what is poissson's ratio derive an expression for it in terms if the dimensions of the wire what is it unit.
Answers
Answer:
In materials science and solid mechanics, Poisson's ratio \nu is a measure of the Poisson effect, the deformation of a material in directions perpendicular to the specific direction of loading. The value of Poisson's ratio is the negative of the ratio of transverse strain to axial strain.
Answer: Poisson's ratio is a measure of a material's ability to deform in one direction when it is compressed in a perpendicular direction. It is calculated as the ratio of the relative contraction strain (or transverse strain) to the relative extension strain (or axial strain) in the direction of the applied force.
Explanation:
ρ = -(dA/dL) / (dL/dA)
where dA is the change in cross sectional area and dL is the change in length of the wire.
The units of Poisson's ratio are dimensionless.