Micromechanics model of ice fields-I: Microscale constitutive laws

Research output: Contribution to journalArticlepeer-review

Abstract

The mechanics of ice fields, in order to be well analyzed, requires a realistic model admitting the intrinsic, microstructure of random physical and geometrical characteristics. When the field of pack ice possesses a single characteristic size at the microscale (scale of tens to hundreds of meters), a planar graph representation provides a convenient framework for the description of the ice field's micromechanics by the discrete fields of deformation and interaction force. A relationship between the latter two quantities specifies the microscale constitutive behavior of the particular ice field, and is taken here, in case of tightly packed ice, in the form of a linear elastic/viscoplastic law. Fanally, a statistical continuum model for finite motions of the ice field is derived as an equivalent approximation to the original graph-based random field model. Both these models provide a basis for further micro and macromechanical analyses to be reported in subsequent papers.

Original languageEnglish (US)
Pages (from-to)781-802
Number of pages22
JournalPure and Applied Geophysics PAGEOPH
Volume132
Issue number4
DOIs
StatePublished - Feb 1 1990
Externally publishedYes

Keywords

  • Ice field micromechanics
  • constitutive laws
  • discrete-continuum problem
  • microstructure

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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