1303.6693 (V. Keryvin et al.)

Constitutive modelling of the densification process in silica glass
under hydrostatic compression    [PDF]

V. Keryvin, J. -X. Meng, S. Gicquel, J. -P. Guin, L. Charleux, J. -C. Sanglebœuf, P. Pilvin, T. Rouxel, G. Le Quilliec

The mechanical response of amorphous silica (or silica glass) under hydrostatic compression for very high pressures up to 25 GPa 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 from Rouxel et al. [Rouxel T, Ji H, Guin JP, Augereau F, Ruffle B J Appl Phys 2010;107(9):094903]. The model is shown to capture the major features of the pressure-volume changes response from the in situ experimental work of Sato and Funamori [Sato T, Funamori N Phys Rev Lett 2008;101:255502]. In particular, the onset and saturation of densification, the increase in elasticity parameters (bulk, shear and Youngs moduli) and Poissons ratio are found to be key parameters of the model.

View original: http://arxiv.org/abs/1303.6693