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Primerjava eksperimentalnih in teoretičnih pristopov za določanje realne kontaktne površine
Medle, Blaž (Author), Kalin, Mitjan (Mentor) More about this mentor... This link opens in a new window

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Abstract
Določanje realne kontaktne površine je v strojništvu velik problem, saj se v splošnem kontaktne pogoje računa z upoštevanjem nominalne kontaktne površine v kontaktu, ki je mnogo večja od dejanske. Upoštevanje te privede do izračuna milejših razmer v kontaktu in s tem na dejansko konstruiranje inženirskih aplikacij. V tej diplomski nalogi smo raziskovali, kakšen vpliv imajo različne materialne lastnosti na določanje realne kontaktne površine. Rezultati so pokazali, da na realno kontaktno površino vplivajo tako različne mehanske kot tudi različne topografske lastnosti. Poleg tega na razmere v kontaktu vplivajo tudi geometrijske spremembe vršičkov v kontaktu. Eksperimentalne rezultate smo nato primerjali z enim statističnim in dvema determinističnima pristopoma, ki jih uporabljamo za predvidevanje obnašanja v kontaktih. Vsak teoretični pristop ima svoje prednosti in pomanjkljivosti. Glavna pomanjkljivost so predpostavke, zaradi katerih prihaja do velikih razlik v primerjavi z razmerami v dejanskih kontaktih.

Language:Slovenian
Keywords:tribologija, realne kontaktne površine, deformacije vršičkov, topografije površin, deterministični pristopi, statistični pristopi
Work type:Final paper (mb12)
Tipology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2020
Publisher:[B. Medle]
Number of pages:XV, 50 f.
UDC:539.92:620.179.11(043.2)
COBISS.SI-ID:28855811 Link is opened in a new window
Views:18
Downloads:11
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Secondary language

Language:English
Title:Comparison of experimental and theoretical approaches for determing the real contact area
Abstract:
Determining real contact area is a big problem in engineering, since, in general the contact conditions are calculated with the assumption of nominal contact area in the contact, which is greater than the actual. Taking this into account leads to the calculation of milder conditions in contact and thus to the actual construction of engineering applications. In this diploma thesis we researched the influence of different material properties on the deformation of the real contact area. The results showed that the real contact area is affected by different mechanical, as well as different topographic properties. In addition, the contact conditions are also affected by the geometric changes of contacting asperities. The obtained experimental results were compared with one statistical and two deterministic approaches, which are used to predict behaviour in contact. Each theoretical approach has its advantages and disadvantages. The main disadvantage are the assumptions, that lead to large deviations compared to the behaviour in actual contacts.

Keywords:tribology, real contact areas asperity deformations, surface topographies, deterministic approaches, statistical approaches

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