Organisation/Company: CNRS
Department: Laboratoire de Mécanique Paris-Saclay
Research Field: Physics
Researcher Profile: First Stage Researcher (R1)
Country: France
Application Deadline: 25 Nov 2024 - 23:59 (UTC)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 1 Jan 2025
Is the job funded through the EU Research Framework Programme? Not funded by a EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description The hired person will carry out research on the identification and experimental validation of constitutive models for architected materials. He/she will be part of the Eikology team at LMPS (University Paris-Saclay, CentraleSupélec, ENS-Paris-Saclay, CNRS) under the supervision of Dr. Clément Jailin and Prof. François Hild. He/she will also collaborate with Prof. Francisco Chinesta from the PIMM laboratory at ENSAM ParisTech.
The technical framework of the work will be the development of methods for identifying multiscale constitutive models. These models, derived from machine learning (the subject of another post-doctoral study), require the redesign of adapted and rapid acquisitions as well as rich measurement procedures. The use of 3D displacement field measurements acquired from X-ray tomography volumes provides the data necessary for the identification/experimental training of these models. Digital volume correlation (DVC) methods allow for fine spatial resolutions and the projected DVC (P-DVC) procedure can provide the temporal resolution.
The process will be carried out in several steps:
Conduct in-situ mechanical tests, using X-ray tomography, on architected materials to extract rich data necessary for learning purposes via DVC methods.
Identify/train the multiscale constitutive model.
Set up so-called "rapid" tests to gain temporal resolutions, using 4D augmented DVC (via P-DVC methods).
This work will require:
the implementation of in-situ experimental procedures in a lab tomograph,
the development of innovative full-field measurement techniques, which are guided by the model,
the establishment of a dialogue between images of the experiment, the full-field measurements and the constitutive model,
the writing of scientific articles,
the presentation of results during conferences or seminars (as part of national or international travels).
The hired person will be part of the ADAM (Accelerated Design of Architectural Materials) scheme, which is a national multidisciplinary project.
The Laboratory of Mechanics at Paris-Saclay (LMPS) is a research unit affiliated with the University of Paris-Saclay, CentraleSupélec, Ecole Normale Supérieure Paris-Saclay, and CNRS. It is dedicated to experiments, modeling, and simulation in solid mechanics. Among these different areas of expertise, the Laboratory is recognized for its work in experimental mechanics, with the originality of multiaxial aspects, hybrid control, and multimodal in situ 2D-3D-4D full-field measurements.
The Process and Engineering in Mechanics and Materials (Procédés et Ingénierie en Mécanique et Matériaux - PIMM) laboratory brings together a wide range of specialists ranging from the mechanics of materials and structures, metallurgy and polymer chemistry to advanced methods of numerical simulation. The PIMM laboratory recently developed a strong expertise in AI for engineering applications.
The required degree is a doctorate in mechanics, applied mathematics, or other related disciplines.
The hired person must have the following skills:
numerical simulation via finite elements
mechanical modeling
image processing
optimization algorithms
A plus would be the knowledge of machine learning, but it is not mandatory.
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