S n diagram — Free Mechanical Engineering Illustration

Mechanical Engineering

S n diagram

Clean textbook-style engineering S-N fatigue plot on a white background. The horizontal axis is labeled cycle life or cycles to failure N / number of cycles and is shown on a logarithmic scale with tick marks at powers of ten. The vertical axis is labeled fatigue strength or stress S / stress amplitude. A single smooth dark fatigue curve starts high on the left at low cycle count, drops steeply at first, then continues descending more gradually and flattens toward the right near the endurance-limit region. Use thin black axes, clear labeled tick marks, and a simple black plotted line in standard engineering graph style.

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