(a1)5.2 mm diameter cylindrical aluminum alloy rod is subjected to tension-compression cycling along its axis. Compute the maxim
um and minimum LOADS that correspond to a stress amplitude of 140 MPa and a mean stress of 35 MPa. (b) List and explain four measures that may be taken to increase the fatigue resistance of a given metallic component. The bulk of the specimen, the loading conditions and the temperature CANNOT BE CHANGED, only the specimen surface can. (25)
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