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https://hdl.handle.net/11681/2746| Title: | Plastic deformation of hollow ice cylinders under hydrostatic pressure |
| Authors: | Hokkaido University Higashi, Akira, 1922- |
| Keywords: | Ice Ice plasticity Plastic deformation Ice compression Compression tests Hydrostatic pressure Creep Ice creep Elastic shells Elastic plates Elasticity |
| Publisher: | U.S. Army Snow, Ice, and Permafrost Research Establishment. Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Research report (U.S. Army Snow |
| Description: | Research Report Summary: The study was made in order to simulate the deformation of a tunnel in glacier ice and compare the results with the theoretical value derived from compression or tension tests. The plastic deformation of commercial polycrystalline ice and manufactured snow-ice was determined by measuring the discharge of oil from the cavity of closed hollow ice cylinders subjected to high external pressure in an oil-filled pressure chamber. The deformation vs time curves were similar to those obtained in compression or tension tests. The relationships between minimum strain rate and applied pressure, or between minimum strain rate and the circumferential stress at the surface of the inner cavity, were found to differ from the power law ϵ ̇= ασⁿ, the value of n being an increasing function of stress. Analysis of time deformation curves indicates that viscoelastic models proposed by former investigators do not apply to the mechanism of the plastic deformation of ice. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/2746 |
| Appears in Collections: | Research Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SIPRE-Research-Report-51.pdf | 9.03 MB | Adobe PDF |  View/Open |