Question

Limiting values of Poisson's ratio are:

• A. - 1 and 0.5
• B. - 1 and - 0.5
• C. 1 and - 0.5
• D. 0 and 0.5

Answer 1

The correct option is D 0 and 0.5

The ratio of lateral strain to longitudinal strain is known as poisson's ratio $\left(\mu \right)$.

$\mu =\frac{Lateralstrain}{Longitudinalstrain}$

For engineering materials. the value of poisson's ratio range between 0 to 0.5.

Material	Poisson's ratio $\left(\mu \right)$
Cork	0
Concrete	0.1-0.2
Aluminium	0.33
Cast iron	0.2 - 0.3
Steel	0.27-0.3
Perfectly elastic rubber	0.5

Note : Generally for metal such as (Steel, Copper, Aluminium etc.) the poisson's ratio value in the rang of 0.25 to 0.40.