PHYSICAL QUANTITY
Mechanical stress: formulas and units of measurement
Mechanical stress: symbol σ, unit Pa. Formulas and explanations for Mechanics.
\sigmaσ\text{Па}pascal
KEY CONNECTIONS
Formulas
\sigma=\frac{F}{S}σ = F / S
\sigma=E\left|\varepsilon\right|σ = E|ε|
\varepsilon=\frac{\Delta l}{l_0}ε = Δl / l₀
NOTATION
Quantities in formulas
- \sigma
- Mechanical stress is the internal force per unit cross-sectional area.
- F
- Force is a measure of the interaction of bodies that changes their movement or shape.
- S
- Area is the size of a surface or cross section.
- E
- Young's modulus is a characteristic of a material's resistance to elastic deformation.
- \varepsilon
- Relative deformation is the proportion of change in length compared to the initial length.
- \Delta l
- Elongation is a change in the length of a body during deformation.
- l_0
- Initial length - the length of the body before deformation.
DIRECTORY