Use of spherical indentation data changes to materials characterization based on a new multiple cyclic loading protocol

Jean-Marc Collin (1) , Gérard Mauvoisin (1) , Philippe Pilvin (2) , Rochdi El Abdi (1)

1 LARMAUR - LAboratoire de Recherche en Mécanique Appliquée
2 LG2M - Laboratoire de Génie Mécanique et Matériaux

An interpretation of spherical indentation experiments and the determination of hardening law parameters is the challenge in this paper. A new protocol based on multiple cyclic loading allowed models describing the indentation data changes to be determined from a numerical study. Inversion of these models, determined for two constitutive equations with isotropic hardening, combined with a sensitivity study enabled the study of the uniqueness of the solution. It is shown that although the new protocol is not necessary to determine the two Hollomon equation parameters, it is necessary to determine accurate values of the three Ludwig equation parameters. From an experimental study, it was shown that methods based on a “reverse” analysis can be used in order to have an evaluation of the mechanical properties in a first-order approximation.

Mots clés: Multiple cyclic loading; Materials characterization; Spherical indentation

Domaines: Mécanique [physics.med-ph]; Matériaux

Jean-Marc Collin, Gérard Mauvoisin, Philippe Pilvin, Rochdi El Abdi. Use of spherical indentation data changes to materials characterization based on a new multiple cyclic loading protocol. Materials Science and Engineering: A, 2008, 488, pp.602-622. ⟨10.1016/j.msea.2008.01.041⟩. ⟨hal-01007414⟩