Stress

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

stressStress, abbreviated as \(\sigma \) (Greek symbol sigma), is the force per unit area of cross-section.  The maximum stress of a material before it breaks is called breaking stress or ultimate tensial stress.

Stress formula

\(\large{ \sigma = \frac{F}{A} }\)

\(\large{ \sigma = E \; \epsilon }\)     (Young's modulus)

Where:

\(\large{ \sigma }\)  (Greek symbol sigma) = stress

\(\large{ A }\) = cross-section area

\(\large{ F }\) = force

\(\large{ \epsilon }\)  (Greek symbol epsilon) = strain

\(\large{ E }\) = Young's modulus

 

Tags: Equations for Strain and Stress