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Stage Master 2 : Acquisition of kinematic fields H/F


Détail de l'offre

Informations générales

Entité de rattachement

Le Commissariat à l'énergie atomique et aux énergies alternatives (CEA) est un organisme public de recherche.

Acteur majeur de la recherche, du développement et de l'innovation, le CEA intervient dans le cadre de ses quatre missions :
. la défense et la sécurité
. l'énergie nucléaire (fission et fusion)
. la recherche technologique pour l'industrie
. la recherche fondamentale (sciences de la matière et sciences de la vie).

Avec ses 16000 salariés -techniciens, ingénieurs, chercheurs, et personnel en soutien à la recherche- le CEA participe à de nombreux projets de collaboration aux côtés de ses partenaires académiques et industriels.  

Référence

2019-10440  

Description du poste

Domaine

Mécanique et thermique

Contrat

Stage

Intitulé de l'offre

Stage Master 2 : Acquisition of kinematic fields H/F

Sujet de stage

Acquisition of kinematic fields for the assessment of 3D crystal plasticity numerical simulations

Durée du contrat (en mois)

6

Description de l'offre

The prediction of local stress heterogeneities is a key point in order to assess the brittle fracture prediction of reactor pressure vessels (RPV) steels from a multi-scale modelling, currently proposed through a dedicated crystal plasticity law. As the approach relies on local quantities, the simulation must be able to reproduce local quantities evaluated experimentally. The main goal of the proposal is then to assess the validity of the crystal plasticity law developed for BCC from a comparison between local strains measured from in-situ SEM Digital Image Correlation (DIC) and local strains simulated numerically.

 

The internship is a collaboration between MSSMat lab (CentraleSupelec) and the applied metallurgy research division of CEA Paris-Saclay. It will consist in both experimental developments aiming at optimizing the DIC treatment of in-situ tests (pattern, 3D displacement fields measurements, …), and 3D polycrystalline aggregates simulations using AMITEX_FFTP [2] code (massively parallel computations) in order to highlight relevant parameters and indicators allowing for comparison with experiments. The method will be developed and applied to pure iron polycrystals with equiaxed grains and the crystal plasticity law developed for BCC pure iron [1]. The main goal of the internship (and following PhD) is to take advantage of the recent developments in experimental methods and numerical simulations in order to push back the classical limitations of this approach (unknown effect of the underlying microstructure, limited size of simulated microstructures especially for 3D simulations etc…).

 

A preliminary literature review on modeling (crystal plasticity laws, intra- and inter-granular stresses, …) on the one hand, and local field measurements and in-situ micro-testing on the other hand, could make a corresponding M2 project and would be a good way for the candidate to get familiar with addressed topics.

 

A PhD is also proposed on the topic for a beginning in October 2020.

 

Références bibliographiques :

[1] G.Monnet, L. Vincent, L. Gélébart, Multiscale modeling of crystal plasticity in Reactor Pressure Vessel steels: Prediction of irradiation hardening, Journal of Nuclear Materials, Volume 514, 2019, Pages 128-138.

[2] http://www.maisondelasimulation.fr/projects/amitex/html/index.html

Moyens / Méthodes / Logiciels

fortran90, librairie MPI, matlab/octave/python, AMITEX

Profil du candidat

Bac +4/5
Ingénieur/Master

Localisation du poste

Site

Saclay

Localisation du poste

France

Critères candidat

Diplôme préparé

Bac+5 - Master 2

Formation recommandée

Mécanique

Possibilité de poursuite en thèse

Oui

Demandeur

Disponibilité du poste

01/10/2019