A Maxwell elasto-brittle rheology for sea ice modelling
A new rheological model is developed that builds on an elasto-brittle (EB) framework used for sea ice and rock mechanics, with the intent of representing both the small elastic deformations associated with fracturing processes and the larger deformations occurring along the faults/leads once the mat...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011960 2023-05-15T18:17:26+02:00 A Maxwell elasto-brittle rheology for sea ice modelling Dansereau, Véronique Weiss, Jérôme Saramito, Pierre Lattes, Philippe 2016-07 electronic https://doi.org/10.5194/tc-10-1339-2016 https://noa.gwlb.de/receive/cop_mods_00011960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011917/tc-10-1339-2016.pdf https://tc.copernicus.org/articles/10/1339/2016/tc-10-1339-2016.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1339-2016 https://noa.gwlb.de/receive/cop_mods_00011960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011917/tc-10-1339-2016.pdf https://tc.copernicus.org/articles/10/1339/2016/tc-10-1339-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/tc-10-1339-2016 2022-02-08T22:56:18Z A new rheological model is developed that builds on an elasto-brittle (EB) framework used for sea ice and rock mechanics, with the intent of representing both the small elastic deformations associated with fracturing processes and the larger deformations occurring along the faults/leads once the material is highly damaged and fragmented. A viscous-like relaxation term is added to the linear-elastic constitutive law together with an effective viscosity that evolves according to the local level of damage of the material, like its elastic modulus. The coupling between the level of damage and both mechanical parameters is such that within an undamaged ice cover the viscosity is infinitely large and deformations are strictly elastic, while along highly damaged zones the elastic modulus vanishes and most of the stress is dissipated through permanent deformations. A healing mechanism is also introduced, counterbalancing the effects of damaging over large timescales. In this new model, named Maxwell-EB after the Maxwell rheology, the irreversible and reversible deformations are solved for simultaneously; hence drift velocities are defined naturally. First idealized simulations without advection show that the model reproduces the main characteristics of sea ice mechanics and deformation: strain localization, anisotropy, intermittency and associated scaling laws. Article in Journal/Newspaper Sea ice The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 10 3 1339 1359 |
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article Verlagsveröffentlichung Dansereau, Véronique Weiss, Jérôme Saramito, Pierre Lattes, Philippe A Maxwell elasto-brittle rheology for sea ice modelling |
topic_facet |
article Verlagsveröffentlichung |
description |
A new rheological model is developed that builds on an elasto-brittle (EB) framework used for sea ice and rock mechanics, with the intent of representing both the small elastic deformations associated with fracturing processes and the larger deformations occurring along the faults/leads once the material is highly damaged and fragmented. A viscous-like relaxation term is added to the linear-elastic constitutive law together with an effective viscosity that evolves according to the local level of damage of the material, like its elastic modulus. The coupling between the level of damage and both mechanical parameters is such that within an undamaged ice cover the viscosity is infinitely large and deformations are strictly elastic, while along highly damaged zones the elastic modulus vanishes and most of the stress is dissipated through permanent deformations. A healing mechanism is also introduced, counterbalancing the effects of damaging over large timescales. In this new model, named Maxwell-EB after the Maxwell rheology, the irreversible and reversible deformations are solved for simultaneously; hence drift velocities are defined naturally. First idealized simulations without advection show that the model reproduces the main characteristics of sea ice mechanics and deformation: strain localization, anisotropy, intermittency and associated scaling laws. |
format |
Article in Journal/Newspaper |
author |
Dansereau, Véronique Weiss, Jérôme Saramito, Pierre Lattes, Philippe |
author_facet |
Dansereau, Véronique Weiss, Jérôme Saramito, Pierre Lattes, Philippe |
author_sort |
Dansereau, Véronique |
title |
A Maxwell elasto-brittle rheology for sea ice modelling |
title_short |
A Maxwell elasto-brittle rheology for sea ice modelling |
title_full |
A Maxwell elasto-brittle rheology for sea ice modelling |
title_fullStr |
A Maxwell elasto-brittle rheology for sea ice modelling |
title_full_unstemmed |
A Maxwell elasto-brittle rheology for sea ice modelling |
title_sort |
maxwell elasto-brittle rheology for sea ice modelling |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-1339-2016 https://noa.gwlb.de/receive/cop_mods_00011960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011917/tc-10-1339-2016.pdf https://tc.copernicus.org/articles/10/1339/2016/tc-10-1339-2016.pdf |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1339-2016 https://noa.gwlb.de/receive/cop_mods_00011960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011917/tc-10-1339-2016.pdf https://tc.copernicus.org/articles/10/1339/2016/tc-10-1339-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-10-1339-2016 |
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The Cryosphere |
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10 |
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3 |
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1339 |
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1359 |
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1766191650270347264 |