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Continuum-mechanical, Anisotropic Flow model for polar ice masses, based on an anisotropic Flow Enhancement factor

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Title: Continuum-mechanical, Anisotropic Flow model for polar ice masses, based on an anisotropic Flow Enhancement factor
Authors: Placidi, Luca Browse this author
Greve, Ralf Browse this author →KAKEN DB
Seddik, Hakime Browse this author
Faria, Sérgio H. Browse this author
Keywords: Continuum mechanics
Anisotropy
Ice
Mixtures
Recrystallization
Issue Date: Mar-2010
Publisher: Springer Berlin
Journal Title: Continuum Mechanics and Thermodynamics
Volume: 22
Issue: 3
Start Page: 221
End Page: 237
Publisher DOI: 10.1007/s00161-009-0126-0
Abstract: A complete theoretical presentation of the Continuum-mechanical, Anisotropic Flow model, based on an anisotropic Flow Enhancement factor (CAFFE model) is given. The CAFFE model is an application of the theory of mixtures with continuous diversity for the case of large polar ice masses in which induced anisotropy occurs. The anisotropic response of the polycrystalline ice is described by a generalization of Glen's flow law, based on a scalar anisotropic enhancement factor. The enhancement factor depends on the orientation mass density, which is closely related to the orientation distribution function and describes the distribution of grain orientations (fabric). Fabric evolution is governed by the orientation mass balance, which depends on four distinct effects, interpreted as local rigid body rotation, grain rotation, rotation recrystallization (polygonization) and grain boundary migration (migration recrystallization), respectively. It is proven that the flow law of the CAFFE model is truly anisotropic despite the collinearity between the stress deviator and stretching tensors.
Rights: http://creativecommons.org/licenses/by-nc/2.5/
Type: article
URI: http://hdl.handle.net/2115/42804
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Greve Ralf

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