Official Answer
Answer
Rashin ƙarfi na zobe yana faruwa a lokacin da nauyin tura $P$ ya zarce ƙarfin juzu'in kayan zobe. Ƙarfin shear shine $\tau = \frac{P}{\pi D t}$. Don wani abu kamar Carbon Karfe SAE 1070, ƙarfin juzu'i ya kai kusan $0.6$ sau na ƙarshe ƙarfin juzu'i. A cikin yanayin tasiri, dole ne a yi amfani da ma'aunin nauyi mai ƙarfi $K_i$, yawanci $2.0$ ko sama, kamar $P_{dynamic} = K_i \cdot P_{static}$. Zane yana da lafiya idan $\tau_{dynamic} <\frac{\tau_{ult}}{S_f}$.
