Poisson Ratio

#Physics #Engineering
Tells how much a material streteches/deforms laterally relative to the load

$\displaystyle \nu=-\frac{\mathrm{d}\varepsilon _{\text{trans}} }{ \mathrm{d}\varepsilon _{\text{axial}}}$

• $\displaystyle \varepsilon _{\text{trans}}$ is the strain in the direction perpendicular to the load
• $\displaystyle \varepsilon _{\text{axial}}$ is the strain in the direction along the axis of the load
• More brittle materials generally have lower Poisson ratios while more elastic materials have higher Poisson ratios