Question

The Poisson’s ratio links the lateral contraction of a material to the axial expansion

when it is loaded in uniaxial tension. Typical value of the Poisson’s ratio for a solid,

fully dense material ranges between 0.2 and 0.5. What would be the value range

in case the material was loaded in compression ? Explain your answer !!!

Answer 1

Poison ratio is generally defined as the ratio of lateral strain to the linear strain.in other word it's also defined as the change in width per unit width. Usually poison ratio is ranges from 0.20 to 0.5 for elastic materials.if the elasticity of material is more then the poison ratio is also more.poison ratio is measure of rocks strength.since poison ratio is dimensionless.and poison ratio changes from layer to layer.low poison ratio such as 0.1 to 0.25 for soft rocker which fracture easier.and high poison ratio is ranges between 0.35 to 0.50.which will say that rock is hard and difficult to fracture.

Coming to types of loading , since poison ratio is given by the ratio of lateral strain to linear strain , hence it will positive for tensile load.and it's negative for compressive load ,it may ranges from {-0.7 to 1 }.