##  [Section Modulus](/section-modulus) 

  ##  [Section Modulus](https://engineering.quantumdictionary.io/section-modulus-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A geometric property of a cross-section defined as the ratio of the section's moment of inertia about a bending axis to the distance from the neutral axis to the extreme fiber; used to compute elastic bending stress by σ = M/S, where M is the bending moment and S is the section modulus.