Consider a 2014-T6 aluminum alloy the S–Nbehavior for which is shown below.

A cylindrical rod of diameter 11.9 mm fabricated from this alloyis subjected to repeated tension-compression loading along itsaxis. Compute (a) the maximum, and(b) the minimum loads that willbe applied to yield a fatigue life of 10⁸ cycles. Assumethat the data were taken for a mean stress of 30 MPa.

(a)

N

(b)

N