How does the Fatigue Life Calculator work?

Use S-N curves or Miner's rule for fatigue analysis Then: Calculate stress range and mean stress effects Then: Account for surface finish, size, and stress concentration.

Can you give an example of how to use the Fatigue Life Calculator?

Example: Input Stress range 200 MPa, material steel, 10⁶ cycle life, actual 5×10⁸ cycles required gives a result of Life exceeded; fatigue safe (Approximate S-N curve lookup).

Is the Fatigue Life Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Fatigue Life Calculator?

Our Fatigue Life Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Fatigue Life Calculator

Stress (psi)

S-N Factor (K)

Exponent (b)

Fatigue life estimation predicts component life under cyclic loading. Failure occurs at stress levels well below static strength.

Difficulty:advanced

References

›Fatigue Life — Wikipedia

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Fatigue Life Calculator

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Fatigue Life Calculator