Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study
We performed numerical simulations on the micro-dynamics of ice with air inclusions as a second phase. This provides first results of a numerical approach to model dynamic recrystallisation in polyphase crystalline aggregates. Our aim was to investigate the rheological effects of air inclusions and...
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ftawi:oai:epic.awi.de:41238 2024-09-15T17:41:09+00:00 Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens Verde, Maria Gema Roessiger, Jens Weikusat, Ilka 2016 application/pdf https://epic.awi.de/id/eprint/41238/ https://epic.awi.de/id/eprint/41238/1/Steinbach2016.pdf http://www.the-cryosphere-discuss.net/tc-2016-167/ https://hdl.handle.net/10013/epic.48308 https://hdl.handle.net/10013/epic.48308.d001 unknown EGU https://epic.awi.de/id/eprint/41238/1/Steinbach2016.pdf https://hdl.handle.net/10013/epic.48308.d001 Steinbach, F. , Bons, P. D. , Griera, A. , Jansen, D. orcid:0000-0002-4412-5820 , Llorens Verde, M. G. , Roessiger, J. and Weikusat, I. orcid:0000-0002-3023-6036 (2016) Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study , The Cryosphere Discussion . doi:10.5194/tc-2016-167 <https://doi.org/10.5194/tc-2016-167> , hdl:10013/epic.48308 EPIC3The Cryosphere Discussion, EGU Article notRev 2016 ftawi https://doi.org/10.5194/tc-2016-167 2024-06-24T04:14:20Z We performed numerical simulations on the micro-dynamics of ice with air inclusions as a second phase. This provides first results of a numerical approach to model dynamic recrystallisation in polyphase crystalline aggregates. Our aim was to investigate the rheological effects of air inclusions and explain the onset of dynamic recrystallisation in the permeable firn. The simulations employ a full field theory crystal plasticity code coupled to codes simulating dynamic recrystallisation 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 localisation controlled by air inclusions. This strain localisation gives rise to locally increased energies that drive dynamic recrystallisation 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 localisation associated with locally increased strain energies can explain the occurrence of dynamic recrystallisation. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land EPICA The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We performed numerical simulations on the micro-dynamics of ice with air inclusions as a second phase. This provides first results of a numerical approach to model dynamic recrystallisation in polyphase crystalline aggregates. Our aim was to investigate the rheological effects of air inclusions and explain the onset of dynamic recrystallisation in the permeable firn. The simulations employ a full field theory crystal plasticity code coupled to codes simulating dynamic recrystallisation 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 localisation controlled by air inclusions. This strain localisation gives rise to locally increased energies that drive dynamic recrystallisation 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 localisation associated with locally increased strain energies can explain the occurrence of dynamic recrystallisation. |
format |
Article in Journal/Newspaper |
author |
Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens Verde, Maria Gema Roessiger, Jens Weikusat, Ilka |
spellingShingle |
Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens Verde, Maria Gema Roessiger, Jens Weikusat, Ilka Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
author_facet |
Steinbach, Florian Bons, Paul D. Griera, Albert Jansen, Daniela Llorens Verde, Maria Gema Roessiger, Jens Weikusat, Ilka |
author_sort |
Steinbach, Florian |
title |
Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
title_short |
Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
title_full |
Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
title_fullStr |
Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
title_full_unstemmed |
Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study |
title_sort |
strain localisation and dynamic recrystallisation in the ice-air aggregate: a numerical study |
publisher |
EGU |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41238/ https://epic.awi.de/id/eprint/41238/1/Steinbach2016.pdf http://www.the-cryosphere-discuss.net/tc-2016-167/ https://hdl.handle.net/10013/epic.48308 https://hdl.handle.net/10013/epic.48308.d001 |
genre |
Antarc* Antarctica Dronning Maud Land EPICA The Cryosphere |
genre_facet |
Antarc* Antarctica Dronning Maud Land EPICA The Cryosphere |
op_source |
EPIC3The Cryosphere Discussion, EGU |
op_relation |
https://epic.awi.de/id/eprint/41238/1/Steinbach2016.pdf https://hdl.handle.net/10013/epic.48308.d001 Steinbach, F. , Bons, P. D. , Griera, A. , Jansen, D. orcid:0000-0002-4412-5820 , Llorens Verde, M. G. , Roessiger, J. and Weikusat, I. orcid:0000-0002-3023-6036 (2016) Strain localisation and dynamic recrystallisation in the ice-air aggregate: A numerical study , The Cryosphere Discussion . doi:10.5194/tc-2016-167 <https://doi.org/10.5194/tc-2016-167> , hdl:10013/epic.48308 |
op_doi |
https://doi.org/10.5194/tc-2016-167 |
_version_ |
1810487262117363712 |