Job : Research engineer
Academic level : PhD degree
Location: LEM, Châtillon
ONERA, a major player in aerospace research, employs around 2,000 people. Placed under the tutelage of the Ministry of Defense, it has a budget of 230 million euros, more than half of which comes from commercial contracts. State expert, ONERA prepares the defense of tomorrow, meets the aeronautics and space challenges of the future, and contributes to the competitiveness of the aerospace industry. ONERA masters all disciplines and technologies of the field. All the major civil and military aerospace programs in France and in Europe carry a part of ONERA’s DNA.
The Materials and Structures Department is involved in the development of new materials. By integrating all the stages (development, characterization, dimensioning), the characteristic time of development of a new class of materials is measured in tens of years. The developments observed today in the field of modeling and the increase of the computational capabilities should allow decreasing this delay by a factor 2 or 3. It is in this context that ONERA develops a strategic axis “Digital material” to deploy a digital modeling software suite. This suite aims to establish the link between chemistry, microstructures and properties to eventually replace many experimental campaigns by arbitrary virtual sample simulations.
The models concerned are obviously multiphysics (thermodynamics, mechanics, damage) and call for a sequential multi-scale approach because of the huge gap between the space and time scales that separate the basic laws of physics and dimensions and lifetime of an aeronautical part. The challenge is to master the transfer of information between the different scales in order to consolidate the quantitative and predictive nature of the approach.
Within the Laboratoire d’Etude des Microsctructures, ONERA-CNRS Joint Research Unit integrated into ONERA’s Materials and Structures Department, you are in charge of research activities in the field of mesoscopic modeling of material microstructures. This includes the development of continuous multiphysics methods to model the microstructural evolution of materials and the impact of these microstructures on macroscopic properties (mechanical behavior, lifetime). It will involve implementing different theories (phase field methods, continuous mechanics, discrete and continuous plasticity, damage) in a coarse-graining spirit (discrete-continuous transition and meso-macro upscaling). You will also develop interactions with academic partners in the relevant fields.
The Ph.D. candidate must have an expertise in material physics and numerical modeling at different scales. A solid knowledge of statistical physics, out of equilibrium thermodynamics and solids mechanics, at discrete and continuous scales, is important. The practice of English is essential.
Please send your application (CV and cover letter) to: Alphonse.Finel@onera.fr