EngiRef / Materials Engineering Formula
Poisson's Ratio
Poisson's Ratio: Ratio of lateral to axial strain. A Stress & Strain formula in materials engineering. Variables ν, εₜ and εₐ, each with SI and imperial units.
Stress & Strain
Specification
- Name
- Poisson's Ratio
- Discipline
- materials
- Category
- Stress & Strain
- LaTeX
- \nu = -\frac{\varepsilon_{transverse}}{\varepsilon_{axial}}
- Description
- Ratio of lateral to axial strain
- Conditions
- Small strains; typical values depend on material
- Can solve for
- ν, εₜ, εₐ
- Tags
- poisson, ratio, lateral, contraction
Variables
| Symbol | Name | Unit | Si Unit |
|---|---|---|---|
| ν | Poisson's Ratio | — | — |
| εₜ | Transverse Strain | — | — |
| εₐ | Axial Strain | — | — |