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Preisach model of hysteresis for the analysis of structures made of steel with pronounced yield plateau under cyclic loading

dc.contributor.advisorŠumarac, Dragoslav
dc.contributor.otherMandić, Rastislav
dc.contributor.otherMarković, Zlatko
dc.contributor.otherPerović, Zoran
dc.contributor.otherDolićanin, Ćemal
dc.creatorKnežević, Petar
dc.date.accessioned2021-05-07T12:48:06Z
dc.date.available2021-05-07T12:48:06Z
dc.date.issued2020-07-16
dc.identifier.urihttp://eteze.bg.ac.rs/application/showtheses?thesesId=8077
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:23559/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=21960969
dc.identifier.urihttps://nardus.mpn.gov.rs/handle/123456789/18276
dc.description.abstractU ovoj doktorskoj disertaciji biće razmatrano elastoplastično ponašanje konstruktivnih mekih čelika pri velikim naprezanjima u plastičnoj oblasti. Biće pokazano da je osnovna karakteristika naponsko deformacijskog dijagrama ove vrste čelika, formiranje horizontalnog platoa tečenja između zone elastičnosti i zone plastičnog ojačanja. Ovaj fenomen, koji se ispoljava u vidu lokalne nestabilnosti atomske rešetke (Lüders band) je samo karakteristika monotong naprezanja, dok kod ponovljenog naprezanja iščezava. Koristeći Preisach-ov histerezisni operator, razvijen je materijalni model, koji sa velikom tačnošću opisuje ponašanje ovih čelika pri monotonom aksijalnom naprezanju. Materijalni model u vidu analitičkog izraza za vezu dilatacija-napon veoma dobro aproksimira oblasti elastičnosti, horizontalnog platoa tečenja i plastičnog ojačanja, karakterističnih za konstruktivne meke čelike izložene ovoj vrsti naprezanja...sr
dc.description.abstractIn this doctoral dissertation, the elastoplastic behavior of structural mild steel under large deformations is explained. It will be shown that the stress-strain diagram's main characteristic of this steel type is the formation of a horizontal yield plateau between the elastic region and the plastic hardening region. This phenomenon, manifested in the form of local instability of the atomic lattice (Lüders band), is only a characteristic of monotonic loading, whereas in the case of alternating loading it disappears. Using Preisach's hysteresis operator, a material model was developed, describing with excellent accuracy the behavior of this type of steel under monotonic axial loading. The material model in the form of an analytical expression for the strain-stress relationship very well approximates the regions of elasticity, horizontal yield plateau, and plastic hardening characterized for structural mild steel under this type of loading.en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Београду, Грађевински факултетsr
dc.rightsopenAccessen
dc.sourceУниверзитет у Београдуsr
dc.subjectmeki čeliksr
dc.subjectmild steelen
dc.subjectcyclic plasticityen
dc.subjecthysteresisen
dc.subjecthysteresis loopen
dc.subjectenergy losesen
dc.subjectdamageen
dc.subjectPreisach operatoren
dc.subjectnumber of cyclesen
dc.subjectfatigueen
dc.subjectnonlinear analysisen
dc.subjectload historyen
dc.subjectciklična plastičnostsr
dc.subjecthisterezissr
dc.subjecthisterezisna petljasr
dc.subjectoštećenjesr
dc.subjectPreisach-ov operatorsr
dc.subjectbroj ciklusasr
dc.subjectzamorsr
dc.subjectnelinearna analizasr
dc.subjectistorija opterećenjasr
dc.titlePreisach-ov model histerezisa za analizu konstrukcija izrađenih od čelika sa izraženim platoom tečenja pri cikličnom opterećenjusr
dc.title.alternativePreisach model of hysteresis for the analysis of structures made of steel with pronounced yield plateau under cyclic loadingen
dc.typePhD thesis
dc.rights.licenseBY-NC-ND
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/71274/IzvestajKomisije28652.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/71273/Disertacija.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_nardus_18276


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