Resumen de Elastoplastic modeling for the ductile behavior of polycrystalline sodium chloride with SUVIC

Michel Aubertin, Denis E. Gill

• A unified viscoplastic model with evolutionary state variables, called SUVIC, is reduced to its rate-independent counterpart, and is applied to the inelastic behavior of polycrystalline sodium chloride (salt) in the ductile regime. The proposed model includes a von Misestype yield criterion, an associated flow rule, and three state variables, producing a mixed (kinematic and isotropic) hardening. The evolution laws are expressed through a particular formulation of the Voce law, which is mathematically similar to the Armstrong-Frederick formulation used in numerous mechanical models. This rate-independent version of SUVIC is a simple extension of the well-known two-surface models and can be reduced to various classical elastoplastic models.