Korelacije med udarno žilavostjo in nedestruktivno določenimi mehanskimi lastnostmi smrekovine : diplomsko delo - visokošolski strokovni študij

Pirman, Marko (author), Gornik Bučar, Dominika (mentor), Bučar, Bojan (co-mentor), Gorišek, Željko (reviewer)

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.

• Language: Slovenian
• Keywords: smrekovina, udarna žilavost, mehanske lastnosti, lom
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Pirman]
• Year: 2011
• Number of pages: X, 46 f., [20] f. pril.
• PID: 20.500.12556/RUL-632
• UDC: 630*812
• COBISS.SI-ID: 1981577
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Correlations between impact bending strength and non-destructively determined mechanical properties of spruce wood : graduation thesis - higher professional studies

Abstract

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.

• Keywords: spruce wood, impact bending strength, mechanical properties, fracture