Official Answer
Answer
A lokacin shigarwa, zoben yana faɗaɗa a kan sanda ko kwangila a cikin rami. Matsakaicin damuwa na fiber yana faruwa a cikin fiber na ciki don zoben waje kuma an ba shi ta $ S = \ frac {E t (D_s - D_i)}{(D_s - t)(D_i + t)}$, inda $D_s $ shine diamita na shaft kuma $ D_i $ shine ID na zobe. Idan $S$ ya wuce ƙarfin amfanin gona $S_y$, zoben zai fuskanci nakasar filastik (saitin dindindin). Don zoben Bakin Karfe 302, damuwa na shigarwa yakamata a iyakance shi zuwa kashi 80 na $S_y$. A cikin akwatunan gear sararin sama, ana amfani da sassan zobe na 'tapered' wani lokaci don samar da ƙarin rarraba damuwa iri ɗaya a kewayen zoben.
