$\newcommand{\Dev}{\operatorname{Dev}}$ $\newcommand{\dev}{\operatorname{dev}}$ $\newcommand{\grad}{\operatorname{grad}}$ $\newcommand{\divg}{\operatorname{div}}$ $\newcommand{\Ei}{\operatorname{Ei}}$ $\newcommand{\tr}{\operatorname{tr}}$

The material type for maximum shear stress damage criterion is “DC max shear stress”. For this criterion, $$\Xi\left(\mathbf{F}\right)=\max\left(\frac{\left|\sigma_{1}-\sigma_{2}\right|}{2},\frac{\left|\sigma_{2}-\sigma_{3}\right|}{2},\frac{\left|\sigma_{3}-\sigma_{1}\right|}{2}\right)$$ where $\sigma_{1},\sigma_{2},\sigma_{3}$ are the principal values of $\boldsymbol{\sigma}_{0}\left(\mathbf{F}\right)$ .

<criterion type="DC max shear stress"/>