Microstructure and Mechanical Behaviour of Ice

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by Nirmal K. Sinha, Natl Research Council of Canada, Ottawa, Canada,

Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract: Short descriptions are given for ice in nature, test methods used to evaluate their deformation behaviour and, a general microstructure-based constitutive equation. Equations suitable for high homologous temperatures and specifically appropriate for columnar-grained and equiaxed materials, are presented as examples. They can handle multiaxial and variable stresses. The theory has incorporated the microstructure-dependent matrix elastic response, grain-boundary shearing induced elastic deformation and microcracking activity, grain-structure dependent shape and size of the cracks, and the enhancing effects of microcrack-damage on intracrystalline matrix deformation.

Subject Headings: Material tests | Ice | Deformation (mechanics) | Microstructure | Grain (material) | Cracking | Constitutive relations |

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