Abstract
This chapter is concerned with the behaviour of polar ice on geophysical time scales and its analysis by applying a micro-mechanical approach. Based on some assumptions regarding the anisotropic properties of an individual ice crystal and its microscopic deformation, frame-indifferent constitutive laws for creep response of the crystal are formulated. By applying homogenization methods, the microscopic laws are then used to derive the macroscopic constitutive relations for polycrystalline ice. These relations are employed to simulate the creep behaviour of ice in simple flow configurations in order to correlate parameters in the macroscopic flow laws with the observed anisotropic behaviour of polar ice. The chapter concludes with the analysis of the mechanism of dynamic (migration) recrystallization of polycrystalline ice. Three alternative dynamic recrystallization models are formulated, which are subsequently used in the simulations for simple flows to investigate the effect of the recrystallization process on the evolution of macroscopic viscosities of ice.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
