2006-07-19 16:20:56 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
When you stretch a material, it tends to get shorter in the other two dimensions. The measure of this is Poisson's Ratio. See the link below for a detailed description.
By the way, Eric who answered below appears to have quoted word for word from the second link I have below....
2006-07-19 16:28:37 · answer #1 · answered by SkyWayGuy 3 · 0⤊ 0⤋
Definition of Poisson's ratio
Poisson's ratio n is the ratio of transverse contraction strain to longitudinal extension strain in the direction of stretching force. Tensile deformation is considered positive and compressive deformation is considered negative. The definition of Poisson's ratio contains a minus sign so that normal materials have a positive ratio.
n = - etrans / elongitudinal
In other words, you pull on something, the length changes and the diameter changes. The ratio is the percentage change in the diameter divided by the diameter change in length.
2006-07-19 16:30:58 · answer #2 · answered by eric l 6 · 0⤊ 0⤋
When you stretch something, it gets longer and it gets thinner. The change in "thickness" divided by the change in length is poisson's ratio.
2006-07-19 16:27:03 · answer #3 · answered by Caleb 1 · 0⤊ 0⤋
it is all about chemistry....analogies,elements, reactions, reflections and other boring things.
2006-07-19 16:24:00 · answer #4 · answered by Yannis K 3 · 0⤊ 0⤋