(Solved): The shaft material is AISI 1018 cold-drawn steel. The gears seat against the shoulders and have hub ...

The shaft material is AISI 1018 cold-drawn steel. The gears seat against the shoulders and have hubs with setscrews to lock them in place. The effective centers of the gears for force transmission are shown. The keyseats are cut with standard end mills. The bearings are press-fit against the shoulders. Note: All fillets are 1/16:. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The material selected for the shaft design has an ultimate tensile strength, $S_{Ut}$, of $64\mathrm{kpsi}$ and a yield strength, $S_y$, of $54\mathrm{kpsi}$. Using the DE-Gerber failure criterion, calculate the minimum factor of safety at the critical section. What is the factor of safety against yielding? Assume a notch radius of 0.036 in. The minimum fatigue factor of safety at the critical section is The factor of safety against yielding is