Kelvin-Voigt viscous damping

Understand the Kelvin-Voigt viscous damping relationship used by Equation contract.

Where to find it

Equation contract → equations

How to use it

Compare the terms, signs and units with your intended physical assumptions before choosing model inputs.

Result

Equation: \boldsymbol{\sigma}_{v}=\mathsf D_v:\dot{\boldsymbol{\varepsilon}},\quad\mathsf D_v\succeq0.

Troubleshooting

The equation describes the model assumptions; it is not a separate editable boundary condition. Check the parent physics page for setup and limitations.