\(E_{\mathcal{l}}\left(\mathbf{\varepsilon}^{e}\mathrm{,}\mathbf{\varepsilon}^{p}\mathrm{,}\alpha\mathrm{,}\varphi\right)=\int_{\Omega}{\left\{g\left(\varphi\mathrm{,}p\right){\psi_{e}}^{+}\left(\mathbf{\varepsilon}^{e}\right)+{\psi_{e}}^{-}\left(\mathbf{\varepsilon}^{e}\right)+\psi_{p}\left(\alpha\right)\right\}d\mathbf{x}+\mathcal{G}_{c}\int_{\Omega}{[\frac{\left(1-\varphi\right)^{2}}{4\mathcal{l}}\mathcal{+l}\left|\nabla\varphi\right|^{2}]d\mathbf{x}}}\ ,\)