LEM3

UMR CNRS 7239
UdL
CNRS
ENSAM

                               
8 Research teams
On a local scale

LEM3 is part of the GI2M federation (Industrial, Mechanical, Materials Engineering). With technological platforms shared between laboratories, for research projects with local and regional industry (Greater Region, which includes regions of Germany, Belgium, France and Luxemburg), LEM3 has become a cornerstone of (PM)² (Centre for Processes, Mechanics and Materials).
LEM3 has a role in the CPER (State-Region Project Contracts) through three MEPP (Materials, Energy, Processes, Produce) actions: Machining processes, Formatting and Smart materials..
Our relations with the UMI CNRS 2958 / GeorgiaTech-Lorraine research laboratory are very good; 3 of our LEM3 researchers are UMI associate researchers and 1 UMI researchers is a LEM3 associate researcher (further associations are in progress).

On a regional scale

LEM3 is part of the Université de Lorraine’s (UdL) Materials-Matter-Metallurgy-Mechanics (M4) scientific center.
The laboratory belongs to the region’s competitive center Matélaria, as some of the laboratory’s research actions are often approved by that center. We are especially active in IRT M2P (Materials, Metallurgy, Processes), which has been recently granted. Several LEM3 researchers have taken part in the creation of the file (E. Patoor is the coordinator of the ‘Mise en forme – usinage’ program). Important contributions are also planned in 3 other programs: ‘Conception et simulation’, ‘Assemblage’ and ‘Caractérisation de matériaux’.

Labex DAMAS

The creation of the ‘DAMAS’ (Design of Alloy Metals for low-mAss Structures) excellence laboratory was approved in 2012, as part of the ‘Grand Emprunt’ campaign by the French State. The labex DAMAS is composed of LEM3 laboratories (Metz) and IJL (Institut Jean Lamour, Nancy) metallurgists.
A 7.5M EUR financial support is granted for 10 years.
Professor Laszlo Toth is the carrier of labex DAMAS.

DAMAS

http://www.enseignementsup-recherche.gouv.fr/cid59337/71-laureats-pour-la-vague-2-de-l-appel-a-projets-labex.html

On a national scale

The laboratory is part of the Institut Carnot-Arts, which has been recently renovated for 5 years (2011-2014). LEM3 is also present in several ANR projects (11 in total).
On an international scale, the laboratory maintains scientific relations with 60 laboratories in the world, see full list.

8 Research teams (January 2017)

Eight research teams, experts in experimental characterization and numerical modelling of mechanical behavior and structural changes, are studying materials at various levels: ranging from the nanostructure level to the manufacturing processes and structure level, passing by the texture and microstructure level.

  • 3TAM: Transformation, Textures, Topologie et Anisotropie des Matériaux
    3TAM team studies microstructures (with their 3D topology) and crystallographic textures (at micro- and macro-scales) of polycrystalline materials, with focus on changes induced by phase transitions during thermal, mechanical and/or physical processing, to better understand how the changes alter materials' macroscopic behaviour, especially their anisotropy.
  • APLI: Auto-organisation, Plasticité et Longueurs Internes
    The APLI team focuses on the inhomogeneity of spatial distributions and the self-organisation of microstructural defects (dislocations, point defects, twins, etc.) during plastic deformation of crystalline materials, and on the influence of these collective phenomena on the mechanical properties of materials.
  • BPS: Equipe de mécanique, Biomécanique, Polymère, Structures
    L’équipe BPS réalise des travaux de recherches à caractère fondamental et appliqué au traitement de problèmes industriels. L’équipe entend maintenir l'excellence de ses travaux scientifiques et leur ancrage dans la vie économique dans les domaines de la mécanique des matériaux et des structures (fiabilité, endommagement, rupture) ; du comportement dynamique des matériaux et des structures (loi de comportement, endommagement, rupture) ; des interactions dynamiques (tribologie, frottement, vibrations) ; des matériaux composites à base polymère (éco-polymère, fibres végétales) ; du comportement des tissus vivants (comportement de l'os, remodelage, systèmes prothétiques, ...).
  • CeDyn: Equipe Dynamique et Conditions extrêmes
    The research group CeDyn is involved in the description, under extreme conditions, of the mechanical behavior of materials at different scales. Theoretical, numerical and experimental approaches encompass various topics such as: high strain rate loading, dynamic damage and friction, thermo-mechanical coupling, rapid metal forming processes, impact and shock waves. Those works enable to describe the mechanical response of materials in service up to fracture.
  • MeNu: Mecanique Numérique
    The key issues addressed by the research group are numerical methods for non-linear boundary value problems with applications to manufacturing processes, vibration and geomechanics. Original results have been found about damping and vibration of composite structures, instabilities in soils, in sheet metal forming and thin-walled structures, bifurcation analysis, multiscale simulations and behavior of clays.
  • SIP: Surface, Interfaces et Procédés
    The team is developing thermo-mechanical experimental and modeling approaches of cutting, micro-cutting, machining processes, micro-machining, and joining (friction stir welding). The interest is focused on contact phenomena at tool-chip and tool-workpiece interfaces, tool wear and machined surface integrity. Machinability and micro-machinability of materials (high strength alloys, biomedical materials, nano-structured materials) are studied. The research works are carried out with the support of the experimental machining platform "usinov."
  • SMART: Systèmes Multiphasés, Applications, Rhéologie, Tenue en service
    SMART team’s objectives are related with microstructure analysis and behavior modeling in multiphase materials. i.e. Martensitic transformation in steels, shape memory alloys and titanium-based alloys ; Damage mechanisms and fracture in metals and composite materials. Its main applications fields are transportation and biomedical implants.
  • TMP: Textures, Microstructures et Procédés
    The main objectives of the TMP research team is to understand and to model the evolution of the microstructure associated with metal forming processes and to find the best conditions for generating the optimal textures and microstructures to satisfy the in-service requirements.