-1590cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationProcedia Structural Integrity. 2023, vol. 42, p. 1584-1590.en
dc.identifier.doi10.1016/j.prostr.2022.12.200cs
dc.identifier.isbn9781713870302cs
dc.identifier.issn2452-3216cs
dc.identifier.orcid0000-0002-2275-7309cs
dc.identifier.other187833cs
dc.identifier.researcheridAAM-3643-2020cs
dc.identifier.scopus10438966500cs
dc.identifier.urihttp://hdl.handle.net/11012/244977
dc.language.isoencs
dc.publisherElsevier B.V.cs
dc.relation.ispartofProcedia Structural Integritycs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2452321622007570?pes=vorcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2452-3216/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectDirect flexoelectricitygradient theoryen
dc.subjectpure mechanical loadinduced electric potentialen
dc.titleInfluence of flexoelectricity on an interface crack between two dissimilar dielectric materialsen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-187833en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:49:19en
sync.item.modts2025.01.17 16:46:59en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav mechaniky těles, mechatroniky a biomechanikycs
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