Malociklična nosilnost tečine ležaja z utrjeno kotalno površino; [Low cycle carrying capacity for bearing raceway with hardened rolling surface] : doktorsko delo; Lov cycle carrying capacity for bearing raceway with hardened rolling surface

(UL)

Malociklična nosilnost tečine ležaja z utrjeno kotalno površino = [Low cycle carrying capacity for bearing raceway with hardened rolling surface] : doktorsko delo

Kunc, Robert

Določanje nosilnosti kotalnega stika velikih aksialnih ležajev z majhno vrtilno hitrostjo s standardnimi kriteriji za določevanje nosilnosti kotalnega stika ni dalo zadovoljivih rezultatov. Pri ... uporabi velikih aksialnih ležajev z majhno vrtilno hitrostjo prihaja zaradi elastičnosti nosilne konstrukcije in načina obremenjevanja po obodu ležaja do kritičnih mest, na katerih nastopi trajna deformacija kotalnega stika. Na teh mestih se pojavi plastifikacija oziroma rast specifičnega plastičnega raztezka -mehkega- materiala obroča pod zakaljeno tečino. Posledica so lahko mikrorazpoke in kasnejše luščenje trde plasti tečine. Zaradi tega smo se odločili za preračun podpovršinskega napetostno deformacijskega stanja z elasto-plastičnim konstitutivnim modelom, ki z mehaniko poškodbe materiala povezuje izotropno in kinematično utrjevanje oziroma mehčanje. Model omogoča raziskavo poteka elasto-plastičnih napetosti in deformacij materiala ter določanje kritičnih mest za nastanek poškodb ter analizo njihovega širjenja. Na osnovi eksperimentalnih rezultatov smo za uporabljeni numerični model določili materialne parametre ležajnega obroča. Poškodbeni model smo s pomočjo razvitega končnega elementa integrirali v numerični model končnih elementov, s katerim je narejena simulacija odziva stika tekočine in kotalnega elementa na ciklično obremenitev in njena primerjava z eksperimentom, na osnovi katere se je potrdila pravilnost določanja realne dopustne stične sile kotalnega stika z uporabljenim modelom.

Type of material - dissertation

Publication and manufacture - Ljubljana : [R. Kunc], 2002

Language - slovenian

COBISS.SI-ID - 5274139

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Library	Call number – location, accession no. ...	Copy status
National and University Library, Ljubljana	GS II 529289 glavno skladišče	available - reading room
Faculty of Mechanical Engineering, Lj.	Dr KUNC R. Malociklična IN: 00047015	available - reading room

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Year	Impact factor		Edition		Category		Classification
Year	JCR	SNIP	JCR	SNIP	JCR	SNIP	JCR	SNIP

Links to authors' personal bibliographies	Links to information on researchers in the SICRIS system
Kunc, Robert	16173
Prebil, Ivan	09806

Source: Personal bibliographies and: SICRIS

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