4. Internal variables of the law of behavior

Here is a list of stored internal variables. Their names are also indicated.

\(V1\) to \(V6\) in 3D \(V1\) to \(V4\) in 2D	Components of the elastic strain tensor (requested by MFront)
\(V7\) in 3D (\(V5\) in 2D)	Equivalent plastic deformation \({\Vert {\epsilon }^{p}\Vert }_{\mathit{VM}}\): true thermodynamic internal variable: equPlasticStrain
\(V8\) in 3D (\(V6\) in 2D)	Volume plastic deformation \(\text{tr}{\epsilon }^{p}\): VolplasticStrain
\(V9\) in 3D (\(V7\) in 2D)	Dissipated mechanical energy density \(D(t)={\int }_{0}^{t}\mathrm{\sigma }\mathrm{:}{d\mathrm{\epsilon }}^{p}\): Dissipation
\(V10\) in 3D (\(V8\) in 2D)	Indicator of activation of plasticity (1) or not (0): PlasticIndex