Au cours des dernières décennies, le développement de tôles d'acier avancé à haute résistance (AAHR), destinées de l'industrie automobile, a permis d'atteindre des niveaux supérieurs de de résistance tout en maintenant une ductilité adéquate, et ce, à faibles coûts de fabrication.

Cependant, ces tôles d'aciers ont montré une tendance à basculer du mode de rupture ductile conventionnel, dominé par la coalescence de cavités, vers d'autres modes de rupture, tels que la localisation plastique macroscopique, voire même la fissuration fragile intergranulaire.

Motivée par les implications néfastes de telles transitions de mécanisme de rupture sur la formabilité et sur la résistance aux impacts, une vaste campagne d'essais mécaniques a été menée sur des tôles minces d'AAHR de troisième génération, dans le but d'induire des déformations, jusqu'à rupture, selon des modes de chargement variés.

Dans ce travail, plusieurs transitions de mode de rupture ont été observées :

(i) basculement d’un endommagement ductile à une localisation plastique en traction uniaxiale lorsque la température d'essai dépasse 100°C,

(ii) basculement d’un endommagement ductile à une rupture fragile de type quasi-clivage sous triaxialité de contrainte accrue, et

(iii) un mode de rupture inhabituel alternant entre des zones d’endommagement ductile et des zones de (quasi-)clivage fragile, organisées en un motif périodique de chevrons pointant dans la direction de fissuration.

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Jury members :

• Prof. Pascal Jacques (UCLouvain, Belgium), supervisor
• Prof. Aude Simar (UCLouvain, Belgium), chairperson
• Prof. Renaud Ronsse (UCLouvain, Belgium)
• Prof. Thomas Pardoen (UCLouvain, Belgium)
• Dr. Astrid Perlade (ArcelorMittal Global R&D)
• Prof. Aude Simar (UCLouvain, Belgium)
• Prof. Sébastien Allain (Mines Nancy, France)
• Prof. Daniel Casellas (Eurecat, Spain)

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Visio conference link :

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The wall-model is then used to perform a high-fidelity wmLES of a rectangular supersonic air ejector, using periodic boundary conditions in the spanwise direction. The results are compared to those obtained using a 2-D RANS simulation, and also to those obtained experimentally in a setup with transparent side-walls (also used for flow visualization). The structure of the mixing layers is analyzed and the postprocessing tools using total exergy fluxes are presented. The discrepancies between the RANS simulation and LES results are explained using an analysis of the turbulent fluctuating contributions for both frameworks: those being resolved in our LES; yet only modeled in RANS.

Finally, the design of a new cylindrical supersonic ejector experiment is presented; which is really the design used for industrial applications. The characteristic curves are obtained experimentally. They are also compared to those obtained using axisymmetric RANS simulations. It is found thatÌý such RANS simulations allow to predict quite well the global behavior of the ejector, in on- and off-design operations. We however observe large deviations between the experimental and numerical wall-pressure profiles. To gain additional insight into the flow physics, and also help explain the observed differences, a high-fidelity wmLES of the full ejector is performed for an operating point at the end of the on-design regime, just before the critical point. The results of this simulation are presented, and are also used to provide an explanation for the consistent underestimation of the wall-pressure profile in RANS simulations, using an extension of the compound-choking theory.

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Jury members :

• Prof. Yann BartosiewiczÌý (UCLouvain, Belgium), supervisor
• Prof. Grégoire Winckelmans (UCLouvain, Belgium), supervisor
• Prof. Hadrien Rattez (UCLouvain, Belgium), chairperson
• Dr. Matthieu Duponcheel (UCLouvain, Belgium)
• Dr. Koen Hillewaert (ULiège, Belgium)
• Prof. Stephan Hickel (TUDelft, Netherlands)

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Visio conference link:

The primary geological phenomena that impact our planet's surface are now elucidated in the context of plate tectonics. However, this planetary dynamic is not the norm when we examine the other terrestrial planets in our solar system. It is becoming increasingly evident that this is one of the prerequisites for the emergence of life on a planetary body. It is now understood that plate tectonics represents merely the surface manifestation of the extensive convection currents that stir the Earth's mantle, enabling the dissipation of its internal heat. A primary objective of geodynamics is to describe this convection. The crucial variable is the viscosity of the mantle rocks. In situ, these rocks are subjected to extreme pressure and temperature conditions, and only deform at exceedingly slow strain-rates. Despite notable advancements in recent years in replicating these conditions in the laboratory, they remain largely inaccessible to us. An alternative approach is to model the behavior of matter under these conditions. This is now feasible thanks to multiscale models that can describe the deformation mechanisms of mantle minerals at exceedingly high pressures, down to the atomic scale. In particular, we will present how the extremely low natural strain-rates compel us to conceptualize the mechanisms active in the mantle.

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Speaker :Ìý Patrick CORDIER, Université de Lille & Institut Universitaire de France, France

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As the energy transition continues, the electricity system will look fundamentally different in the years to come. With increasing generation from renewable energy sources and greater consumer participation, significant challenges arise for the design and operation of liberalized electricity systems. This workshop aims to bring together researchers in economics and operations research to discuss these challenges and explore innovative solutions.

Highlights:

10 Talks by International Guest Speakers

Date: 27 January 2025

Venue: Building Ommegang, Rue de l'Ommegang 6, 1000 Bruxelles. Directions and access instructions.

Organizers: Quentin Lété, Bert Willems

Confirmed Speakers:

• (DTU, Denmark)
• (NTUA, Greece)
• (IFN Stockholm, Sweden)
• (UJEP, Czech Republic)
• (ZEW, Germany)
• (ULB, Belgium)
• (VU Amsterdam, Netherlands)
• (CWI/TU Delft, Netherlands)
• (PSE, France)

Register for Attendance:

Also, don't miss our Interdisciplinary PhD Workshop on Energy Systems on January 28, 2025!

The joint CU.mil and MOBILLE conference for language teachers 2025.

Dates: 29-31 January 2025

Place: UCLouvain, Louvain-la-Neuve, Maison des Langues

ALL INFORMATIONÌý

GDR2025 Vision Forum

Louvain-la-Neuve, Belgique

January 30 (pm) and January 31 2025

GDR Vision Forum is a scientific event dedicated to vision researchers. It brings together psychophysicists, psychologists, neuroscientists and modellers to explore a variety of themes ranging from the perception of visual attributes (such as colour and movement) to decision-making processes, including multisensory integration and spatial representation.

Registration

Attendance at the conference is free, but registration is compulsory for organisational reasons. We encourage you to re-use one of your old badges to minimise waste.

. To take part in the social event, we ask you to contribute €25.

Closing date: January 20 2025

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The detailed program will be available here in January.

We are already delighted to announce our three keynote speakers:

University College London, United Kingdom

Queen Mary University of London, United Kingdom

, École Normale Supérieure, France

Abstract submission

Closing date : January 7, 2025 (midnight)

Submissions (for oral presentations or posters) will open at the end of November. Abstracts of no more than 250 words (preferably in English) may be submitted via this form below.

Option for two presentation formats (in English) :

• Oral presentation (10 minutes + 5 minutes for questions)
• Poster (format A0, in a portrait format) to be presented at a dedicated session on Friday 31 January 2025. You will be asked to leave your poster on display throughout the day. Panels (dimensions W = 1.20 m x H = 2 m) will be available from 8.30 a.m.

Social event @Musée L

A social event will be held on the evening of 30 January 2025 at ! Museum L is a Belgian museum belonging to and located in the . It is the first large-scale museum to bring together the heritage of a Belgian university and present it to the public. The building that the museum occupies is considered to be one of the highlights of Wallonia's contemporary heritage, a masterpiece of and one of the university town's most iconic and emblematic buildings.

For the meal, we will ask you to contribute €25.

Please confirm your participation when you register so that we can plan the number of participants.

Practical information Where:

You can find information about the city of Louvain-La-Neuve (hotels, visits,...) via the following link: LLN Tourist Office

Louvain-la-Neuve is Belgium's youngest city, a pedestrian-only university town, rich in culture with its famous museums, but also an oasis of greenery.

During your stay, discover places such as:

• le parcours Street Art ""

Located just a few kilometres from Louvain-la-Neuve, we suggest you also discover the following sites:

• Villers-la-Ville Abbey
• Tête Chargée micro-brewery
• and many more to discover on the Louvain-la-Neuve tourist office website. Several walking routes are available via the

On-campus accommodation

We advise you to book your accommodation quicklyÌýas on-campus accommodation is limited.

Here are a few addresses:

MOZAIK : cheap single or shared rooms. Please make your reservation by emailing info@gite-mozaik.beÌýwith the following details: Conference GDR2025, the date of your stay, and the reservation number 414.568.

• Hotel b-lodge : ; please mention ‘Conférence GDR2025’ when booking
• Hotel Ibis :
• Hotel Martin’s : Ìýcontact to book:Ìýcassandra.castrosanchez@martinshotels.comÌýorÌýaline.debuyser@martinshotels.comÌýorÌýsimon.mertes@martinshotels.com;ÌýPlease mention the code ‘GDR2025’ when booking
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Access

Access >How to get to Louvain-la-Neuve/Se rendre à Louvain-la-Neuve

By train : Consult the timetables on the . Make sure you select ‘Louvain-la-Neuve’, not ‘Louvain’, which is in Flemish Brabant, around twenty kilometres from our campus. Then, from Louvain-la-Neuve station to the campus
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Scientific Committee

Michael Andres*, Virginie Crollen*, Christel Devue^, Laurie Geers*, Valerie Goffaux*, Nicolas Masson*, Hans Op de Beeck#, Gilles Vannuscorps*.

*UCLouvain ;Ìý^ULiège ;Ìý#KULeuven

Organising Committee

Virginie Dasse, Mrittika Dey, Hélène Dumont, Sylvain Gérin, Marius Grandjean, Marie Houbben, Veena Kamble, Sarah Pereira Carneiro, Dominique Hougardy, Isabelle Legrain, Siegrid Vanderveken et Anaïs Thibaut

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Abstract submission

LLSMA2001 -ÌýEpistemology of Management – 5 ECTS

Prof. Matthieu de Nanteuil

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Description

See the full course description here

This courseÌýshould allow the students to access to a critical theory of knowledge applied to management and, in a wider sense, to all disciplines that belong to management studies. Such a goal is at the same time theoretical and practical: firstly, it should help students understand how a "management science" has been progressively invented, what are the challenges and limitations ofÌýsuch a project; secondly, it will introduce the participants to the main debates in the epistemological field, mixing fundamental and applied epistemologies; thirdly, it will give them reflexive roots to fulfill their research in management studies.

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ScheduleÌý

Exact schedule will be added soon

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Registration

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LLSMA2007 -ÌýCommunication and Writing Skills – 5 ECTS

Prof. Valérie SWAEN & Manuel KOLP

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Description

See the full course description here

COURSE OBJECTIVESÌý

The objective of the course is to help young researchers in management get a better understanding of the peer reviewed publication process and develop their academic writing skills. This course provides transversal competences to doctoral students and future researchers – i.e. competences that are useful regardless of their specific topic and discipline. During this seminar, students will learn how to write a literature review, an academic paper; how to get published and how to present a research paper.Ìý

At the end of the course, students should be able to:Ìý

• prepare a research plan and an academic paper;Ìý
• write a paper following the academic standards;Ìý
• review an academic paper;Ìý
• pitch his/her research;Ìý
• present a research seminar ;Ìý
• build online profiles and web presenceÌý

COURSE CONTENTÌý

The different topics that will be covered in this course are the following ones:Ìý

• Defining what makes a good research idea?Ìý
• Designing your literature review (Searching for literature; Quality of journals; Writing the literature review…)Ìý
• Developing your research design (Conceptual model, hypotheses, methodology…)Ìý
• Writing your paper: what and how? (Structure of an academic paper; Writing an abstract; Writing the basic sections: data collection, findings, discussion, conclusion, limitations and future research; Positioning a research and defining contributions; Common mistakes of novice writers…)Ìý
• Publishing process (Soliciting for feedback; Developing research papers; Selecting an appropriate journal; Order of authors; Making the paper ready for submission; …)Ìý
• Reviewing your paperÌý
• Presenting your research in a research seminarÌý
• Pitching your research to a non-expert audienceÌý
• Becoming an impactful academicÌý
• Using Web Tools and establishing web presence and visibilityÌý

COURSE ORGANIZATIONÌý

Students are expected to prepare the writing/reading assignment and think about the topics before each session. They are also expected to contribute in an informed, critical and innovative manner during the sessions.Ìý

EVALUATION METHODSÌý

Different assignments will be asked from students:Ìý

• writing a working paper following the academic standards (see specific guidelines posted on Moodle);Ìý
• presenting this working paper (see specific guidelines given in class);Ìý
• reviewing a paper written by another student and discussing it after the oral presentation/poster.Ìý

The assessment of your performance will be composed of the following elements:Ìý

• Quality of the written working paper (65%)Ìý
• Quality of the oral presentation of your working paper (20%)Ìý
• Quality of your review and discussion of a classmate paper (15%)Ìý

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ScheduleÌý

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AÌýpresentation dayÌýis organized in JuneÌý

Schedule to be confirmed.Ìý

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Registration

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