UID:
kobvindex_GFZ20190425155353
Format:
v, 107 Seiten
,
Illustrationen
Series Statement:
CRREL Report 84-9
Content:
This report presents the results of the first phase of a test program designed to obtain a comprehensive understanding of the mechanical properties of multi-year sea ice from the Alaskan Beaufort Sea. In Phase I, 222 constant-strain-rate uni-axial compression tests were performed on ice samples from ten multi-year pressure ridges to examine the magnitude and variation of ice strength within and between pressure ridges. A limited number of constant-strain-rate compression and tension tests, constant-load compression tests, and conventional triaxial tests were also performed on ice samples from a multi-year floe to provide preliminary data for developing ice yield criteria and constitutive laws for multi-year sea ice. Data are presented on the strength, failure strain, and modulus of multi-year sea ice under different loading conditions. The statistical variation of ice strength within and between pressure ridges is examined, as well as the effects of ice temperature, porosity, structure, strain rate and confining pressure on the mechanical properties of multi-year sea ice.
Note:
CONTENTS
Abstract
Preface
Introduction
Field Sampling
Site selection and description
Ice sampling procedures
Shipping and storage of ice samples
Testing Techniques
Multi-year Pressure Ridge Tests
Ice description
Sampling scheme and test variables
Uniaxial compressive strength
Residual compressive strength
Failure strains
Initial tangent modulus
Statistical Variations in Ice Strength
Differences in strength above and below level ice
Sources of the variation in strength
Shape of the strength histograms
Multi-year Floe Ice Tests
Ice description
Uniaxial compressive strength
Constant-load compression tests
Constant-strain-rate tension tests
Triaxial tests
Conclusions
Literature Cited
Appendix A: Structural profile of a multi-year pressure ridge core
Appendix B: Ridge uniaxial compression test data
Appendix C: Structural profile of the continuous multi-year floe core
Appendix D: Multi-year floe test data
In:
CRREL Report, 84-9
Language:
English
Keywords:
Forschungsbericht
URL:
https://apps.dtic.mil/docs/citations/ADA144132
URL:
https://hdl.handle.net/11681/9279
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