A-to-Z Guide to Thermodynamics,
Heat & Mass Transfer, and Fluids Engineering
English Русский 中文 Português Español Français Deutsch About Editors Contact us Access Begell House
View in A-Z Index
Number of views:
30779

When a bar of a solid material is loaded in tension longitudinally, the longitudinal extension is accompanied by a lateral contraction. The ratio between the lateral contraction per unit length and the longitudinal extension also per unit length is known as the Poisson's ratio. In the elastic regime, this ratio is a material constant with a value of about 0.3 for most metals.

In the literature the Greek letter ν is commonly used as the symbol for the Poisson's ratio.

Consider an elemental cube with its sides parallel to the three coordinate axes x,y,z. Under a stress system σx, σy, σz the strains are εx, εy, εz. The relationship between strains and stresses in the elastic regime is given by Hooke’s laws,

where E is Young’s modulus and ν is the Poisson's ratio.

Back to top © Copyright 2010-2022
A-Z Index Authors / Editors Semantic Map Visual Gallery Contribute Guest