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Poisson’s Ratio
Liberty Educational Video
Critical Concepts – Poisson’s Ratio
ε = Strain (axial) = δ/LF
A
δ
L
Deformation Of A Core Sample Due To Uniaxial Compressive Load
Poisson’s Ratio:Ratio of relative radial expansion to relative axial shortening
Shortening ALONG sample:
ν = Poisson’s Ratio = εr / ε (-1 , ½)
εr = Strain (radial) = δr /RExpansion PERPENDICULAR to sample:
δr
R
Poisson’s Ratio of Jell-O
Poisson’s Ratio of Jell-O
Poisson’s Ratio of Jell-O
Poisson’s Ratio of Jell-O
Poisson’s Ratio of Jell-O
Poisson’s Ratio of Jell-O
31% shorter
~14% wider
Poisson’s Ratio: 0.43
Poisson’s Ratio of Jell-O
31% shorter
Poisson’s Ratio of Generic Gelatin
Poisson’s Ratio of Generic Gelatin
Poisson’s Ratio of Generic Gelatin
Poisson’s Ratio of Generic Gelatin
Poisson’s Ratio of Generic Gelatin
Poisson’s Ratio of Generic Gelatin
29% shorter
~13% wider
Poisson’s Ratio: 0.44
The Poisson’s Ratio of Jell-O, Wood & Rock
Simple Poisson’s Ratio Math Radial-Axial Strain Diagram
Poisson’s Ratio:The slope in a radial vs axial strain diagram
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