Determination of mechanical properties of beech wood

Predmet diplomske naloge je določitev štirih mehanskih lastnosti bukve na podlagi izvedenih raziskav pri upogibnem preizkusu in določitev linearne povezanosti med njimi na podlagi izračunanega korelacijskega koeficienta. Analizirali smo 74 preizkušancev bukovega lesa dimenzij 10×5×5, izrezanih tako, da nimajo vidnih napak. Raziskava je bila izvedena po standardu SIST EN 408:2010+A1:2012 z uporabo metode štiri-točkovni upogibni preizkus. V prvem delu diplomske naloge sem opisal vsa priporočila, povezana s to raziskavo, ter postopno opisal celotni potek raziskave, skupaj z vsemi pripravljalnimi deli. V drugem delu sem opisal analizirane mehanske lastnosti, dopolnjene s skicami in enačbami. Nato sem v tretjem delu opisal enačbe, po katerih sem opravil izračun ter prikazal pridobljene vrednosti lastnosti. S tem smo pridobili boljši občutek, kolikšne vrednosti upogibnih lastnosti bukve lahko pričakujemo in določili korelacijske koeficiente med njimi. V zaključku sem poudaril podobnosti pridobljenih vrednosti v primerjavi z vrednostmi iz podobnih raziskav na bukve ter primerjal naše vrednosti z vrednostmi lastnosti smreke.The subject of the bachelor\u27s thesis is the determination of four mechanical properties of beech wood on the basis of a conducted research in bending and the determination of the linear relationship between them on the basis of the calculated correlation coefficient. We analyzed 74 test pieces of beech wood, dimensions 10×5×5, cut in such a way that there are no visible defects. The research was carried out according to the SIST EN 408:2010 + A1:2012 standard with the use of the four-point bending test method. In the first part of the diploma thesis, I described all the recommendations taken into account for this research and gradually described the entire course of the research, together with all the preparatory work. In the second part, I described the analyzed mechanical properties, supplemented by sketches and equations. Then, in the third part, I described the method and equations by which I performed the calculation and showed the obtained values. With this, we gained a better sense of what values of the bending properties of beech can be expected and determined sufficient correlation coefficients between them. In the conclusion, I emphasized the similarity of the obtained value compared to the values from a similar study on beech and compared our values with the values of the properties of spruce