(Solved): help Suppose that the fatigue data shown in the Animated Figure: S-N Plot for Steel is for a steel a ...

Suppose that the fatigue data shown in the Animated Figure: S-N Plot for Steel is for a steel alloy that was tested using bendingrotating tests. A rod of this alloy is to be used for an automobile axle that rotates at an average rotational velocity of 900 revolutions per minute. Give the maximum lifetimes of continuous driving that are allowable for the following stress levels: (a) $450\mathrm{MPa}$ hours (b) $380\mathrm{MPa}$ hours (c) $310\mathrm{MPa}$ hours Stress amplitude (MPa)