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

• Autores: Michel Aubertin, Denis E. Gill
• Localización: International journal of plasticity, ISSN 0749-6419, Vol. 9, Nº 4, 1993, pág. 479
• Idioma: inglés
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• Resumen

  • 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.