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 | - | - |
Common questions
- What is the Poisson's Ratio formula?
- Ratio of lateral to axial strain. It sits under Stress & Strain, Materials engineering in the EngiRef reference.
- What do the symbols in the Poisson's Ratio formula mean?
- In Poisson's Ratio, ν is poisson's ratio; εₜ is transverse strain; εₐ is axial strain.
- When does the Poisson's Ratio formula apply?
- Poisson's Ratio holds under this condition: Small strains; typical values depend on material.