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Strength of Materials: Fatigue Limit

Calculate Fatigue Limit

It is also possible to calculate the fatigue limit based on how many cycles you would want the specimen to endure before it fails. To do this equations 1 through 3 would be used.

fatigue stress (1)

a fatigue stress equation (2)

b fatigue stress equation (3)

From equations Sut represents the ultimate tensile strength, Se represents the endurance limit, and f represents the fatigue strength fraction. The fatigue strength fraction can be found using the figure below.

Fatigue strength fraction graph

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