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Določanje mehanskih lastnosti lepilnih spojev v bukovini z nedestruktivnimi metodami [Elektronski vir] : magistrsko delo = Determination of the mechanical properties of adhesive joints in beech wood using non-destructive methods : M. Sc. ThesisCapuder, MartinV raziskavi smo pri lepljenju bukovine, na podlagi razcepnega in tri-točkovnega preizkusa, dopolnjenega z dinamičnimi mehanski testi ter analizo akustične emisije (AE), vrednotili vpliv obdelave ... površine, orientiranosti in vlažnosti lesa na mehanske lastnosti lepilnih spojev. Del preizkušancev smo proučevali pri nižji (ur1 = 12 %) in višji ravnovesni vlažnosti (ur2 = 18 %), ter tudi umetno pospešeno starali (UPS). Lepilni spoji z brušeno površino so v vseh preizkusih dosegli najboljše rezultate. Ugotovili smo, da povišana vlažnost lesa negativno vpliva na mehanske lastnosti lepilnih spojev. Na skobljani površini smo pozitivni vpliv predpremaza, z izračunano višjo energijo pri lomu, potrdili le v razcepnem preizkusu. Nehomogena sestava preizkušancev, je zaradi različne usmerjenosti lesnega tkiva v prečnem prerezu lamel negativno vplivala na mehanske lastnosti lepilnih spojev, tudi po postopku umetno pospešenega staranja. Umetno pospešeno staranje je v lamelah in lepilnih spojih povzročilo strukturne napake, in zmanjšalo število ustreznih preizkušancev, zaradi česar vpliva postopka ni bilo mogoče izvrednotiti. Pri staranih preizkušancih smo zaznali povišan čas preleta ultrazvoka skozi lepilni spoj, kar pa ni bilo neposredno povezano z rezultati statičnih mehanskih preizkusov. Z metodo frekvenčnega odziva smo pri vzdolžnem vzbujanju določili vzdolžni modul elastičnosti za bukovino. Pri prečnem vzbujanju pa smo z isto metodo potrdili korelacijo med dinamičnim (EB') in statičnim (ES') navideznim modulom elastičnosti preizkušancev.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Capuder], 2023Language - slovenianCOBISS.SI-ID - 166565379
Author
Capuder, Martin
Other authors
Straže, Aleš |
Azinović, Boris |
Šernek, Milan
Topics
les |
lepilni spoj |
staranje |
statično testiranje |
nedestruktivne metode |
wood |
adhesive bonded wood |
aging |
static mechanical test |
nondestructive test
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Capuder, Martin | |
Straže, Aleš | 18149 |
Azinović, Boris | 35407 |
Šernek, Milan | 16382 |
Source: Personal bibliographies
and: SICRIS
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