On the strain-rate sensitivity of columnar ice
Abstract A power law relation between stress and strain rate of the form was used to describe the response to strain rate of S1 ice loaded across the columns at –10° C. The rate exponent, n , decreased with increasing strain from about 4.6 at an observed peak on the load displacement curve to approx...
| Published in: | Journal of Glaciology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1997
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0022143000034985 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034985 |
| Summary: | Abstract A power law relation between stress and strain rate of the form was used to describe the response to strain rate of S1 ice loaded across the columns at –10° C. The rate exponent, n , decreased with increasing strain from about 4.6 at an observed peak on the load displacement curve to approximately 2.6 at a shortening of 2%. Analysis of these results and of the results of other authors on different forms of ice deformed at the same temperature suggests that the power law exponent, n is proportional to F c /F g The parameter F c /F g is the far-field basal dislocation climb force divided by the glide force. |
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