Materials physics and chemical physics
Relationships between metal origins, microstructure, behaviour in forming, defects and final properties. Cold, warm and hot processing. Behaviour coupled with structural evolutions when damaged, microstructural analyses, thermo-mechanic tests, multi-level DigiMicro models.
Experimental studies and modelling of the origins of solidification structures of metals and polymer crystallisation in industrial processing (e.g. smelting, continuous casting, atomisation and injection moulding).
Links between the structure formed from a liquid state and its previous processing.
Objectives: identify the data necessary for mastering the use of material.
Physics, chemical physics and processing of solutions, suspensions, blends, gels and other complex structures based on synthetic and biomass-based polymers.
Physics, chemical physics and processing of polysaccharides.
Rheology and understanding of the influence of complex flows on the morphological organisation. Development of rheo-optical tools.
Friction, wear, surfaces
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.
Computational mechanics and physics, Thermomechanics, Numerical simulation
Behaviour of molten polymers and complex fluids (flow instabilities, flow in transparent dies), study of solid polymers (behaviour patterns, end use properties, damage models), experimental approach and modelling of polymer processing (extrusion, injection, coextrusion, calendering, film procesing, etc.).
>> More details on Biomass-Based Polymer Science and Engineering Studies: Presentation .pdf
>> document presenting our polymer processing plateform : Presentation .pdf
( This document presents CEMEF research activities, skills and tools in the field of polymer processing, from gram to kilogram scale. )
Physical modelling and experimental characterisation of mechanical behaviour and end use properties of polymer based materials.
Constitutive modelling of mechanical behaviour of solid and rubbery polymers.
End use properties as a function of processing.
Strain induced crystallisation and polymers stretching.
Stretch blow moulding, thermoforming, stretching.
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).
Study and development of reliable and efficient numerical methods for modelling using finite elements, the identification of parameters and optimisation; multigrid methods; non-linear problems in solid mechanics (heterogeneous structures, assemblies, contact, damage, tear, localisation problems, hyperelasticity, etc.); multi-physical coupling (thermics, electromagnetism, chemistry, etc.); biomechanics.
Advanced computing
Numerical simulation in material forming: forging, injection, extrusion, mixing. Numerical methods: finite elements, parallel computing, meshing and mesh adaptation, and optimisation. Large deformation, free surfaces, interface, multiphase, fluid structure coupling.
Complex fluids: fillers, orientation, and viscoelasticity
