Open AccessModeling of deep indentation in brittle materials
Author(s) -
Nathalie Olivi-Tran,
Florence Despetis,
Annelise Faivre
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab7b29
Subject(s) - indentation , materials science , brittleness , contact mechanics , cone (formal languages) , composite material , stress (linguistics) , finite element method , structural engineering , mathematics , engineering , algorithm , linguistics , philosophy
We modelled deep indentation in brittle materials via a tensorial approach in three dimensions. Experimentally, we performed deep indentation in base catalyzed aerogels. When deep indentation is performed in these materials, it appears a Hertzian cone crack for both experimental and numerical results. The cone angle (angle between the surface and the boundaries of the Hertzian cone) depends on the material in which indentation is performed. The Young moduli of the materials has no effect on these angles. The tendency is that materials with increasing Poisson ratios have a decreasing value of the Hertzian cone angle.