Comparison of isotropic elasto-plastic models for the plastic metric   tensor $C_p=F_p^T\, F_p$
  We discuss in detail existing isotropic elasto-plastic models based on 6-dimensional flow rules for the positive definite plastic metric tensor $C_p=F_p^T\, F_p$ and highlight their properties and interconnections. We show that seemingly different models are equivalent in the isotropic case. 
Patrizio Neff and Ionel-Dumitrel Ghiba
math-ph math.CA math.MP