Micro-Damage Process Model for Polycrystalline Ice

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



Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond

Abstract:

This paper presents a micro-damage process model for freshwater polycrystalline ice deforming at the high end of the ductile-to-brittle transitional domain of strain rated. Damage is attributed to microcracking induced by the applied stress and microstructural stresses stemming from local mismatch strains. Microcrack initiation is analyzed using mixed-mode linear elastic fracture mechanics, and the elastic degradation of the material is computed using the self-consistent method. The numerical predictions agree with experimental data on compressive fracture, and are able to capture salient features of failure processes in ice.

Subject Headings: Ice | Failure analysis | Cracking | Strain | Strain rates | Fracture mechanics | Elastic analysis

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