Question: Suppose that the fatigue data for the brass alloy in Problem 8.22 were taken from bending-rotating tests and that a rod of this alloy is

Suppose that the fatigue data for the brass alloy in Problem 8.22 were taken from bending-rotating tests and that a rod of this alloy is to be used for an automobile axle that rotates at an average rotational velocity of 1800 revolutions per minute. Give the maximum bending stress amplitude possible for each of the following lifetimes of the rod:

(a) 1 year,

(b) 1 month,

(d) 1 hour.

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