Finite strain micromorphic pressure-sensitive plasticity / R. A. Regueiro in Journal of engineering mechanics, Vol. 135 N°3 (Mars 2009)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 135 N°3 (Mars 2009) . - pp. 178-191 Titre : Finite strain micromorphic pressure-sensitive plasticity Type de document : texte imprimé Auteurs : R. A. Regueiro, Auteur Article en page(s) : pp. 178-191 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Plasticity Strain Pressure Thermodynamics Microstructure. Résumé : A finite strain micromorphic pressure-sensitive plasticity model is formulated starting with thermodynamically conjugate stresses and plastic deformation rates in the reduced dissipation inequality, written in the intermediate configuration. Isotropic linear elasticity and nonassociative Drucker–Prager plasticity with cohesion hardening/softening are assumed for the constitutive equations. The reduced dissipation inequality dictates three levels of plastic evolution: (1) evolution of Fp, the plastic part of the deformation gradient; (2) evolution of chip, the plastic part of the microdeformation tensor; and (3) evolution of [overline [bold [del]]]chip, the covariant derivative of chip. A semi-implicit time integration of the stress and plastic evolution equations is outlined after assuming small elastic deformations and Cartesian coordinates for the current configuration. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Finite strain micromorphic pressure-sensitive plasticity [texte imprimé] / R. A. Regueiro, Auteur . - pp. 178-191. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N°3 (Mars 2009) . - pp. 178-191 Mots-clés : Plasticity Strain Pressure Thermodynamics Microstructure. Résumé : A finite strain micromorphic pressure-sensitive plasticity model is formulated starting with thermodynamically conjugate stresses and plastic deformation rates in the reduced dissipation inequality, written in the intermediate configuration. Isotropic linear elasticity and nonassociative Drucker–Prager plasticity with cohesion hardening/softening are assumed for the constitutive equations. The reduced dissipation inequality dictates three levels of plastic evolution: (1) evolution of Fp, the plastic part of the deformation gradient; (2) evolution of chip, the plastic part of the microdeformation tensor; and (3) evolution of [overline [bold [del]]]chip, the covariant derivative of chip. A semi-implicit time integration of the stress and plastic evolution equations is outlined after assuming small elastic deformations and Cartesian coordinates for the current configuration. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]

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