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e. A cylindrical rod of diameter 14.7 mm fabricated from a 2014-T6 Aluminum alloy (characteristics shown below) is subjected to a repeated tension-compression load cycling along its axis. Compute the maximum and minimum loads that will be applied to yield a fatigue life of 1.0 x 106 cycles. Assume that data in figure below were taken for repeated axial tension-compression tests, that stress plotted on the vertical axis is stress amplitude, and data were taken for a mean stress of 50 MPa. [5 points].
Stress amplitude, S (MPa) 500 400 300 200 100 0 10³ 104 105 1045 steel 2014-T6 aluminum alloy Red brass 10² 106 108 10⁹ 80 70 60 50 40 30 20 10 10 1010 Stress amplitude (10³ psi)