Abstract
An orthotropic constitutive model for the strain-induced anisotropy of polar ice is considered. The ice is modelled as a viscous and incompressible fluid with evolving fabric that depends on local deformations, and the viscous law expresses the stress in terms of the strain-rate, strain and three structure tensors based on the principal stretch axes. The model is first adopted to illustrate the evolution of the ice viscosities during continued uni-axial compression and simple shearing, and then it is applied to the simulations of a steady ice sheet flow. For a fixed free surface elevation, the accumulation rates required to maintain the prescribed geometry, as well as the velocity depth-profiles, are calculated and compared with those obtained for the isotropic ice.
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References
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© 1999 Springer-Verlag
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Staroszczyk, R., Morland, L.W. (1999). Orthotropic viscous model for ice. In: Hutter, K., Wang, Y., Beer, H. (eds) Advances in Cold-Region Thermal Engineering and Sciences. Lecture Notes in Physics, vol 533. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104187
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DOI: https://doi.org/10.1007/BFb0104187
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