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Proučevanje trdnosti zobatih spojev lamel slojnatega lepljenega lesa z dinamičnimi testi : diplomsko delo = Study of the bonding strength of glulam finger joints by mechanical dynamic testing : B. Sc. thesisOmulec, MaticZ dinamičnimi testi smo proučevali trdnost zobatih spojev lamel slojnatega lepljenega lesa in jih primerjali z rezultati statičnih testov. Zaradi zakonodaje morajo biti testi trdnosti zobatih spojev ... redno izvedeni v skladu z zahtevami standarda SIST EN 14080. Test je dolgotrajen in porušen, zato smo preverili, ali je mogoče napovedovati upogibno trdnost z metodo frekvenčnega odziva, ki je neporušna in hitrejša za izvedbo. Dinamični testi so bili izvedeni v prečni in vzdolžni smeri. Potrdili smo, da je modul elastičnosti linearno odvisen od gostote lesa. Potrdili smo tudi, da obstaja povezava med akustičnimi in elastomehanskimi veličinami, določenimi v frekvenčnem odzivu, ter trdnostjo zobatih spojev. Zanesljivost napovedovanja je pri dinamičnih testih nižja kot pri statični togosti. Zanesljivost pri statični togosti je 51 %, med tem ko je pri dinamičnem upogibnem modulu 39 % in pri vzdolžnem modulu elastičnosti 25 %. Ugotovili smo, da samo z dušenjem zvoka in akustičnim koeficientom ne moremo predvidevati upogibne trdnosti. Determinacijski koeficient je pri teh rezultatih bil vedno nižji od 15 %. Pearsonov koeficient za korelacijo upogibne trdnosti in dinamičnega upogibnega modula ter korelacijo upogibne trdnosti in dinamičnega vzdolžnega modula je znašal 0,56 in 0,49, kar je manj kot korelacija upogibne trdnosti s statičnimi testi (0,71). To pomeni, da rezultati pridobljeni z dinamičnimi testi niso zadosten pokazatelj trdnosti.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Omulec], 2018Language - slovenianCOBISS.SI-ID - 2944905
Author
Omulec, Matic
Other authors
Straže, Aleš |
Šega, Bogdan |
Šernek, Milan
Topics
les |
slojnat lepljen les |
zobati spoji |
preizkušanje |
dinamični testi |
statični testi |
wood |
glulam |
finger joints |
testing |
dynamic tests |
static tests
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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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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Omulec, Matic | |
Straže, Aleš | 18149 |
Šega, Bogdan | 13057 |
Šernek, Milan | 16382 |
Source: Personal bibliographies
and: SICRIS
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