20.500.12556/RUL-175320 Termomehanska analiza in napovedovanje dobe trajanja zvona motorja Thermomechanical analysis and lifetime prediction of the bell housing V okviru uporabe kosilnice BCS 622 za delo na kmetiji je po približno 40 letih delovanja med obratovanjem prišlo do zloma zvona. Ta dogodek je bil izhodišče za nastanek magistrskega dela, katerega cilj je analiza vzrokov poškodbe in določitev kritičnih mest. S pomočjo termomehanske analize in metode kritične ravnine je bilo preverjeno, ali lahko na podlagi pomerjene zgodovine obremenitev napovemo kritično mesto za nastanek poškodbe ter ocenimo dobo trajanja zvona. Dodatno je bila izvedena primerjava dveh materialov z vidika prenašanja obremenitev in dobe trajanja, kot tudi analiza različnih poškodbenih pravil za napoved trajnosti. Rezultati so pokazali, da je zvon iz sive litine bolj zdržljiv v primerjavi z aluminijevo zlitino. Pri oceni dobe trajanja se je pri zvonu iz aluminijeve zlitine kot bolj natančno izkazalo elementarno Minerjevo pravilo, medtem ko pri zvonu iz sive litine pa se je bolje obneslo Haibachovo pravilo. Študija prispeva k boljšemu razumevanju mehanizmov poškodb in življenjske dobe mehanskih komponent, kar omogoča izboljšanje konstrukcije ter optimizacijo materialov in metod ocenjevanja trajnosti v kmetijskih strojih. As part of using the BCS 622 mower for farm work, after approximately 40 years of operation, the bell housing broke during use. This event was the impetus for the creation of a master's thesis, whose aim is to analyze the causes of the damage and determine the critical locations. Using thermomechanical analysis and the critical plane method, it was examined whether the measured load history could be used to predict the critical location for damage initiation and to estimate the service life of the bell housing. Additionally, a comparison of two materials was performed in terms of load-bearing capacity and service life, as well as an analysis of different damage rules for durability prediction. The results showed that the bell housing made of gray cast iron is more durable compared to the one made of aluminum alloy. For the aluminium alloy bell housing, the elementary Miner’s rule proved to be more accurate in service life estimation, while for the gray cast iron bell housing, the Haibach rule performed better. The study contributes to a better understanding of damage mechanisms and the service life of mechanical components, enabling improvements in design and optimization of materials and durability assessment methods in agricultural machinery. zvon motorja statična analiza termična analiza dinamična analiza padavinska metoda metoda kritične ravnine doba trajanja bell housing static analysis thermal analysis dynamic analysis rainflow method critical plane analysis lifetime true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-10-24 08:30:26 2025-10-24 08:30:30 2025-12-10 03:34:21 0000-00-00 00:00:00 2025 0 0 XX, 84 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.422.24:620.19:631.3(043.2) 277323 256135683 45490.pdf 45490.pdf 1 BAC9B694E44DA56C5613C1E8AE1C71DA 70d7c35354ee3e4214fcc2e8c2f4f4e2770388f9737566a4bb4cda723e7812c4 a766fed0-b0a2-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=220768 Fakulteta za strojništvo 0 0 0