Mehanske lastnosti starega hrastovega konstrukcijskega lesa : diplomsko delo = Mechanical properties of oak wood from historical constructions : B. Sc. thesis
Kavčič, Žan, 1995-
Raziskali smo gostoto ter nekatere mehanske lastnosti, povezane s staranjem lesa. Vzorčili smo hrastov (Quercus spp.) konstrukcijski les starosti od 4 let do 512 let z znanimi dendrokronološkimi ...podatki. Na 31 izbranih kolutih stare hrastovine smo v laboratorijskih pogojih izmerili v vseh anatomskih smereh lesa hitrost preleta ultrazvoka ter togost lesa. S statističnimi testi smo preverili še trdoto prečno na vlakna ter strižno trdnost vzporedno z vlakni. Glede na starost lesa smo ugotovili neznačilne spremembe gostote lesa, strižne trdosti lesa, hitrosti ultrazvoka ter dinamične togosti v vseh anatomskih smereh hrastovine. Največjo togost hrastovega lesa smo določili vzporedno z vlakni, 4-krat manjšo pa v radialni in tangencialni smeri. Trend počasnega zmanjševanja vrednosti s staranjem hrastovine, vendar statistično neznačilen, smo ugotovili pri trdoti lesa prečno na vlakna, v radialni in tangencialni smeri. Tudi specifična trdota, kot razmerje trdote in gostote lesa, je bila pri stari hrastovini nekoliko nižja kot pri recentnem hrastovem lesu.
Type of material - undergraduate thesis
; adult, serious
Publication and manufacture - Ljubljana : [Ž. Kavčič], 2019
Knjižnica BF za lesarstvo dv1 0000000112 IN: 020190022
Knjižnica BF za lesarstvo dv1 112 IN: 020190022
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