Preračun mejne nosilnosti turbinske gredi na osnovi udarne žilavosti materiala
Gubeljak, Nenad ; Predan, Jožef
V prispevku je opravljena analiza celovitosti turbinske gredi z razpoko v najbolj kritičnih delih gredi na osnovi izmerjenih nateznih mehanskih lastnostih in udarne žilavosti materiala turbinske ...gredi. Na osnovi analize celovitosti je ocenjeno lomno obnašanje gredi med porušitvijo za primer radialnega širjenja utrujenostne razpoke in tudi njenega vzdolžnega širjenja glede na os gredi. Na osnovi opravljene analize je ocenjena mejna nosilnost gredi brez razpoke in tudi gredi z različno velikostjo in položajem razpok. Prav tako opravljenja analiza na osnovi korelacije med med udarno žilavostjo in lomno žilavostjo kaže, da predpisane vrednosti za material gredi zagotavljajo varno obratovanje brez nevarnosti porušitve gredi z velikostjo razpoke, ki jo je mogoče neporušno odkriti med rednimi letnimi pregledi.
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