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Fatigue Life Estimator

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Cycles to failure

524,288

log₁₀ N = 5.720

Reversals to failure

1,048,576

2Nf

Basquin S-N point

250.0 MPa

The stress-life line maps cyclic stress amplitude to the predicted cycles to failure.

Alternating Stress ±250 MPaCritical Section · 10^5.72 Cycles

Open Source and Easy to Use Elsewhere

This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.

Open source: review the implementation and see how the results are produced.

Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.