INTERNSHIP Engineer - Modeling of lubrication during aluminium rolling
France, Auvergne-Rhône-Alpes, Voreppe
November 28th, 2022
An intern (all genders) – 6 months
Engineer schools or masters - materials / mechanics
Period 6 months - Starting from March 2023
Project title: Modeling of lubrication during aluminium rolling
Constellium is a world leader in the development and manufacture of high value-added aluminum products and solutions for a wide range of markets and applications, focusing in particular on aerospace, automotive and packaging. Constellium also has nearly 12,000 employees worldwide. We are committed to minimizing the environmental impact of our operations and improving the life cycle footprint of aluminum throughout the value chain.
In our company, safety is essential, it is one of our core values without compromise. Our Research and Technology Center, C-TEC Constellium Technology Center, based in Grenoble (Voreppe – 38) employs about 240 people.
By joining our company, you will discover a multicultural company (over 20 nationalities) which is committed to diversity and the well-being of its employees.
Main goal: Improve the understanding of the lubrication and the prediction of friction coefficient in aluminum rolling, through a comprehensive work of modelling, from the physical phenomena to advanced numerical simulations.
Cold rolling of aluminum alloys is very dependent on friction and thus on lubrication. A Multiphysics model of friction coefficient was developed in the 90s. The internship, which a part of a global project including other companies through PhD positions, aims at improving this first model from a physics point of view. It is focused on the existing software: it requires to go deep in the physical phenomena and to improve the program coding from a speed and robustness point of view. This program will be the basis of a PhD position starting in 2023.
The current model couples many physics (non-linear solid mechanics, fluid mechanics, thermal transport, …) which are closely linked to one another. As a consequence, a robust mathematical coupling is mandatory in order to get an efficient software.
These couplings result in nested convergence loops, some of them being “stiff” ODEs (ordinary differential equations) which are very sensitive to the boundary conditions. The convergence is thus rather slow, and sometimes fails when the conditions are too difficult.
The proposed work consists: on the one hand, in mastering the physical phenomena (with a critical eye on the current model); on the other hand, in improving the numerical methods currently coded in the software.
This internship is done in collaboration with the research team PSF (Processes, Surfaces, Functionalities) from Ecole des Mines de Paris, CEMEF, Sophia Antipolis. The tutors will be Pierre Montmitonnet, Research Director at CNRS and Imène Lahouij, Assistant Professor at MINES Paris.
Education level: students engaged in their final year of master’s or mechanical engineer’s degree.
Competences, technical & soft skills requirement:
- Basics: Materials science, Physics, numerical methods
- A taste for programming. Experience with one of the following programming languages (C, C++, Fortran) is appreciated.
- Capacity for teamworking ; oral and written reporting.
- Languages: French or English, B2/C1 both oral and written