Overview of the CEMEF research teams

CMP : Computational Mechanics and Physics research unit  [ L. Fourment ]

> Computing and FLuids (CFL) - Elie Hachem

Numerical Methods & Applied Mathematics : Numerical Analysis, Stabilized FEM, Variational MultiScale …
Computational Fluid Dynamics : Incompressible , compressible , turbulent and multiphase flows
Coupled transport and structured flow problems : complex fluids, porous media, Darcy, heat and mass transfer…
Fluid Structure Interaction : Monolithic formulation, Immersed methods …
Mesh adaptation : Metric, mesher vs. Boundary layers, material discontinuities, shear banding
High Performance Computing : sustainable software management, automatic parallelization and partitioning, performance metrics

> Computational Solid Mechanics (CSM) - Katia Mocellin

"Etude et développement de méthodes numériques performantes pour la modélisation par éléments finis en mécanique des solides; méthodes multigrilles ; problèmes non linéaires (assemblages, contact, endommagement, rupture, problèmes de localisation, couplages multiphysiques, hyperélasticité,...)
Développement de méthodes d’identification de paramètres et d’optimisation couplées à la mise au point d’essais semi-industriels."

> MultiScale Modeling (MSM) - Marc Bernacki

Numerical Methods, Applied Mathematics, Mathematical Morphology, small-scale applications.
Development of numerical methods in order to generate virtual microstructures in a FE context thanks to experimental data.
Development of numerical methods dedicated to interfaces tracking problems at the microscopic scale ("full field approaches"): level set, phase and multi-phase field, stochastic approaches, discrete methods…
Development of the ad hoc meshing and remeshing tools and strategy. Use of full field approaches in order to build more accurate mean field models.
Development of multiscale approaches and integration of these approaches in simulations of manufacturing processes at the macroscale.

PAM : Metal Physics research unit [ G. Guillemot ]

> Metallurgy, Structure, Rheology (MSR) - Nathalie Bozzolo

Relationships between metal processing, microstructure, mechanical behavior in forming conditions, defects, and final properties.
Forming processes at room, medium or high temperatures.
Constitutive laws coupled to structural evolutions under large deformations, quantitative microstructure analysis, thermo-mechanical testing, multiscale models with software DigiMicro.

> Structure, Properties, Solidification (SP2) - Charles-Andé Gandin

Experimental and numerical studies of structure formation in solidification processing of alloys (e.g., casting, continuous casting, atomization, injection).
Links between structure formed from the liquid state and subsequence forming processing.
Goal : determination of the microstructural parameters influencing materials properties.

> ThermoMechanics and Plasticity (TMP) - Michel Bellet

Modelling using the finite elements method of the transformation of metallic alloys. Smelting, continuous casting, forming (embossing, hydroforming), welding and thermal treatments. Study of solid-liquid and thermal-mechanical-microstructure interactions and defect prediction (necking, hot tears). Theoretical analysis: anisotropic error estimators, Eulerian-Lagrangian methods, inverse analysis. Experimental pilot set-ups (hydroforming, vacuum gravity casting and arc-welding).

Polymers and Composites research unit [ Michel Vincent ]

The research unit Polymers and Composites brings together expertise in polymers at CEMEF, from formulation to end-use properties through processing and structures.  It is  constituted of the following three teams:

> BIO-based polymers and composites (BIO) - Tatiana Budtova

    • Cellulose and polysaccharide solutions;
    • Biomass-filled polymer and concrete composites
    • Polysaccharide-based aerogel
    • Biomass-based molten polymers, blends and suspensions


> Physical mechanics of Industrial Polymers (MPI) - Noëlle Billon

    • Mechanical properties of polymer based materials (solid and rubbery state) in relation to the processing,
    • Study of unmelted processes: stretch blow molding, thermoforming and stretching
    • Crystallization induced by deformation; Polymers texturation
    • Development of constitutive models for solid and rubbery polymers in relation to the processing

> Rheology, Microstructure, Processes (RMP) - Edith Peuvrel-Disdier

    • Rheophysics of polymers and suspensions
    • Crystallisation and structure development
    • Thermomechanics of polymer processing



Surfaces and Processes research unit [ Pierre Montmitonnet ]

> PSP - Pierre Montmitonnet

Contact mechanics, chemical physics of surfaces and interfaces. Development and modelling of friction, wear and adhesion tests; modelling and micro-macro numerical simulation of friction, abrasive wear and lubrification. Surface analysis, physico-chemical models, molecular modelling; reactivity of surfaces and interfaces, and applications to adhesion, sticking, tribochemistry and surface functionalisation.

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