Pre- and post-buckling analysis of nanobeams

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buir.advisorJavili, Ali
dc.contributor.authorVardar, Onur
dc.date.accessioned2019-02-27T08:28:19Z
dc.date.available2019-02-27T08:28:19Z
dc.date.copyright2019-02
dc.date.issued2019-02
dc.date.submitted2019-02-25
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Mechanical Engineering, İhsan Doğramacı Bilkent University, 2019.en_US
dc.descriptionIncludes bibliographical references (leaves 77-80).en_US
dc.description.abstractInterest in nanobeams is increasing as their application areas widen and new properties are discovered. These structures exhibit size dependent intrinsic properties that are absent in macroscale. This requires employment of new material models as bulk models by themself are not sufficient to describe the physics unless one considers the domain as a composite material, which is undesirable. In this work it was confirmed that incorporation of surface elasticity results in a good match with experiments. Moreover it was shown that due to lack of out-of-plane shear support of surfaces and curves, Euler beam assumptions fail for numerical implementations when the beam size reduces. This phenomenon was shown to be a severe drawback for curved energetic domains with a still noticable effect for surface energies. A geometrically nonlinear buckling model is proposed based on linear elastic material model. It is implemented in an ordinary differential equations solver and the solutions were confirmed to meet the finite element method (FEM) results to a very high degree. The theory is integrated with surface layers in which its accuracy was confirmed when compared with FEM results.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2019-02-27T08:28:19Z No. of bitstreams: 1 Onur Vardar - MSc. Thesis - Ref. No. 10237621.pdf: 14010384 bytes, checksum: 578fbb70f7132aa3645c4015f092fb0b (MD5)en
dc.description.provenanceMade available in DSpace on 2019-02-27T08:28:19Z (GMT). No. of bitstreams: 1 Onur Vardar - MSc. Thesis - Ref. No. 10237621.pdf: 14010384 bytes, checksum: 578fbb70f7132aa3645c4015f092fb0b (MD5) Previous issue date: 2019-02en
dc.description.statementofresponsibilityby Onur Vardaren_US
dc.format.extentxvii, 86 leaves : charts ; 30 cm.en_US
dc.identifier.itemidB159829
dc.identifier.urihttp://hdl.handle.net/11693/50636
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBistable beamen_US
dc.subjectSnap-throughen_US
dc.subjectBucklingen_US
dc.subjectNanobeamen_US
dc.subjectSurface effecten_US
dc.titlePre- and post-buckling analysis of nanobeamsen_US
dc.title.alternativeNanokirişlerin burkulma öncesi ve sonrası analizien_US
dc.typeThesisen_US
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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