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Daily Concept Booster Civil Engineering : POISSON’S RATIO

            Poisson’s ratio (μ)

for homogeneous & Isotropic material elongation/contraction produced by any axial force in the direction of force is accompanied by contraction relongation in all transverse direction.
μ=[(lateral strain)/(Longitudental strain)]
Limit
(o≤μ≤0.5)

O → Cork
-1.5 → Rheotropic material (human tissue)

 

Poisson’s ratio Material
0.02-0.03

0.1-0.2

0.2-0.3

0.27-0.30

0.3

0.33

0.33-0.36

0.34

0.40

0.45-0.50

Glass

Concrete

Cast iron

Steel

Wrought iron

Aluminum

Copper

Brass & Bronze

Nylon

Rubber

 

→ if perfectly plastic material by applying load strain perpendicular to applied load direction is very less (approx. zero) so Poisson’s ratio has zero magnitude.
→ Ideal plastic
(μ=(-ϵy)/ϵx=0 )

 

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