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Research Topics

• MECHANICS OF GENERALIZED CONTINUA : Cosserat, Second Grade, Micromorphic
• CRYSTAL PLASTICITY : Single Crystal, Polycrystal
• HOMOGENIZATION : Computational Homogenization Methods, Size of Representative Volume Element
• STRAIN LOCALIZATION PHENOMENA : Kink Bands, Slip Band Propagation, Deformation Twinning, Crack Tip, Regularization
• METALLIC FOAMS : Aluminium, Nickel
• MICROSTRUCTURAL MECHANICS : 2D Microstructures, 3D Microstructures

Cosserat continuum

Kinematics, statics

Homogenization of Cosserat media

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Second Grade Medium

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Crystal Plasticity

Constitutive equations : Mandel, Cosserat

Single crystal Ni-based superalloys : microstructure, periodic homogenization 1, periodic homogenization 2,

Polycrystal : torsion of copper wires

Grain size effect : internal length, lattice curvature near grain boundaries, Hall-Petch

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Deformation Twinning

Twinning and untwinning of a single crystal

Twinning at a crack tip

Twin network in a coating

Hysteresis and constitutive equations

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Microstructural mechanics

Objectives, methods

2D microstructures : coatings, multicrystals

3D microstructures : foams, tomography confocal microscopy polycrystals random models

3D finite element computations : parallel computing 1, parallel computing 2, parallel machine, two-phase materials

Polycrystals : RVE, intergranular damage, intergranular diffusion

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