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What is significance of S-N curve to design machine element for finite or infinite life cycle?
How can we use S-N curve in practical design of machine elements?
In practical design, we can use S-N curve to determine the allowable stress range for a given number of cycles of stress. We can also estimate the fatigue life of the machine element by comparing the stress range under a given load cycle with the S-N curve for the material. By doing so, we can ensure that the machine element lasts for its expected design life without premature failures.