Monitoring Ductile Fracture Using Full Field

il y a 1 mois

GifsurYvette, France CEA Temps plein

Position description

**Category**:

- Engineering science

**Contract**:

- Internship

**Job title**:

- Monitoring Ductile Fracture Using Full Field Measurement Techniques to Build a Testing Database H/F

**Subject**:

- This internship focuses on using advanced full-field measurement techniques to monitor both material deformation and crack growth on test specimens, with the goal of building a reliable testing database for characterization of ductile fracture. A key aspect of the project is quantifying uncertainties, particularly those caused by measurement noise.

**Contract duration (months)**:

- 6

**Job description**:

- This internship focuses on using advanced full-field measurement techniques to monitor both
material deformation and crack growth on test specimens, with the goal of building a reliable
testing database for characterization of ductile fracture. A key aspect of the project is quantifying uncertainties, particularly those caused by measurement noise. During this internship you will:
- Perform full-field measurements on test specimens using with Digital Image Correlation (DIC) to capture real-time, high-resolution data on both deformation and crack propagation across the entire surface of the specimen ;
- Extract displacements maps across the specimen surface to derivate strain maps and crack growth ;
- Focus on managing uncertainties in the data. You will learn techniques to reduce the influence of measurement noise, ensuring the resulting database is as reliable and accurate as possible. This will include understanding the sources of noise, such as equipment limitations, and how to mitigate them ;
- Work with data processing tools to filter, refine, and validate the experimental data, ensuring that the final database reflects the true behavior of the material.
- This internship is a spin-off of the ESCALE project which aims to build a software sharepoint
for material testing based on full field measurements.- Note that a PhD thesis on an material characterization based on the produced data is scheduled as a continuation of this internship.Position location

**Site**:

- Saclay

**Job location**:

- France, Ile-de-France, Essonne (91)

**Location**:

- Gif Sur Yvette

**Languages**:

- English (Intermediate)

**Prepared diploma**:

- Bac+5 - Master 2

**Recommended training**:

- Université, Ecole d'ingénieurs

**PhD opportunity**:

- Oui

Requester

**Position start date**:

- 03/03/2025

General information

**Organisation**:
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas:

- defence and security,
- nuclear energy (fission and fusion),
- technological research for industry,
- fundamental research in the physical sciences and life sciences.

Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.

The CEA is established in ten centers spread throughout France

**Reference **:2024-34413**Description de l'unité**:

- Le DM2S (Département de Modélisation des Systèmes et des Structures) développe des outils de simulation pour la conception et l'évaluation de systèmes dans les disciplines de base de l'énergie, i.e. thermomécanique, thermohydraulique et neutronique, toutes filières confondues. Il s'appuie pour cela sur des essais et des plateformes logicielles, développées en interne ou en partenariat.

Le SEMT (Service d'Études Mécaniques et Thermiques), doté de 2 plateformes d'essai et d'outils de simulation qu'il développe (MANTA, EUROPLEXUS, CAST3M), est l'unité de compétence de la DES en mécanique, thermique, et interaction fluide-structure. Il participe aux projets du CEA, dont un grand nombre en coopération avec EDF, FRAMATOME, IRSN, ainsi qu'à des programmes de recherche nationaux et européens.

Au sein du SEMT, le Laboratoire d'Études de Dynamique (DYN) est en charge d'actions d'études et de recherche dans les domaines de la dynamique des structures, en interaction éventuelle avec les fluides : vibrations, vibrations sous écoulement, et dynamique rapide. Un des atouts du laboratoire est de disposer de compétences et de moyens couvrant la modélisation physique, la simulation numérique et les essais (analytiques ou de validation) sur ses installations propres (plateforme RESEDA), en lien avec les activités industrielles de ses partenaires historiques (EDF et FRAMATOME).

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