5 \(\mathcal{G}_{c}\int_{\Gamma}{ds}=\mathcal{G}_{c}\int_{\Omega}{\left(\frac{\left(1-\varphi\right)^{2}}{4\mathcal{l}}\mathcal{+l}\left|\nabla\varphi\right|^{2}\right)d\mathbf{x}}\) ,