Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study
We performed numerical simulations on the microdynamics of ice with air inclusions as a second phase. Our aim was to investigate the rheological effects of air inclusions and explain the onset of dynamic recrystallization in the permeable firn. The simulations employ a full-field theory crystal plas...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011012 2023-05-15T13:34:49+02:00 Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens, Maria-Gema Roessiger, Jens Weikusat, Ilka 2016-12 electronic https://doi.org/10.5194/tc-10-3071-2016 https://noa.gwlb.de/receive/cop_mods_00011012 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010969/tc-10-3071-2016.pdf https://tc.copernicus.org/articles/10/3071/2016/tc-10-3071-2016.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-10-3071-2016 https://noa.gwlb.de/receive/cop_mods_00011012 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010969/tc-10-3071-2016.pdf https://tc.copernicus.org/articles/10/3071/2016/tc-10-3071-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/tc-10-3071-2016 2022-02-08T22:56:43Z We performed numerical simulations on the microdynamics of ice with air inclusions as a second phase. Our aim was to investigate the rheological effects of air inclusions and explain the onset of dynamic recrystallization in the permeable firn. The simulations employ a full-field theory crystal plasticity code coupled to codes simulating dynamic recrystallization processes and predict time-resolved microstructure evolution in terms of lattice orientations, strain distribution, grain sizes and grain-boundary network. Results show heterogeneous deformation throughout the simulations and indicate the importance of strain localization controlled by air inclusions. This strain localization gives rise to locally increased energies that drive dynamic recrystallization and induce heterogeneous microstructures that are coherent with natural firn microstructures from EPICA Dronning Maud Land ice coring site in Antarctica. We conclude that although overall strains and stresses in firn are low, strain localization associated with locally increased strain energies can explain the occurrence of dynamic recrystallization. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land EPICA The Cryosphere Niedersächsisches Online-Archiv NOA Dronning Maud Land The Cryosphere 10 6 3071 3089 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens, Maria-Gema Roessiger, Jens Weikusat, Ilka Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
topic_facet |
article Verlagsveröffentlichung |
description |
We performed numerical simulations on the microdynamics of ice with air inclusions as a second phase. Our aim was to investigate the rheological effects of air inclusions and explain the onset of dynamic recrystallization in the permeable firn. The simulations employ a full-field theory crystal plasticity code coupled to codes simulating dynamic recrystallization processes and predict time-resolved microstructure evolution in terms of lattice orientations, strain distribution, grain sizes and grain-boundary network. Results show heterogeneous deformation throughout the simulations and indicate the importance of strain localization controlled by air inclusions. This strain localization gives rise to locally increased energies that drive dynamic recrystallization and induce heterogeneous microstructures that are coherent with natural firn microstructures from EPICA Dronning Maud Land ice coring site in Antarctica. We conclude that although overall strains and stresses in firn are low, strain localization associated with locally increased strain energies can explain the occurrence of dynamic recrystallization. |
format |
Article in Journal/Newspaper |
author |
Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens, Maria-Gema Roessiger, Jens Weikusat, Ilka |
author_facet |
Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens, Maria-Gema Roessiger, Jens Weikusat, Ilka |
author_sort |
Steinbach, Florian |
title |
Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
title_short |
Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
title_full |
Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
title_fullStr |
Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
title_full_unstemmed |
Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
title_sort |
strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-3071-2016 https://noa.gwlb.de/receive/cop_mods_00011012 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010969/tc-10-3071-2016.pdf https://tc.copernicus.org/articles/10/3071/2016/tc-10-3071-2016.pdf |
geographic |
Dronning Maud Land |
geographic_facet |
Dronning Maud Land |
genre |
Antarc* Antarctica Dronning Maud Land EPICA The Cryosphere |
genre_facet |
Antarc* Antarctica Dronning Maud Land EPICA 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-10-3071-2016 https://noa.gwlb.de/receive/cop_mods_00011012 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010969/tc-10-3071-2016.pdf https://tc.copernicus.org/articles/10/3071/2016/tc-10-3071-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-10-3071-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
6 |
container_start_page |
3071 |
op_container_end_page |
3089 |
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1766057881259474944 |