Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice
Abstract Observations on the spatial distribution and on the strain dependence of the crack density are given for cracks formed during compressive, unidirectional, constant-strain-rate deformation of columnar-grain ice. Specimens, in the grain-size range of about 2 9 mm, were strained at the nominal...
Published in: | Journal of Glaciology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1999
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000001763 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001763 |
id |
crcambridgeupr:10.1017/s0022143000001763 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000001763 2024-03-03T08:46:04+00:00 Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice Gold, Lorne W. 1999 http://dx.doi.org/10.1017/s0022143000001763 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001763 en eng Cambridge University Press (CUP) Journal of Glaciology volume 45, issue 150, page 264-272 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1999 crcambridgeupr https://doi.org/10.1017/s0022143000001763 2024-02-08T08:32:56Z Abstract Observations on the spatial distribution and on the strain dependence of the crack density are given for cracks formed during compressive, unidirectional, constant-strain-rate deformation of columnar-grain ice. Specimens, in the grain-size range of about 2 9 mm, were strained at the nominal rates of 10 −3 , 10 −4 and 10 −5 s −1 at 10°C. The axis of hexagonal crystallographic symmetry of each specimen grain tended to be in the plane perpendicular to the long direction of the grains and to have a random orientation in that plane. For stress applied perpendicular to the long direction of the grains, the deformation was practically two-dimensional. It was found that the log-normal distribution function provided a good approximation to the strain dependence of the crack density. Statistical characteristics of the distribution had a maximum in the same range of strain rate as found for the strength of columnar-grain ice. Analysis of the spatial distribution of the cracks indicated some deviation from randomness for specimens of grain-size less than 5 mm and total strain less than 50 × 10 −4 . The observations provide further evidence that crack formation under the experimental conditions is a random process. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 45 150 264 272 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Gold, Lorne W. Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
topic_facet |
Earth-Surface Processes |
description |
Abstract Observations on the spatial distribution and on the strain dependence of the crack density are given for cracks formed during compressive, unidirectional, constant-strain-rate deformation of columnar-grain ice. Specimens, in the grain-size range of about 2 9 mm, were strained at the nominal rates of 10 −3 , 10 −4 and 10 −5 s −1 at 10°C. The axis of hexagonal crystallographic symmetry of each specimen grain tended to be in the plane perpendicular to the long direction of the grains and to have a random orientation in that plane. For stress applied perpendicular to the long direction of the grains, the deformation was practically two-dimensional. It was found that the log-normal distribution function provided a good approximation to the strain dependence of the crack density. Statistical characteristics of the distribution had a maximum in the same range of strain rate as found for the strength of columnar-grain ice. Analysis of the spatial distribution of the cracks indicated some deviation from randomness for specimens of grain-size less than 5 mm and total strain less than 50 × 10 −4 . The observations provide further evidence that crack formation under the experimental conditions is a random process. |
format |
Article in Journal/Newspaper |
author |
Gold, Lorne W. |
author_facet |
Gold, Lorne W. |
author_sort |
Gold, Lorne W. |
title |
Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
title_short |
Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
title_full |
Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
title_fullStr |
Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
title_full_unstemmed |
Statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
title_sort |
statistical characteristics for the strain-dependent density and the spatial position for deformation-induced cracks in columnar-grain ice |
publisher |
Cambridge University Press (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s0022143000001763 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001763 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 45, issue 150, page 264-272 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000001763 |
container_title |
Journal of Glaciology |
container_volume |
45 |
container_issue |
150 |
container_start_page |
264 |
op_container_end_page |
272 |
_version_ |
1792501938879725568 |