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Titre du document / Document title

Transient plastic flow at nominally fixed structure due to load redistribution

Auteur(s) / Author(s)

WEI GAN (1) ; PEIHUI ZHANG (1) ; WAGONER Robert H. (1) ; DAEHN Glenn S. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Materials Science and Engineering, The Ohio State University, ETATS-UNIS

Résumé / Abstract

Transients in creep are of fundamental importance. They are commonly described either by a change in the isotropic strength of a material due to an increase in dislocation density or by a change in directional hardening, often described by a backstress. Here we look at transients as developed by load redistribution in Finite Element simulations. Two types of material models are used. The first contains grains with binary strength; the other uses grains with a continuous distribution of strengths. It was found that the load redistribution process is an important source in transient yielding and creep. An equivalent stress quantity to track the strength of a sample during deformation is proposed. Using this quantity a single load shedding curve can be obtained for both the tensile and creep tests. This unifies the material constitutive behavior for the very different boundary conditions seen in creep and constant-rate testing.

Revue / Journal Title

Zeitschrift für Metallkunde    ISSN  0044-3093   CODEN ZEMTAE 

Source / Source

2005, vol. 96, no6, pp. 572-577 [6 page(s) (article)] (54 ref.)

Langue / Language

Anglais
Revue : Allemand

Editeur / Publisher

Hanser, München, ALLEMAGNE  (1948-2006) (Revue)

Mots-clés anglais / English Keywords

Modeling

;

Finite element method

;

Heterogeneity

;

Creep

;

Mechanical properties

;

Plasticity

;

Plastic flow

;

Transients

;

Mots-clés français / French Keywords

Modélisation

;

Méthode élément fini

;

Hétérogénéité

;

Fluage

;

Propriété mécanique

;

Plasticité

;

Ecoulement plastique

;

Phénomène transitoire

;

Mots-clés espagnols / Spanish Keywords

Modelización

;

Método elemento finito

;

Heterogeneidad

;

Fluencia

;

Propiedad mecánica

;

Plasticidad

;

Flujo plástico

;

Fenómeno transitorio

;

Mots-clés d'auteur / Author Keywords

Creep

;

Load shedding

;

Heterogeneity

;

Transients

;

Finite element

;

Localisation / Location

INIST-CNRS, Cote INIST : 271, 35400013824751.0070

Nº notice refdoc (ud4) : 16906865



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