A uniform strain, discrete-grain model for evolving anisotropy of polycrystalline ice

• Autorzy: Staroszczyk R.
• Języki publikacji: EN

Abstrakty

EN

A discrete-grain model accounting for the induced anisotropy of polycrystalline ice is formulated. An individual ice crystal is supposed to be a transversely isotropic medium whose behaviour is linearly viscous. For such a crystal a frame-indifferent constitutive law involving three microscopic rheological parameters is derived. Assuming that each crystal undergoes a homogeneous deformation of the polycrystalline aggregate (the Taylor approximation), the macroscopic viscous behaviour of the material is determined. The considerations are illustrated by the results of numerical simulations of simple flows, showing the evolution of the oriented structure of the material and the variation of macroscopic viscosities with increasing strains. In addition, the influence of the parameters describing the single crystal anisotropy on the overall behaviour of the aggregate is investigated.

Słowa kluczowe

EN

polycrystalline ice; induced anisotropy; constitutive law

PL

lód polikrystaliczny; indukowana anizotropia; prawo konstytutywne

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2002
• Tom: Vol. 54, nr 2
• Strony: 103--126
• Opis fizyczny: Bibliogr. 32 poz.

Twórcy

autor

Staroszczyk R.

• School of Mathematics, University of East Anglia, Norwich NR 4 7TJ, United Kingdom,

Bibliografia

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