Kelvin-Voigt viscous damping

This relationship describes part of the physical problem being optimized:

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

Check the variables, signs and units against your intended model. The objective and constraints must use quantities available in the selected study; this equation page does not create a separate editable model feature.