20.500.12556/DKUM-86174-c3306636-dc73-feae-a6a7-76eb8623831b Računski model za analizo trdnosti smrekovega lesa magistrsko delo Computational model for strength analysis of spruce wood Čeprav je les v uporabi že od pradavnine, je splošno razumevanje njegovega mehanskega obnašanja zelo skromno. V magistrskem delu je na osnovi rezultatov izvedenih statičnih in dinamičnih tri-točkovnih upogibnih preizkusov, bil določen materialni model smrekovega lesa. Vrednosti statičnih materialnih parametrov so bile določene s postopkom inverzne določitve, ki temelji na zaporednem izvajanju numeričnih simulacij. Na osnovi rezultatov dinamičnih upogibnih preizkusov je bila določena enačba S-N krivulje, na osnovi katere je bila potrjena S-N krivulja, pridobljena z numeričnimi simulacijami. Končen rezultat je bil razvit in potrjen materialni model, s katerim je mogoče predvideti odziv komponent iz smrekovega lesa izpostavljenih statični obremenitvi in napovedati njihovo življenjsko dobo pri cikličnem utripnem obremenjevanju v tangencialni orientaciji lesnih vlaken. Even though wood has been used for ages, the general understanding of its mechanical properties is sparse at best. In this master thesis, material model for spruce wood was calculated based on acquired results from static and dynamic three-point bending tests. Values of static material parameters were calculated with the process of inverse determination, which is based on sequential calculation of numerical simulations. Based on results of dynamic bending tests the equation of S-N curve was proposed, which was later used to validate the S-N curve acquired from results of numerical simulations. In the end a material model was proposed, which can be used to predict response of components made from spruce wood while subjected to static loading, and to predict the number of load cycles to material failure for components that are subjected to periodic pulsating loading in tangential orientation of wood fibres. smrekov les eksperimentalno testiranje numerične simulacije inverzna določitev materialnih parametrov S-N krivulja. spruce wood experimental tests numerical simulations inverse determination of material properties S-N curve. true true false [J. Fakin] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-10-17 12:00:35 2023-11-07 12:26:24 2023-12-05 03:13:20 0000-00-00 00:00:00 2023 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XIV, 72 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.4:674.032.475.5(043.2) 174755075 MAG_Fakin_Jure_2023.pdf MAG_Fakin_Jure_2023.pdf 1 88239E7AA1675E1C88D6CC679105AC3F caa87d316431e7e78f69968e56bb6e0b7540ed215c4de3927e56270ce3048cfc 1c92cb16-74e0-11ee-8e8c-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=173864 Fakulteta za strojništvo 0 0 0