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Vpliv sestave križno lepljenega lesa na upogibno trdnost in modul elastičnosti : diplomsko delo - visokošolski strokovni študij
Vrhovec, Andrej (Author), Šernek, Milan (Mentor) More about this mentor... This link opens in a new window, Šega, Bogdan (Co-mentor), Medved, Sergej (Reviewer)

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Abstract
Ugotavljali smo vpliv sestave križno lepljenih lesnih plošč na upogibno trdnost in modul elastičnosti. Testirali smo 6 plošč, 3 različno debelih slojev in 2 plošči s 5 sloji. Ugotovili smo, da debelina slojev ne vpliva na upogibno trdnost in modul elastičnosti izdelanih plošč ter da se z večanjem števila slojev izboljšujejo lastnosti v prečni, slabšajo pa v vzdolžni smeri plošče. Upogibna trdnost je bila pri obremenjevanju po robu višja kot pri obremenjevanju po ploskvi, in to ne glede na usmerjenost preizkušancev. Modul elastičnosti je bil višji pri obremenjevanju po ploskvi v vzdolžni kot tudi po robu v prečni smeri. Vse rezultate testiranj smo preverili matematično na osnovi teoretičnih izračunov. Izračunane vrednosti so se dokaj dobro ujemale z rezultati testiranja. Do odstopanj je prihajalo le pri upogibni trdnosti ploskovno obremenjenih preizkušancev v vzdolžni smeri. Lastnosti plošče pa so bile zelo odvisne od kakovosti lesa in lepilnih spojev. S testiranjem preizkušancev smo potrdili domnevo, da ima križno lepljen les ustrezne trdnostne lastnosti za uporabo v gradbene namene.

Language:Slovenian
Keywords:križno lepljen les, modul elastičnosti, upogibna trdnost, poliuretanska lepila, lepljenje
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2014
Publisher:[A. Vrhovec]
Number of pages:XII, 46 f., [15] f. pril.
UDC:630*833:630*824.839
COBISS.SI-ID:2201481 This link opens in a new window
Views:168
Downloads:73
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Secondary language

Language:English
Title:Influence of composition of cross laminated timber on the bending strength and modulus of elasticity
Abstract:
The composition influence of the cross laminated timber panels on the bending strength and the modulus of elasticity was researched. 6 panels having 3 differently thick layers, and 2 panels with 5 layers were tasted. It was found out that the thickness of the layers did not influence the bending strength or the modulus of elasticity; the higher number of layers improved the quality in transverse direction, and deteriorated it in the longitudinal direction. The bending strength was higher at edgewise bending as compared to the flatwise bending in any direction. The modulus of elasticity was higher at flatwise bending longitudinal direction and at the edgewise bending in transverse direction. All the data were verified mathematically on the basis of theoretical evaluations. The calculated results were very similar to the test results. It came to deviations at the bending strength of the longitudinal flatwise loaded test. The panel properties were highly depending on the wood quality and the quality of the laminated joints. Testing the samples the supposition was confirmed that the cross laminated timber had the proper attributes for construction building.

Keywords:cross laminated timber, modulus of elasicity, bending strength, polyurethane adhesive, adhesive bonding

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