OOF2: The Manual

Mechanical:Viscosity:Isotropic
	6.4.1. Material Properties

Name

Mechanical:Viscosity:Isotropic — Isotropic linear viscosity.

Details

Property Category: ViscoElasticity
Parameters:

gijkl

Type: An object of the IsotropicRank4Tensor class.
Fields: Displacement
Fluxes: Stress

Description

Isotropic viscoelasticity is similar to isotropic elasticity, except that the modulus multiplies the first time derivative of the strain instead of the strain (6.2) itself. It makes a contribution of

g_{ijkl}\dot{\epsilon}_{kl}

(6.53)

to the Stress, where

\dot{\epsilon}_{ij}=\frac{1}{2}\left(\frac{\partial\dot{u}_{i}}{\partial x_{j}% }+\frac{\partial\dot{u}_{j}}{\partial x_{i}}\right),

(6.54)

is the strain rate and $\dot{u}$ is the time derivative of the Displacement field.


Mechanical:MassDensity:ConstantMassDensity		Mechanical:Damping:Isotropic

OOF2: The Manual

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