A multiscale model based on intragranular microstructure - Prediction of dislocation patterns at the microscopic scale
Article dans une revue avec comité de lecture
Date
2007Journal
American Institute of Physics Conf. ProcRésumé
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.
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Article dans une revue avec comité de lectureFRANZ, Gérald; BEN ZINEB, Tarak; LEMOINE, Xavier; BERVEILLER, Marcel;
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 ... -
Article dans une revue avec comité de lectureFRANZ, Gérald; BEN ZINEB, Tarak; LEMOINE, Xavier; BERVEILLER, Marcel;
ABED-MERAIM, Farid (Elsevier, 2011)
In this paper, the effects of microstructure and deformation mechanisms on the ductility of multiphase steels are investigated. To this end, a formability criterion based on loss of ellipticity of the boundary value problem ... -
Communication avec acteFRANZ, Gérald; BEN ZINEB, Tarak; LEMOINE, Xavier; BERVEILLER, Marcel;
ABED-MERAIM, Farid (Curran Associates, Inc. / ICF, 2009)
In order to investigate the impact of microstructures and deformation mechanisms on the ductility of materials, the criterion based on bifurcation theory first proposed by Rice is applied to elastic-plastic tangent moduli ... -
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