On the relationship between neck length and bond radius during compression of snow
Abstract In an earlier study on the variations in micro-structure during large volumetric deformations of snow, the authors observed that, contrary to expectations, the length of necked regions connecting adjacent grains did not necessarily decrease during compression. Rather, there was no discernib...
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Language: | English |
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Cambridge University Press (CUP)
1991
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Online Access: | http://dx.doi.org/10.1017/s0022143000007218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007218 |
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crcambridgeupr:10.1017/s0022143000007218 2024-03-03T08:46:09+00:00 On the relationship between neck length and bond radius during compression of snow Brown, R. L. Edens, M. Q. 1991 http://dx.doi.org/10.1017/s0022143000007218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007218 en eng Cambridge University Press (CUP) Journal of Glaciology volume 37, issue 126, page 203-208 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1991 crcambridgeupr https://doi.org/10.1017/s0022143000007218 2024-02-08T08:40:37Z Abstract In an earlier study on the variations in micro-structure during large volumetric deformations of snow, the authors observed that, contrary to expectations, the length of necked regions connecting adjacent grains did not necessarily decrease during compression. Rather, there was no discernible or predictable change in neck length, in some cases increasing and in others decreasing. Further evaluations of the data and an analysis of the mechanics of neck deformation determined that the process is complicated by three different effects: (1) increase in coordination number (number of bonds per grain), (ii) plastic deformation of the neck, and (iii) a geometric effect determined by bond growth and grain geometry. It is found that the first two effects tend to decrease the neck length and that the third produces an increase in mean neck length. A set of coupled differential equations is developed describing the variation of neck length and bond radius, and solved numerically for conditions consistent with the experimental data. Calculated results agree well with the data for the bond radius but the results for the neck length are less satisfactory. Reasons for this lie with difficulty in making accurate measurements of mean neck length from two-dimensional surface-section data and in the criteria for the definition of necks. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 37 126 203 208 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Brown, R. L. Edens, M. Q. On the relationship between neck length and bond radius during compression of snow |
topic_facet |
Earth-Surface Processes |
description |
Abstract In an earlier study on the variations in micro-structure during large volumetric deformations of snow, the authors observed that, contrary to expectations, the length of necked regions connecting adjacent grains did not necessarily decrease during compression. Rather, there was no discernible or predictable change in neck length, in some cases increasing and in others decreasing. Further evaluations of the data and an analysis of the mechanics of neck deformation determined that the process is complicated by three different effects: (1) increase in coordination number (number of bonds per grain), (ii) plastic deformation of the neck, and (iii) a geometric effect determined by bond growth and grain geometry. It is found that the first two effects tend to decrease the neck length and that the third produces an increase in mean neck length. A set of coupled differential equations is developed describing the variation of neck length and bond radius, and solved numerically for conditions consistent with the experimental data. Calculated results agree well with the data for the bond radius but the results for the neck length are less satisfactory. Reasons for this lie with difficulty in making accurate measurements of mean neck length from two-dimensional surface-section data and in the criteria for the definition of necks. |
format |
Article in Journal/Newspaper |
author |
Brown, R. L. Edens, M. Q. |
author_facet |
Brown, R. L. Edens, M. Q. |
author_sort |
Brown, R. L. |
title |
On the relationship between neck length and bond radius during compression of snow |
title_short |
On the relationship between neck length and bond radius during compression of snow |
title_full |
On the relationship between neck length and bond radius during compression of snow |
title_fullStr |
On the relationship between neck length and bond radius during compression of snow |
title_full_unstemmed |
On the relationship between neck length and bond radius during compression of snow |
title_sort |
on the relationship between neck length and bond radius during compression of snow |
publisher |
Cambridge University Press (CUP) |
publishDate |
1991 |
url |
http://dx.doi.org/10.1017/s0022143000007218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007218 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 37, issue 126, page 203-208 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000007218 |
container_title |
Journal of Glaciology |
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37 |
container_issue |
126 |
container_start_page |
203 |
op_container_end_page |
208 |
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1792502123767791616 |