# Difference between revisions of "Viscoelastic"

From Soft-Matter

Line 1: | Line 1: | ||

==Definition== | ==Definition== | ||

− | A substance that displays behavior that is both viscous and elastic is said to be '''viscoelastic'''. | + | A substance that displays behavior that is both viscous and elastic is said to be '''viscoelastic'''. In this sense, viscoelastic materials are said to be a combination of the ideal (elastic) Hookean solid and the (viscous) Newtonian liquid, along with a time a dependence. |

+ | |||

+ | ==Hookean Solid== | ||

+ | A Hookean solid is one that displays perfectly elastic behavior. This corresponds to the fact that an applied shear stress produces a shear strain in response. Recall that the shear stress (<math>/sigma</math>) is given by the applied force over the area which the force is applied, namely <math>/sigma = F/A</math>. | ||

+ | |||

+ | ==Newtonian Liquid== | ||

+ | |||

==References== | ==References== |

## Revision as of 16:14, 12 September 2009

## Definition

A substance that displays behavior that is both viscous and elastic is said to be **viscoelastic**. In this sense, viscoelastic materials are said to be a combination of the ideal (elastic) Hookean solid and the (viscous) Newtonian liquid, along with a time a dependence.

## Hookean Solid

A Hookean solid is one that displays perfectly elastic behavior. This corresponds to the fact that an applied shear stress produces a shear strain in response. Recall that the shear stress (<math>/sigma</math>) is given by the applied force over the area which the force is applied, namely <math>/sigma = F/A</math>.