Effect of Grain Size Variation on Damage in Polycrystalline Ice

by Mao S. Wu, Univ of Nebraska-Lincoln, Lincoln, United States,
S. Shyam Sunder, Univ of Nebraska-Lincoln, Lincoln, United States,



Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract:

This paper studies the effect of grain size distributions on damage accumulation in polycrystalline ice under uniaxial compression. The numerical results are derived from the internal-variable creep model and the micromechanical model of elastic damage proposed by the authors (Shyam Sunder and Wu, 1989a, b; Wu and Shyam Sunder, 1990a, b). The earlier damage model considers the basal plane orientation of the ice crystal and the precursor (i.e., microcrack nucleus) orientation as the two random variables which influence microcracking in ice. This paper presents an extended model with the grain size as an additional random variable, and studies the sensitivity of the numerical predictions to grain size variation.

Subject Headings: Ice | Grain (material) | Numerical models | Numerical methods | Mathematical models | Probability | Numerical analysis

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