Identification des paramètres d'une loi de comportement élastoplastique par indentation continue sphérique

The purpose of this work is to propose numerical and experimental studies of spherical instrumented indentation. The numerical study has allowed us to follow the evolution of data deduced from an indentation curve. Models for these data are proposed in the case of two behavior laws. They are the basis of the study of the uniqueness of the solution in the case of the spherical indentation. The experimental study has allowed us to evaluate the mechanical parameters of two behavior laws for four metallic samples. Mots-clefs : Indentation spherique ; energies d’indentation ; caracterisation des materiaux

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