Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Modeling of plasticity and ductile fracture physical mechanisms and numerical simulation of laboratory specimens

Abstract : The most commonly observed ductile fracture mechanism is void nucleation, growth and coalescence. Fully coupled "porous plasticity" models (GTN, Rousselier) are presented and their limits are discussed in relation with quantitative observations and micromechanical simulations. Strain localization in a macroscopic planar band represents the void coalescence phase. (Micromechanical modeling of nucleation is not presented.) These models are well suited for laboratory specimen calculations, including the multi-scale version with a reasonable computation time due to reduced texture identification (8 to 15 crystal orientations). A trans-granular crystallographic ductile fracture mechanism is also modeled in the multi-scale framework. Examples of numerical simulations are given for aluminum and steel specimens. The experimental and numerical results are in good agreement with regard to fracture strains and locations as well as macroscopic/microscopic features. The effect of the carbides-nucleated secondary population of voids in low alloyed steels is modeled in the multi-scale framework and used in calculations.
Type de document :
Communication dans un congrès
Liste complète des métadonnées

Littérature citée [22 références]  Voir  Masquer  Télécharger

https://hal-mines-paristech.archives-ouvertes.fr/hal-02401455
Contributeur : Gilles Rousselier <>
Soumis le : mardi 10 décembre 2019 - 07:36:11
Dernière modification le : jeudi 24 septembre 2020 - 18:30:08
Archivage à long terme le : : mercredi 11 mars 2020 - 13:44:22

Fichier

ROUSSELIER_articleCFM2019_Engl...
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-02401455, version 1

Citation

Gilles Rousselier. Modeling of plasticity and ductile fracture physical mechanisms and numerical simulation of laboratory specimens. 24ème Congrès Français de Mécanique, Aug 2019, Brest, France. ⟨hal-02401455⟩

Partager

Métriques

Consultations de la notice

56

Téléchargements de fichiers

45