20.500.12556/RUL-150408 Mehanske lastnosti sredice za smuči ojačane z naravnimi in sintetičnimi vlakni Mechanical properties of the ski core reinforced with natural in synthetic fibers Cilj diplomske naloge je bil preveriti elastomehanske in dušilne lastnosti lesenih sredic za smuči. Sredice iz različnih lesnih vrst in konstrukcijskih zasnov smo testirali statično upogibno in dinamično z metodo frekvenčnega odziva. Dodatno smo preverili dušilne lastnosti preizkušancev, ter deformacije po upogibnem cikličnem obremenjevanju. Ugotovili smo značilen pozitiven vpliv gostote lesa na togost testiranih sredic smuči, ki pa je bila odvisna tudi od konstrukcijske. Sredice smuči iz gostejših lesov so imele praviloma višje lastne frekvence, ter boljše dušenje vibracij s krajšim polovičnim uravnovesnim časom. Pri cikličnem obremenjevanju lesenih sredic je prihajalo do utrujanja materiala, ter povečevanja upogibnih deformacij. The aim of the study was to investigate the elastomechanical and damping properties of wood ski cores. Cores of different wood species and designs were tested statically for bending and dynamically using the vibration resonance method. In addition, the damping properties of the specimens and the deformation after cyclic bending were investigated. Wood density was found to have a significant, positive effect on the stiffness of the tested ski cores, which was also dependent on the structural stiffness. Ski cores made of denser woods tended to exhibit higher natural frequencies and better vibration damping with shorter equilibration times. Cyclic loading of wood cores resulted in material fatigue and increased bending deformation. smuči sredice za smuči mehanske lastnosti dušilne lastnosti skies ski cores mechanical properties damping properties true false false [D. Jug] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-09-17 07:15:12 2023-09-17 07:15:18 2023-10-02 11:31:03 0000-00-00 00:00:00 2023 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*835:630*812 230025 166568195 DIP_Jug_Domen_2023.pdf DIP_Jug_Domen_2023.pdf 1 73760EBD43E31103888A3F50A9DAD6A4 c03d9045b771080b6958673ee49ef21e3d17536f48cee8fd310bb53238408e13 36480cf2-5519-11ee-ae83-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=174988 Biotehniška fakulteta 0 0 0