Micromechanics model of ice fields-II: Monte Carlo simulation

Research output: Contribution to journalArticlepeer-review

Abstract

The graph model presented in Part I of this series provides the basis for development of a computer simulation of tightly packed ice fields taken as ensembles of square-shaped ice floes with random physical properties. A program based on an alternating-direction scheme is developed to model the time evolution of a field of ice floes in a rectangular domain. The simulation of a field in an Arctic channel shows that there is a strong tendency for an earlier onset of microscale plastic flows and formation of irregular clusters of ice floes and openings in a field with spatially random properties versus a field with deterministic spatially homogeneous properties. A special study is conducted of an elastic-plastic transition in a field of 101×101 floes. The transition to macroscopically plastic flow is possible only with a percolation of inelastic regions through the entire domain of the ice field. The fact that this percolation is characterized by a noninteger fractal dimension uncovers a (possibly principal) generation mechanism of ice field morphologies, and points to scale dependence in mechanics of ice fields for certain ranges of loads.

Original languageEnglish (US)
Pages (from-to)229-249
Number of pages21
JournalPure and Applied Geophysics PAGEOPH
Volume133
Issue number2
DOIs
StatePublished - Apr 1 1990
Externally publishedYes

Keywords

  • Micromechanics of ice fields
  • constitutive response
  • fractals

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Fingerprint

Dive into the research topics of 'Micromechanics model of ice fields-II: Monte Carlo simulation'. Together they form a unique fingerprint.

Cite this