fatique analysis
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What load is deforming the structure in a periodic way that builds up cycles of fatigue?
In Workbench, open Engineering Data, click on the material used in the model. There is a Life category in the Toolbox on the left. Drag out a S-N Curve and drop it on your material. Below is the example from Structural Steel. Enter the measured S-N data for your material in the blank yellow cells.
Some materials have a linear S-N relationship established on the log(N) scale. In that case, two parameters define the slope and intercept of that line. In that case you use the Linear S-N model.
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