Question: Load data on a part indicates that there are two values which exceed the fatigue limit stress of 5* 106 N/m2. These occur in proportions:

Load data on a part indicates that there are two values which exceed the fatigue limit stress of 5* 106 N/m2. These occur in proportions: 5* 106 N/m2 in proportion 2 loads/5 6* 106 N/m2 in proportion 3 loads/5 The S/N diagram indicates the following lifetimes: Load Cycles to Failure 5*10 N/m2 1 * 10 cycles 6*10 N/m2 1 * 104 cycles Using Miner's rule, what is the equivalent constant dynamic stress and life for this operating scenario? 5.6 * 106 N/m2 with life 1.4 * 104 cycles O Miner's rule does not apply for this case 6 * 106 N/m2 with life 1 * 104 cycles 5.7 * 106 N/m2 with life 1.72 * 104 cycles
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