Simulation of Ice Flow using the Finite-Element Method
Abstract A plane-strain, incremental, initial-strain finite-element analysis, incorporating creep laws appropriate for the ranges of stresses and temperature involved, is used to simulate typical ice-slope flow problems. The flow of a uniform ice slope, assuming the mass is intact and no basal slidi...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1977
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s002214300002966x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002966X |
id |
crcambridgeupr:10.1017/s002214300002966x |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s002214300002966x 2024-03-03T08:45:57+00:00 Simulation of Ice Flow using the Finite-Element Method Nguyen, T.Q. Emery, J.J. 1977 http://dx.doi.org/10.1017/s002214300002966x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002966X en eng Cambridge University Press (CUP) Journal of Glaciology volume 19, issue 81, page 678 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1977 crcambridgeupr https://doi.org/10.1017/s002214300002966x 2024-02-08T08:38:15Z Abstract A plane-strain, incremental, initial-strain finite-element analysis, incorporating creep laws appropriate for the ranges of stresses and temperature involved, is used to simulate typical ice-slope flow problems. The flow of a uniform ice slope, assuming the mass is intact and no basal sliding occurs, shows that differences in steady-state velocities can be by orders of magnitude for various creep laws. A non-uniform ice slope and a uniform slope behind a concrete wall are also considered. Time-independent developments of tensile crack and basal shear are investigated by introducing joint elements with appropriate stiffness properties at iceĢ¶rock interfaces and tension zones. Then, the simulation model is modified to account for both time-dependent basal sliding (surging) and tensile crack development. In one case, basal shear failure is considered imminent if the shear strain in a thin basal ice layer, that allows wide variation in sliding velocity, exceeds a critical value. For the other case, the basal ice layer is replaced by joint elements and the progressive shear-stress failure mechanism during flow is demonstrated. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 19 81 678 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Nguyen, T.Q. Emery, J.J. Simulation of Ice Flow using the Finite-Element Method |
topic_facet |
Earth-Surface Processes |
description |
Abstract A plane-strain, incremental, initial-strain finite-element analysis, incorporating creep laws appropriate for the ranges of stresses and temperature involved, is used to simulate typical ice-slope flow problems. The flow of a uniform ice slope, assuming the mass is intact and no basal sliding occurs, shows that differences in steady-state velocities can be by orders of magnitude for various creep laws. A non-uniform ice slope and a uniform slope behind a concrete wall are also considered. Time-independent developments of tensile crack and basal shear are investigated by introducing joint elements with appropriate stiffness properties at iceĢ¶rock interfaces and tension zones. Then, the simulation model is modified to account for both time-dependent basal sliding (surging) and tensile crack development. In one case, basal shear failure is considered imminent if the shear strain in a thin basal ice layer, that allows wide variation in sliding velocity, exceeds a critical value. For the other case, the basal ice layer is replaced by joint elements and the progressive shear-stress failure mechanism during flow is demonstrated. |
format |
Article in Journal/Newspaper |
author |
Nguyen, T.Q. Emery, J.J. |
author_facet |
Nguyen, T.Q. Emery, J.J. |
author_sort |
Nguyen, T.Q. |
title |
Simulation of Ice Flow using the Finite-Element Method |
title_short |
Simulation of Ice Flow using the Finite-Element Method |
title_full |
Simulation of Ice Flow using the Finite-Element Method |
title_fullStr |
Simulation of Ice Flow using the Finite-Element Method |
title_full_unstemmed |
Simulation of Ice Flow using the Finite-Element Method |
title_sort |
simulation of ice flow using the finite-element method |
publisher |
Cambridge University Press (CUP) |
publishDate |
1977 |
url |
http://dx.doi.org/10.1017/s002214300002966x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002966X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 19, issue 81, page 678 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300002966x |
container_title |
Journal of Glaciology |
container_volume |
19 |
container_issue |
81 |
container_start_page |
678 |
_version_ |
1792501664104579072 |