UID:
kobvindex_GFZ20201124151617
Format:
iv, 10 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory 51
Content:
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.
Note:
CONTENTS
Preface
Summary
Introduction
Apparatus
Specimens
Experimental procedures and results
Analysis of the data
Discussion
References
In:
Research report / Cold Regions Research and Engineering Laboratory, 51
Language:
English
Keywords:
Forschungsbericht
URL:
https://hdl.handle.net/11681/2746
