20.500.12556/RUL-632 Korelacije med udarno žilavostjo in nedestruktivno določenimi mehanskimi lastnostmi smrekovine diplomsko delo - visokošolski strokovni študij Correlations between impact bending strength and non-destructively determined mechanical properties of spruce wood graduation thesis - higher professional studies Pri uporabi lesa v gradbene in konstrukcijske namene so bistvenega pomena njegove mehanske lastnosti. Določali smo udarno žilavost smrekovine (Picea abies L.) in iskali korelacijo med udarno žilavostjo, modulom elastičnosti in trdnostjo. Ugotavljali smo tudi vpliv gostote in hitrost priraščanja na udarno žilavost. Testni vzorec je zajemal po 100 desk in 100 plohov smrekovine, z znanim modulom in trdnostjo. Iz osnovnih vzorcev smo izžagali po 2 vzorca brez napak za testiranje udarne žilavosti po standardu DIN 52189. Rezultati raziskave kažejo na določeno šibko povezavo rezultatov testiranj celih preizkušancev in preizkušancev za določanje udarne žilavosti. Potrdili smo korelacijo med gostoto, hitrostjo priraščanja in udarno žilavostjo. Mechanical properties are essential when using wood for building and construction purposes. We determined the impact bending strength of spruce wood (Picea abies L.), and searched for correlations among the impact of bending strength, modulus of elasticity and strength. We also determined the effect of density and ring width on the impact bending strength. The specimen consisted of 100 boards and 100 spruce planks, with a known modulus of elasticity and strength. To test the impact bending strength according to DIN 52189 2 samples free of defects were cut from whole boards or planks. The results show some weak link among the test results of the whole samples compared to those cut ones to determine the impact bending strength. We confirmed the correlation among density, ring width and impact bending strength. smrekovina udarna žilavost mehanske lastnosti lom spruce wood impact bending strength mechanical properties fracture true false false [M. Pirman] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:26:27 2014-07-11 12:26:27 2022-07-11 10:37:06 0000-00-00 00:00:00 2011 0 Ljubljana 0 X, 46 f., [20] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*812 1981577 vs_pirman_marko.pdf vs_pirman_marko.pdf 1 C2E238EF9B8F663C63D1997A1A8DD057 e8e75395fcb2798d15b7535600725c40c08a525046fc9fb4576b63bc2c77b0ea 660f868e-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/58feedff-0d6e-4eef-9671-418b3c8d7a6b https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132442 Biotehniška fakulteta 0 0 0