##  [Goodman Diagram](/goodman-diagram) 

  ##  [Goodman Diagram](https://engineering.quantumdictionary.io/goodman-diagram-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A graphical mean‑stress versus alternating‑stress fatigue criterion that presents allowable combinations of mean (Sm) and alternating (Sa) uniaxial stresses for high‑cycle fatigue, usually plotted with a linear Goodman line or relation of the form Sa/Se + Sm/Sut ≤ 1 (or variant forms using yield strength), where Se is the endurance limit and Sut the ultimate tensile strength; used to assess whethe