A multiscale model based on intragranular microstructure - Prediction of dislocation patterns at the microscopic scale
Article dans une revue avec comité de lecture
Auteur
FRANZ, Gérald 
ABED-MERAIM, FaridBEN ZINEB, TarakLEMOINE, XavierBERVEILLER, MarcelRésumé
A large strain elastic-plastic single crystal constitutive law, based on dislocation annihilation and storage, is implemented in a new self-consistent scheme, leading to a multiscale model which achieves, for each grain, the calculation of plastic slip activity, with help of regularized formulation drawn from visco-plasticity, and dislocation microstructure evolution. This paper focuses on the relationship between the deformation history of a BCC grain and induced microstructure during monotonic and two-stage strain paths.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Documents liés
Visualiser des documents liés par titre, auteur, créateur et sujet.
-
Communication avec acte;ABED-MERAIM, Farid; ; ; (Association Française de Mécanique, 2007)
Deux modèles micromécaniques de comportement élastoplastique, développés en adoptant une formulation en transformations finies et couplés à une technique de transition d’échelle autocohérente, sont utilisés pour étudier ...
-
Communication sans acte;ABED-MERAIM, Farid; ; ; (Elsevier, 2007)
The development of a relevant constitutive model adapted to sheet metal forming simulations requires an accurate description of the most important sources of anisotropy, i.e. the slip processes, the intragranular substructure ...
-
Article dans une revue avec comité de lecture;ABED-MERAIM, Farid; ; ; ; (Elsevier, 2009)
In order to investigate the impact of microstructures and deformation mechanisms on the ductility of materials, the criterion first proposed by Rice is applied to elastic–plastic tangent moduli derived from a large strain ...
-
Communication avec acte;ABED-MERAIM, Farid; ; ; (2011)
In order to investigate the effects of microstructure and deformation mechanisms on the ductility of multiphase steels, a formability criterion based on loss of ellipticity of the boundary value problem is coupled with an ...
-
Article dans une revue avec comité de lecture;ABED-MERAIM, Farid; ; ; (Elsevier, 2009)
In order to analyze the formability of steels in sheet metal forming, a ductility loss criterion is coupled with a multiscale model. The behavior at the mesoscopic (grain) scale is modeled by a large strain micromechanical ...