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Vpliv togosti konzolnega vpetja na izračun dinamičnega modula elastičnosti = Cantilever clamping rigidity impact on dynamic modulus of elasticity calculationMerhar, Miran ; Bučar, Bojan, 1961-2012Članek prikazuje vpliv vpenjalnega razmerja konzolno vpetega bukovega preizkušanca (Fagus sylvatica) na izračun dinamičnega modula elastičnosti. Najprej smo vzorcu izmerili frekvenco prvega načina ... lastnega dušenega prečnega nihanja nosilca s prostima koncema. Nato smo skladno z Bernoulli-Eulerjevo teorijo za omenjene pogoje izračunali modul elastičnosti, ki nam je rabil za referenco. Preizkušanec smo zatem konzolno vpenjali od vpenjalnega razmerja 18 do 105 ter mu vsakokrat izmerili frekvenco prvega načina lastnega dušenega prečnega nihanja. Skladno s teorijo za togo konzolno vpetje smo izračunali modul elastičnosti in ga primerjali z referenčnim. Izkazalo se je, da je napaka pri manjših razmerjih vpetja okoli 20 %, pri večjih pa se zmanjša na 5 %. Razlog za veliko napako je nezadostna togost vpetja preizkušanca, ki je kljub zadostni togosti vpenjalnega sistema posledica kompresibilnosti preizkušanca v prečni smeri, saj je modul elastičnosti v radialni oz. tangencialni smeri več kot desetkrat manjši od modula vzporedno s potekom tkiva.Source: Zbornik gozdarstva in lesarstva = Research reports : forest and wood science & technology. - ISSN 0351-3114 (Št. 79, 2006, str. 85-92)Type of material - article, component part ; adult, seriousPublish date - 2006Language - slovenianCOBISS.SI-ID - 1448329
source: Zbornik gozdarstva in lesarstva = Research reports : forest and wood science & technology. - ISSN 0351-3114 (Št. 79, 2006, str. 85-92)
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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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Merhar, Miran | 22063 |
Bučar, Bojan, 1961-2012 | 01392 |
Source: Personal bibliographies
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