Question

The maximum value of Poisson's ratio for an elastic material is

• A. $0.25$
• B. $0.5$
• C. $0.75$
• D. $1.0$

Answer 1

The correct option is B $0.5$

Poisson's ratio, $\mu =\frac{-\text{Lateral strain}}{\text{Longitudinal strain}}$
The poisson's ratio of a stable, isotropic, linear elastic material cannot be less than $-1.0$ and nor greater than $0.5$ due to the requirement that Young's modulus, shear modulus and bulk modulus have positive values.