Variational Methods for Glacier Mechanics Problems
Abstract The object of the research is to determine whether direct methods from the calculus of variations can provide convenient approximate solutions of complex problems in glacier mechanics. The Ritz technique is used to minimize an appropriate functional. Coordinate functions obtained from a fin...
Published in: | Journal of Glaciology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1981
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000011199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011199 |
id |
crcambridgeupr:10.1017/s0022143000011199 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000011199 2024-03-03T08:46:06+00:00 Variational Methods for Glacier Mechanics Problems Oakberg, Robert G. 1981 http://dx.doi.org/10.1017/s0022143000011199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011199 en eng Cambridge University Press (CUP) Journal of Glaciology volume 27, issue 95, page 19-24 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1981 crcambridgeupr https://doi.org/10.1017/s0022143000011199 2024-02-08T08:40:37Z Abstract The object of the research is to determine whether direct methods from the calculus of variations can provide convenient approximate solutions of complex problems in glacier mechanics. The Ritz technique is used to minimize an appropriate functional. Coordinate functions obtained from a finite-element model are combined with a coordinate function that is the solution of a related problem. The finite-element coordinate functions make localized adjustments to the related solution. Solutions of two sample problems are presented. An analysis of the closure of an intergranular vein in ice at the melting point is based upon a variational principle for velocities. An analysis of the flow of ice in a cylindrical channel is based upon a variational principle for stresses. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 27 95 19 24 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Oakberg, Robert G. Variational Methods for Glacier Mechanics Problems |
topic_facet |
Earth-Surface Processes |
description |
Abstract The object of the research is to determine whether direct methods from the calculus of variations can provide convenient approximate solutions of complex problems in glacier mechanics. The Ritz technique is used to minimize an appropriate functional. Coordinate functions obtained from a finite-element model are combined with a coordinate function that is the solution of a related problem. The finite-element coordinate functions make localized adjustments to the related solution. Solutions of two sample problems are presented. An analysis of the closure of an intergranular vein in ice at the melting point is based upon a variational principle for velocities. An analysis of the flow of ice in a cylindrical channel is based upon a variational principle for stresses. |
format |
Article in Journal/Newspaper |
author |
Oakberg, Robert G. |
author_facet |
Oakberg, Robert G. |
author_sort |
Oakberg, Robert G. |
title |
Variational Methods for Glacier Mechanics Problems |
title_short |
Variational Methods for Glacier Mechanics Problems |
title_full |
Variational Methods for Glacier Mechanics Problems |
title_fullStr |
Variational Methods for Glacier Mechanics Problems |
title_full_unstemmed |
Variational Methods for Glacier Mechanics Problems |
title_sort |
variational methods for glacier mechanics problems |
publisher |
Cambridge University Press (CUP) |
publishDate |
1981 |
url |
http://dx.doi.org/10.1017/s0022143000011199 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011199 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 27, issue 95, page 19-24 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000011199 |
container_title |
Journal of Glaciology |
container_volume |
27 |
container_issue |
95 |
container_start_page |
19 |
op_container_end_page |
24 |
_version_ |
1792501988308549632 |