KU Leuven

Micro-macro homogenization of mechanical parameters of porous material VAMOR DC5

2024-06-01 (Europe/Brussels)
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Over de werkgever

KU Leuven is an autonomous university. It was founded in 1425. It was born of and has grown within the Catholic tradition.

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In Le Man University the research will be hosted by the Laboratoire d’Acoustique de l’Université du Mans (LAUM), which is a Joint Research Unit of Le Mans University and CNRS (UMR 6613). The research carried out at LAUM concerns acoustics. Investigations at LAUM mainly focus on acoustic sources and sensors, wave propagation in fluids (at rest or in flow), wave propagation in solids (porous, granular or composite materials) and vibrating structures. The main objective is to understand the physical phenomena through both analytical developments and experimental studies associated with numerical simulations. LAUM counts around 150 academic and non-academic personnel.

In KUL the research will be hosted by the Mecha(tro)nic System Dynamics division (LMSD), which currently counts >100 researchers and is part of the department of mechanical engineering of KU Leuven. More information on the research group can be found on the website:
https://www.mech.kuleuven.be/en/research/mod/about and our linkedIn page:
https://www.linkedin.com/showcase/lmsd-kuleuven/.

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Project

This doctoral project is part of a larger, multidisciplinary and international project VAMOR: “Vibro-Acoustic Model Order Reduction” (GA 101119903) funded under the Marie-Sklodowska-Curie Actions Doctoral Networks within the Horizon Europe Programme of the European Commission.

VAMOR contributes to a more sustainable and quieter future for Europe. Noise pollution has arisen as one of the key factors towards the degradation of the quality of life in European societies. In that context, efficient physics-based sound modelling is a key enabler towards not only optimized and sustainable acoustic profiles through efficient design procedures, but also affordable so-called digital twins that monitor product performance in real time. To this end, the overarching goal of VAMOR is to provide high level scientific and transferable skills training on a new generation of efficient vibro-acoustic modelling techniques, so-called model order reduction (MOR) strategies, to a group of high achieving, competent doctoral candidates to promote a quieter and more sustainable environment. VAMOR brings together a remarkable consortium, which combines research leading academic institutions - KU Leuven, Technische Universitaet Munchen (TUM), Technical University of Denmark (DTU), Kungliga Tekniska Hoegskolan (KTH), Universite du Mans, Conservatoire National des Arts et Metiers (CNAM) - with a constantly innovating, wide variety of industrial partners working on software, material, testing, design and sound enhancement (Siemens Industry Software NV, Müller BBM, Trèves, Phononic Vibes, Saint-Gobain Ecophon, Tyréns, Purifi ApS).

As part of VAMOR, a joint Ph.D. position between LAUM and KUL is open to work on the topic of numerical modeling, design, manufacturing, and experimental validation of poroelastic materials. In that context:

  • different modeling and model reduction strategies will be investigated
  • potential optimization strategies will be investigated
  • prototypes will be designed and measured to validate the models
  • Ideal solutions need to be identified. 

In detail:

Poroelastic materials are used to mitigate both the acoustic and the elastic energies. This energy dissipation relies on visco-thermal and viscoelastic losses, which are inherent to the materials properties of the fluid and solid phases and to their microstructure. Relating the microstucture to the macroscopic behavior of poroelastic materials is therefore of primary importance to design poroelastic materials. Two-scale homogenization has been widely used to derive effective properties of such bi-phasic materials, principally when the skeleton is rigid. The present thesis aims at developing and promoting the two-scale homogenization of the entire poroelastic materials, that is to derive the effective properties of both the fluid and the solid phases from the microgeometry. This microgeometry will then be optimized, graded, or designed to exhibited new behavior in poroelastic materials. In that context, the candidate will use two-level model reduction techniques to reduce expensive numerical models. The first part of the work will consist in realizing a reduced model of an elementary cell by a condensation technique. This reduction will be done on the elementary beams of the elementary cell. A dispersion study will then be carried out to obtain the fundamental solutions (quasi-plane waves) propagating in the structure. An experimental validation phase, using existing test benches, will then be conducted on structures obtained by 3D printing. The second part will aim at setting up a reduced model for an assembly of many reduced elementary cells. Particularly Krylov recycling techniques will be considered. A dispersion study on the assembled structure will show if the reduced model modifies or not the wave properties of the material.

Main Supervision at LAUM: Prof. Jean-Philippe Groby will supervise the doctoral student.

Co-Supervision at KUL: Prof. Elke Deckers will co-supervise the doctoral student.

Profile

If you recognize yourself in the story below, then you have the profile that fits the project and the research group:

  • I have a master degree in acoustic, physics, mechanical engineering or mathematics.
  • I am proficient in written and spoken English.
  • I have not had residence or main activities in France for more than 12 months in the last 3 years.
  • During my courses or prior professional activities, I have gathered some experience with at least one of the following: principles of acoustics, numerical modeling techniques, or experimental methods in acoustics. I have a profound interest for these topics.
  • As a researcher I perform research in a structured and scientifically sound manner. I read technical papers, understand the nuances between different theories and implement and improve methodologies myself.
  • In frequent reporting, varying between weekly to monthly, I show the results that I have obtained and I give a well-founded interpretation of those results. I iterate on my work and my approach based on the feedback of my supervisors which steer the direction of my research.
  • It is important for me to work as an active team member and I am eager to share my results to in-spire and being inspired by my colleagues.
  • During my PhD, I want to grow towards following up the project that I am involved in and representing the research group on project meetings and conferences. I see these events as an occasion to disseminate my work to an audience of international experts and research colleagues, and to learn about the larger context of my research and the research project. 

Offer

  • The possibility to study in a dynamic and international research environment in collaboration with industries and prominent universities worldwide.
  • You will receive a monthly gross salary of 2812 € (about 2250 € net) + Mobility allowance: 600 € gross + Family allowance depending of the status: 660 € gross
  • A postgraduate education at an institution that is active and supportive in matters pertaining to working conditions, gender equality and diversity, and study environment.
  • Joint PhD between the University of Le Mans and KU Leuven.
  • Project part of the EU project VAMOR, and in close collaboration with the industry.
  • Ample occasions to develop yourself in a scientific and/or an industrial direction. Besides opportunities offered by the research group, further doctoral training for PhD candidates is provided in the framework of the KU Leuven Arenberg Doctoral School (https://set.kuleuven.be/phd), known for its strong focus on both future scientists and scientifically trained professionals who will valorize their doctoral expertise and competences in a non-aca-demic context. More information on the training opportunities can be found on the following link: https://set.ku-leuven.be/phd/dopl/whytraining.

LAUM Job Post

Interested?

We look forward to receiving your online application including a letter of motivation, CV, diplomas with transcripts and contact details of two referees. The PhD candidate will be selected in two stages: application file evaluation and at least 2 interviews.

Application must be made online via the Le Mans University recruitment portal (https://theses.doctorat-bretagneloire.fr/sis/campagne-2024/micro-macrohomogeneisation-des-parametr/++add++Candidate#autotoc-item-autotoc-0). The application form is available in French or English (click on "Switch to English" to fill in the form in English). Please note that the instructions and dates in the first menu are for French government doctoral scholarships and do not apply to MSCA DC applicants.

For more information please contact Mr. Dionysios Panagiotopoulos, tel.: +32 16 32 86 93, mail: dionysios.panagiotopoulos@kuleuven.be, Prof. dr. Elke Deckers, tel.: +32 16 37 26 79, mail: elke.deckers@kuleuven.be, Prof. Olivier Dazel (Olivier.Dazel@univ-lemans.fr), Prof. Mathieu Gaborit (Mathieu.Gaborit@univlemans.fr) or Prof. Jean-Philippe Groby (Jean-Philippe.Groby@univ-lemans.fr),

KU Leuven strives for an inclusive, respectful and socially safe environment. We embrace diversity among individuals and groups as an asset. Open dialogue and differences in perspective are essential for an ambitious research and educational environment. In our commitment to equal opportunity, we recognize the consequences of historical inequalities. We do not accept any form of discrimination based on, but not limited to, gender identity and expression, sexual orientation, age, ethnic or national background, skin colour, religious and philosophical diversity, neurodivergence, employment disability, health, or socioeconomic status. For questions about accessibility or support offered, we are happy to assist you at this email address.

Informatie over de vacature

Functienaam
Micro-macro homogenization of mechanical parameters of porous material VAMOR DC5
Werkgever
Locatie
Oude Markt 13 Leuven, België
Gepubliceerd
2024-05-15
Uiterste sollicitatiedatum
2024-06-01 23:59 (Europe/Brussels)
2024-06-01 23:59 (CET)
Soort functie
PhD
Baan opslaan

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Over de werkgever

KU Leuven is an autonomous university. It was founded in 1425. It was born of and has grown within the Catholic tradition.

De pagina van de werkgever bekijken

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