Stress
Stress, 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 formulas
\(\large{ \sigma = \frac{F}{A_c} }\) | |
\(\large{ \sigma = \lambda \; \epsilon }\) | (elastic modulus) |
\(\large{ \sigma = E \; \epsilon }\) | (Young's modulus) |
Where:
\(\large{ \sigma }\) (Greek symbol sigma) = stress
\(\large{ A_c }\) = area cross-section
\(\large{ \lambda }\) (Greek symbol lambda) = elastic modulus
\(\large{ F }\) = force
\(\large{ \epsilon }\) (Greek symbol epsilon) = strain
\(\large{ E }\) = Young's modulus