Figure 4From: Elastic strain energy density decomposition in failure of ductile materials under combined torsion-tensionConstitutive equations for En8 steel. (a)\( {K}_{\mathrm{S}}\left({I}_1,\sqrt{J_2}\right) \) and (b)\( {G}_{\mathrm{S}}\left({I}_1,\sqrt{J_2}\right). \)Back to article page