Modified Goodman Method Fatigue Curve Equation

Strength and Mechanics of Materials

Modified Goodman Method 

Stress Compression

Average Stress

Stress Amplitude

Drawing Modified Goodman Diagram

Goodman Curve

Factors of Safety

The Factor of Safety depends on how the stresses behave. They might:

1. Grow proportionately
2. Only grow in mean
3. Only grow in alternating

How they behave depends on the actual hardware and loading involved.

Mean Stress vs Alternating Stress Curve

 

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