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Influence of Scale on the Constitutive Behavior of Sea Ice

  • D. M. Cole
  • J. P. Dempsey
Part of the Solid Mechanics and Its Applications book series (SMIA, volume 94)

Abstract

The development of physically based constitutive models for sea ice has proven difficult because of a lack of knowledge about the underlying deformation mechanisms, and the lack of unambiguous experimental data at meaningful sizes. However, these shortcomings have been addressed to a measurable extent by the development of effective cyclic loading techniques for laboratory and in-situ experiments, coupled with an improved knowledge of the underlying deformation mechanisms. This progress has made it possible to develop a physically based constitutive model and verify it at meaningful scales. The paper examines the cyclic loading response of in-situ specimens of first-year sea ice ranging in size from 4 × 4 m2 to 30 x 30 m2 in the horizontal plane, along with results from laboratory experiments on field cores. The model predictions compare favorably with the field observations, and an essentially scale-independent constitutive response emerges. The in-situ experiments provide insight regarding the relaxation time distribution, and the anelastic and viscous components of strain. The results from acoustic emission monitoring during the in-situ experiments are also presented.

Keywords

Dislocation Density Acoustic Emission Crack Mouth Field Core Relaxation Time Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • D. M. Cole
    • 1
  • J. P. Dempsey
    • 2
  1. 1.Applied Research DivisionU.S. Army Cold Region Research and Engineering LaboratoryHanoverUSA
  2. 2.Department of Civil and Environmental EngineeringClarkson UniversityPotsdamUSA

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