Official Answer
Answer
Ƙarfin ƙarar zoben $F_r$ an ƙaddara ta hanyar dabara $ F_r = D t \pi \ tau_{ult} / K$, inda $t$ shine kauri na zobe, $D$ shine diamita na tsagi, kuma $\tau_{ult}$ shine mafi girman ƙarfin kayan. Don yawancin karafan bazara, $\tau_{ult} \kimanin 0.6 \cdot \ sigma_{uts}$. A cikin aikace-aikacen da ke da tasiri mai girma ko nauyin girgiza, ƙimar tsaro $ K$ ya kamata a ƙara zuwa akalla 3. Idan $ F_r $ ya kasance ƙasa da nauyin sabis ɗin da ake buƙata, dole ne a ƙara girman zobe, ko kuma dole ne a ƙayyade zobe mai juyawa da yawa don rarraba shear a kan wani yanki mai girma.
