6. A 23.4 mm diameter cylindrical rod made from 2014-T6 aluminum alloy is subjected to a repeated tension-compression lo

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6 A 23 4 Mm Diameter Cylindrical Rod Made From 2014 T6 Aluminum Alloy Is Subjected To A Repeated Tension Compression Lo 1 (38.31 KiB) Viewed 69 times

6. A 23.4 mm diameter cylindrical rod made from 2014-T6 aluminum alloy is subjected to a repeated tension-compression load cycling along its axis. (20) (a) Compute the maximum and minimum loads that will be applied to yield a fatigue life of 1x10 cycles using the S-N curve data below. Assume a mean stress of 50 MPa. (b) If this rod were to fail, describe what the fracture surface might look like and why. (c) What might you do to prevent this failure and how would it help? 80 500 70 400 (MPa) 50 50 1045 steel 300 40 2014-T6 aluminum alloy Stress amplitude Stress amplitude (10 psi) 1 30 200 1 20 100 10 Red brass O 0 10% 10% 10° 10 lolo 104 106 10 Cycles to failure