20.500.12556/RUL-117771 Izdelava in testiranje deske rolke diplomski projekt Construction and testing of skateboard Testirali smo deske rolke iz različnih vrst lesa in z ojačitvami ter jih primerjali z referenčno desko rolke. Za izdelavo deske rolke je bilo treba predhodno izdelati kalup, v katerem smo lepili deske iz furnirja. Obliko kalupa smo povzeli po naši referenčni deski rolke. Nato smo izdelali 2 deski rolke iz akacije, 2 iz akacije in dodano ojačitveno plastjo karbonskih vlaken in 3 deske rolke iz jesena. Vsem deskam rolke in 1 primerjalni komercialni deski rolke smo z upogibnim tri-točkovnim testom izmerili modul elastičnosti in upogibno trdnost. Pri modulu elastičnosti smo ugotovili, da so deske rolke, izdelane iz akacije, prenesle večje obremenitve kot naša primerjalna deska rolke. Deski rolke, ki sta bili ojačeni s karbonskimi vlakni, pa sta prenesli največje obremenitve med našimi preizkušanci. Ugotovili smo tudi, da jesen ni primerna lesna vrsta za desko rolke, saj ima zelo nizek modul elastičnosti. Pri upogibni trdnosti so bile ugotovitve podobne kot pri modulu elastičnosti. Največjo upogibno trdnost sta imeli deski iz akacije z ojačitvijo iz karbonskih vlaken, nato deski iz akacije ter originalna deska rolke. Pri deskah rolke iz jesena smo dobili zelo nizke upogibne trdnosti, kar zopet potrjuje, da jesen ni primeren za izdelavo deske rolke We tested skateboards made out of different types of wood, and compared them with a reference skateboard. To construct a skateboard, we first had to make a mould, in which the veneer would be compressed. The shape of the mould was taken from our reference skateboard. Then we made 2 skateboards from acacia wood, 2 from acacia wood with an added carbon-fibre-reinforced layer, and 3 skateboards from ash wood. We measured the elasticity and bending strength of all the skateboards and of one reference commercial skateboard with a three-point bending test. Concerning the modulus of elasticity, we established that the skateboards made from acacia wood could withstand greater forces than our reference skateboard, and the 2 skateboards reinforced with carbon fibres withstood the most force among all of the tested items. We also found that ash wood was not an appropriate wood type for skateboards because it had a very low modulus of elasticity. The results for the bending strength were similar to those for the modulus of elasticity. The skateboards made from acacia wood with carbon fibre reinforcement showed the biggest bending strength, while the second best results came from the acacia wood skateboards, followed by the original skateboard. The skateboards made from ash wood showed very low bending strength values, which again confirmed that this type of wood was not appropriate for making skateboards deska rolka testiranje akacija jesen skateboard testing acacia ash true false false [M. Volavšek] Slovenski jezik Angleški jezik Delo diplomskega projekta/projektno delo 2020-07-24 10:36:44 2020-07-24 10:36:48 2022-08-30 04:00:09 0000-00-00 00:00:00 2015 0 Ljubljana 2015 Ljubljana VII, 38 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 685.362 2427529 DIP_Volavsek_Matic_2015.pdf DIP_Volavsek_Matic_2015.pdf 1 EDEC359EE21269361D7CCF2BF90334BC cb5819e1888e20405b19c4b6f180474cd01c5bb63723ffc2861683a62f231b63 420c1175-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=131673 Biotehniška fakulteta 0 0 0