Experimental data from creep tests on polycrystalline ice samples highlight not only the non-Newtonian behavior of ice but also suggest a critical dependence of the various rheological parameters upon the applied hydrostatic pressure.We propose a new modeling framework, based on implicit theories of continuum mechanics, that generalizes two well-known constitutive models by taking into account the effect of the pressure in the description of ice in creep. To ascertain the validity of the proposed models, we fit the physical parameters with experimental data for the elongational flow of ice samples. The results show good agreement with the experimental creep curves. In particular, the proposed generalized models reproduce the increase of the creep rate due to the presence of hydrostatic pressure.

Constitutive equations with pressure-dependent rheological parameters for describing ice creep / Arcangioli M.; Farina A.; Fusi L.; Saccomandi G.. - In: JOURNAL OF GLACIOLOGY. - ISSN 0022-1430. - STAMPA. - 65:(2019), pp. 557-564. [10.1017/jog.2019.31]

Constitutive equations with pressure-dependent rheological parameters for describing ice creep

Farina A.
Membro del Collaboration Group
;
Fusi L.;
2019

Abstract

Experimental data from creep tests on polycrystalline ice samples highlight not only the non-Newtonian behavior of ice but also suggest a critical dependence of the various rheological parameters upon the applied hydrostatic pressure.We propose a new modeling framework, based on implicit theories of continuum mechanics, that generalizes two well-known constitutive models by taking into account the effect of the pressure in the description of ice in creep. To ascertain the validity of the proposed models, we fit the physical parameters with experimental data for the elongational flow of ice samples. The results show good agreement with the experimental creep curves. In particular, the proposed generalized models reproduce the increase of the creep rate due to the presence of hydrostatic pressure.
2019
65
557
564
Goal 1: No poverty
Arcangioli M.; Farina A.; Fusi L.; Saccomandi G.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1176034
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