poisson's ratio

Question

Poisson's ratio is ratio of:

RankGuru · Accepted Answer

When a material is stretched in one direction, it tends to contract in the directions perpendicular to the applied force. This effect is quantified by Poisson's Ratio ($\sigma$ or $
u$):
$\sigma = - \frac{	ext{Lateral Strain (}\Delta d / d	ext{)}}{	ext{Longitudinal Strain (}\Delta L / L	ext{)}}$
- For most common materials, $\sigma$ lies between $0.2$ and $0.4$.
- Theoretical range for stable, isotropic linear elastic materials is $-1 < \sigma < 0.5$.

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poisson's ratio

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