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A new method to determine the true projected contact area using nanoindentation testing

Abstract : A new technique to determine the true projected contact area by nanoindentation is presented. It requires combining two models used normally to determine the representative stress and strain from nanoindentation parameters. Consequently, it does not require any model classically used to calculate the projected contact area. The method requires performing indentation on the same sample with two indenter tips with different geometries (Berkovich tip and a tetrahedral tip with a semi-angle equal to 50 degrees). The method was applied to three samples: glass, PMMA, and 100C6 steel. The projected contact area obtained by this model was accurate in all cases. (C) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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https://hal-emse.ccsd.cnrs.fr/emse-01500778
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Submitted on : Monday, April 3, 2017 - 4:32:29 PM
Last modification on : Wednesday, June 24, 2020 - 4:19:25 PM

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Gaylord Guillonneau, Guillaume Kermouche, Jean-Michel Bergheau, Jean-Luc Loubet. A new method to determine the true projected contact area using nanoindentation testing. Comptes Rendus Mécanique, Elsevier Masson, 2015, 343 (Issue : 7-8), pp. 410-418 ⟨10.1016/j.crme.2015.06.004⟩. ⟨emse-01500778⟩

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