From fatigue tests, the cyclic stress range for a metal alloy component to fail at 10' cycles with zero mean stress is 3

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answerhappygod
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From fatigue tests, the cyclic stress range for a metal alloy component to fail at 10' cycles with zero mean stress is 3

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From Fatigue Tests The Cyclic Stress Range For A Metal Alloy Component To Fail At 10 Cycles With Zero Mean Stress Is 3 1
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Engineering Materials Problem
Please provide the exact solution with steps.
The answer is provided in the second picture.
From fatigue tests, the cyclic stress range for a metal alloy component to fail at 10' cycles with zero mean stress is 350 MPa. By applying the Goodman Rule, what would be the cyclic stress range for failure at 107 cycles, if the component is also subjected to a tensile mean stress that is 20% of its ultimate tensile strength?
Δσση = 280 MPa
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