D. Tabor, The hardness of metals, 1951.

M. Dao, N. Chollacoop, K. J. Van-vliet, T. A. Venkatseh, and S. Suresh, Computational modeling of the forward and reverse problems in instrumented sharp indentation, Acta Materialia, vol.49, issue.19, pp.3899-3918, 2001.
DOI : 10.1016/S1359-6454(01)00295-6

Y. Cao and N. Huber, Further investigation on the definition of the representative strain in conical indentation, Journal of Materials Research, vol.21, issue.07, pp.1810-1821, 2006.
DOI : 10.1016/j.actamat.2003.11.001

J. M. Antunes, J. V. Fernandes, L. F. Menezes, and B. M. Chaparro, A new approach for reverse analyses in depth-sensing indentation using numerical simulation, Acta Materialia, vol.55, issue.1, pp.69-81, 2007.
DOI : 10.1016/j.actamat.2006.08.019

N. Ogasawara, N. Chiba, and X. Chen, Representative Strain of Indentation Analysis, Journal of Materials Research, vol.70, issue.08, pp.2225-2234, 2005.
DOI : 10.1016/S1359-6454(03)00186-1

J. L. Bucaille, S. Stauss, E. Felder, and J. Michler, Determination of plastic properties of metals by instrumented indentation using different sharp indenters, Acta Materialia, vol.51, issue.6, pp.1663-1678, 2003.
DOI : 10.1016/S1359-6454(02)00568-2
URL : https://hal.archives-ouvertes.fr/hal-00613073

J. H. Ahn and D. Kwon, Derivation of plastic stress???strain relationship from ball indentations: Examination of strain definition and pileup effect, Journal of Materials Research, vol.436, issue.11, pp.3170-3178, 2001.
DOI : 10.1016/0956-7151(93)90122-9

H. Lee, J. H. Lee, G. M. Pharr, and J. Mec, A numerical approach to spherical indentation techniques for material property evaluation, Journal of the Mechanics and Physics of Solids, vol.53, issue.9, pp.2037-2069, 2005.
DOI : 10.1016/j.jmps.2005.04.007

Y. P. Cao and J. Lu, A new method to extract the plastic properties of metal materials from an instrumented spherical indentation loading curve, Acta Materialia, vol.52, issue.13, pp.4023-4032, 2004.
DOI : 10.1016/j.actamat.2004.05.018

M. Zhao, N. Ogasawara, N. Chiba, and X. Chen, A new approach to measure the elastic???plastic properties of bulk materials using spherical indentation, Acta Materialia, vol.54, issue.1, pp.23-32, 2006.
DOI : 10.1016/j.actamat.2005.08.020

J. H. Lee, T. Kim, and H. Lee, A study on robust indentation techniques to evaluate elastic???plastic properties of metals, International Journal of Solids and Structures, vol.47, issue.5, pp.647-664, 2010.
DOI : 10.1016/j.ijsolstr.2009.11.003

N. Ogasawara, N. Chiba, and X. Chen, A simple framework of spherical indentation for measuring elastoplastic properties, Mechanics of Materials, vol.41, issue.9, pp.1025-1033, 2009.
DOI : 10.1016/j.mechmat.2009.04.010

G. Kermouche, J. Loubet, and J. Bergheau, Extraction of stress???strain curves of elastic???viscoplastic solids using conical/pyramidal indentation testing with application to polymers, Mechanics of Materials, vol.40, issue.4-5, pp.271-283, 2008.
DOI : 10.1016/j.mechmat.2007.08.003

M. Mata, M. Anglada, and J. Alcala, Contact Deformation Regimes Around Sharp Indentations and the Concept of the Characteristic Strain, Journal of Materials Research, vol.17, issue.05, pp.964-976, 2002.
DOI : 10.1098/rspa.1999.0423

L. E. Samuels and T. O. Mulhearn, An experimental investigation of the deformed zone associated with indentation hardness impressions, Journal of the Mechanics and Physics of Solids, vol.5, issue.2, pp.125-134, 1957.
DOI : 10.1016/0022-5096(57)90056-X

M. M. Chaudhri, Subsurface strain distribution around Vickers hardness indentations in annealed polycrystalline copper, Acta Materialia, vol.46, issue.9, pp.3047-3056, 1998.
DOI : 10.1016/S1359-6454(98)00010-X

M. M. Chaudhri, Strain Hardening around Spherical Indentations, physica status solidi (a), vol.455, issue.2, pp.641-652, 2000.
DOI : 10.1002/1521-396X(200012)182:2<641::AID-PSSA641>3.0.CO;2-U

K. L. Johnson, Contacts Mechanics, 1985.

O. Bartier and X. Hernot, Phenomenological study of parabolic and spherical indentation of elastic-ideally plastic material, International Journal of Solids and Structures, vol.49, issue.14, pp.2015-2026, 2012.
DOI : 10.1016/j.ijsolstr.2012.04.005
URL : https://hal.archives-ouvertes.fr/hal-00861520

M. Mata and J. Alcala, The role of friction on sharp indentation, Journal of the Mechanics and Physics of Solids, vol.52, issue.1, pp.145-165, 2004.
DOI : 10.1016/S0022-5096(03)00075-9

J. M. Antunes, L. F. Menezes, and J. V. Fernandes, Three-dimensional numerical simulation of Vickers indentation tests, International Journal of Solids and Structures, vol.43, issue.3-4, pp.784-806, 2006.
DOI : 10.1016/j.ijsolstr.2005.02.048