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18ème Congrès Français de Mécanique (Grenoble 2007), Grenoble : France (2007)

Champ de pression non isotrope approchant le champ des contraintes d'indentation d'un verre

Manuel Buisson 1, J.C. Sangleboeuf 2, V. Keryvin 2, T. Rouxel 2

(2008)

Following Yoffe (1982) stress- and strain-fields due to glass indentation are related to « unorthodox » plasticity, that is to say non isovolumic irreversible strain. For such a densification process, her basic definition of an equivalent elastic truncated spherical inclusion uses non isotropic uniform pressures similar to the elastic-pseudoplastic field. Such a field is composed of a vertical pressure spreaded on a circular area and of a radial expansion pressure ; this field becomes an approximation of the elastic-densificating field expressed as the superposition of the Boussinesq (1885) field and a blister field. This equivalence between non isotropic but uniform elastic pressure field and elastic-densificating field is approximated via a truncated Fourier's serie ; our semi-analytical results try to be written explicitly with Poisson's coefficient and encourage to future experimental and theoretical developments.

1:	Institut de Recherche Mathématique de Rennes (IRMAR)
	CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne
2:	LAboratoire de Recherche en Mécanique Appliquée (LARMAUR)
	CNRS : FRE2717 – Université de Rennes 1

Subject

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Physics/Mechanics/Mechanics of the fluids Engineering Sciences/Mechanics/Fluids mechanics

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From: Maryse Collin <>

Submitted on: Monday, 30 November 2009 16:23:43

Updated on: Monday, 30 November 2009 16:23:43