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Rayabilité des verres Silico-Sodo-Calciques

Abstract : This work deals with the scratch resistance of soda-lime silica (SLS) glasses with regard to environmental considerations, chemical composition of glass, load history, residual stresses and indenter geometry.
A detailed phenomenology investigation allows identifying the cracks and the damage regimes that occur during micro-scratching on the considered glasses. The influence of the chemical composition is discussed through structure considerations and fractographic observations at the micro-scale. The notion of densification/shear competition in the deformation process of these glasses (related to their normal/anomalous character) appears as the key factor in the understanding of their indentation/scratch behavior.
A mechanical modeling was considered to predict the damage which was identified during scratch experiments. The approach of Ahn* of an analytical solution of a scratch performed on a glass by a conical indenter (derived from Yoffe's° model for a static indentation) is extended to the present study. The development lies in two main extensions: i) the extension to the Vickers indenter geometry with the help of a 3D Finite Elements model of a Vickers static indentation, and ii) the extension to the SLS glass series by studying the densification/shear competition (experimental considerations conjugated to AFM measurements) that mainly control their indentation behavior.
The results of the model are correlated to the phenomenology results obtained by experimental observations. The scratch behavior of the different glasses with regard to their normal/anomalous character is also discriminated by the model.
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* Y Ahn, Deformation about sliding indentation in ceramics and its application to lapping. 1992, Perdue University: (USA).
° E.H. Yoffe, Elastic stress field caused by indenting brittle materials, Philosophical Magazine A, 46 (4), (1982), p. 617-628.
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https://tel.archives-ouvertes.fr/tel-00011224
Contributeur : Vincent Le Houerou <>
Soumis le : vendredi 16 décembre 2005 - 17:59:32
Dernière modification le : mercredi 16 mai 2018 - 11:23:20
Document(s) archivé(s) le : samedi 3 avril 2010 - 19:30:43

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  • HAL Id : tel-00011224, version 1

Citation

Vincent Le Houerou. Rayabilité des verres Silico-Sodo-Calciques. Mechanics [physics.med-ph]. Université Rennes 1, 2005. English. ⟨tel-00011224⟩

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