Constitutive modeling of the densification process in silica glass under hydrostatic compression

The mechanical response of amorphous silica (or silica glass) under hydrostatic compression for very high pressures up to 25GPa is modelled via an elastic–plastic constitutive equation (continuum mechanics framework). The material parameters appearing in the theory have been estimated from the ex si...

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Bibliographic Details
Published inActa materialia Vol. 62; pp. 250 - 257
Main Authors Keryvin, V., Meng, J.-X., Gicquel, S., Guin, J.-P., Charleux, L., Sanglebœuf, J.-C., Pilvin, P., Rouxel, T., Le Quilliec, G.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.01.2014
Elsevier
Subjects
Applied sciences
Condensed Matter
Densification
Exact sciences and technology
Materials Science
Metals. Metallurgy
Modeling
Physics
Silica glass
Very high pressure
Silica glass
Densification
Modeling
Very high pressure
Constitutive equation
Silica
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Summary:The mechanical response of amorphous silica (or silica glass) under hydrostatic compression for very high pressures up to 25GPa is modelled via an elastic–plastic constitutive equation (continuum mechanics framework). The material parameters appearing in the theory have been estimated from the ex situ experimental data of Rouxel et al. [Rouxel T, Ji H, Guin JP, Augereau F, Rufflé B. J Appl Phys 2010;107(9):094903]. The model is shown to capture the major features of the pressure–volume response changes from the in situ experimental work of Sato and Funamori [Sato T, Funamori N. Phys Rev Lett 2008;101:255502] and Wakabayashi et al. [Wakabayashi D, Funamori N, Sato T, Taniguchi T. Phys Rev B 2011;84(14):144103]. In particular, the saturation of densification, the increase in elasticity parameters (bulk, shear and Young’s moduli) and Poisson’s ratio are found to be key parameters of the model.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2013.07.067