Effect of Temperature on the Creep of Ice
Creep tests on homogeneous, isotropic polycrystalline ice gave an apparent activation energy for creep of 16.4 kcal/mol (68.8 kJ/mol) over the temperature range −10° to −60° C. Above −10° C the Arrhenius relation for temperature dependence is invalid, and creep rate becomes progressively more temper...
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Language: | English |
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Cambridge University Press (CUP)
1969
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Online Access: | http://dx.doi.org/10.1017/s0022143000020803 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020803 |
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crcambridgeupr:10.1017/s0022143000020803 2024-05-19T07:43:14+00:00 Effect of Temperature on the Creep of Ice Mellor, Malcolm Testa, Richard 1969 http://dx.doi.org/10.1017/s0022143000020803 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020803 en eng Cambridge University Press (CUP) Journal of Glaciology volume 8, issue 52, page 131-145 ISSN 0022-1430 1727-5652 journal-article 1969 crcambridgeupr https://doi.org/10.1017/s0022143000020803 2024-05-02T06:51:07Z Creep tests on homogeneous, isotropic polycrystalline ice gave an apparent activation energy for creep of 16.4 kcal/mol (68.8 kJ/mol) over the temperature range −10° to −60° C. Above −10° C the Arrhenius relation for temperature dependence is invalid, and creep rate becomes progressively more temperature dependent as the melting point is approached. Between −20° and −50° C the apparent activation energy for creep of a single crystal of ice was found to be 16.5 kcal/mol (69.1 kJ/mol). A complete creep curve for a single crystal loaded in uniaxial compression parallel to the basal plane was qualitatively similar to the classical creep curve; creep rate at all stages was very much faster than for polycrystalline ice under the same conditions. Creep tests on polycrystalline ice at 0° C gave a stress/strain-rate relation for that temperature, but its precise meaning is unclear, since recrystallization complicated the results. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 8 52 131 145 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Creep tests on homogeneous, isotropic polycrystalline ice gave an apparent activation energy for creep of 16.4 kcal/mol (68.8 kJ/mol) over the temperature range −10° to −60° C. Above −10° C the Arrhenius relation for temperature dependence is invalid, and creep rate becomes progressively more temperature dependent as the melting point is approached. Between −20° and −50° C the apparent activation energy for creep of a single crystal of ice was found to be 16.5 kcal/mol (69.1 kJ/mol). A complete creep curve for a single crystal loaded in uniaxial compression parallel to the basal plane was qualitatively similar to the classical creep curve; creep rate at all stages was very much faster than for polycrystalline ice under the same conditions. Creep tests on polycrystalline ice at 0° C gave a stress/strain-rate relation for that temperature, but its precise meaning is unclear, since recrystallization complicated the results. |
format |
Article in Journal/Newspaper |
author |
Mellor, Malcolm Testa, Richard |
spellingShingle |
Mellor, Malcolm Testa, Richard Effect of Temperature on the Creep of Ice |
author_facet |
Mellor, Malcolm Testa, Richard |
author_sort |
Mellor, Malcolm |
title |
Effect of Temperature on the Creep of Ice |
title_short |
Effect of Temperature on the Creep of Ice |
title_full |
Effect of Temperature on the Creep of Ice |
title_fullStr |
Effect of Temperature on the Creep of Ice |
title_full_unstemmed |
Effect of Temperature on the Creep of Ice |
title_sort |
effect of temperature on the creep of ice |
publisher |
Cambridge University Press (CUP) |
publishDate |
1969 |
url |
http://dx.doi.org/10.1017/s0022143000020803 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020803 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 8, issue 52, page 131-145 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000020803 |
container_title |
Journal of Glaciology |
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8 |
container_issue |
52 |
container_start_page |
131 |
op_container_end_page |
145 |
_version_ |
1799482952209399808 |