Climate Change Data Portal
| DOI | 10.5194/tc-10-3071-2016 |
| Strain localization and dynamic recrystallization in the ice-air aggregate: A numerical study | |
| Steinbach F.; Bons P.D.; Griera A.; Jansen D.; Llorens M.-G.; Roessiger J.; Weikusat I. | |
| 发表日期 | 2016 |
| ISSN | 19940416 |
| 卷号 | 10期号:6 |
| 英文摘要 | 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. © Author(s) 2016. |
| 学科领域 | dynamic response; firn; grain size; heterogeneity; ice mechanics; lattice dynamics; microstructure; numerical method; orientation; plastic deformation; recrystallization; rheology; strain analysis; Antarctica; East Antarctica; Queen Maud Land |
| 语种 | 英语 |
| scopus关键词 | dynamic response; firn; grain size; heterogeneity; ice mechanics; lattice dynamics; microstructure; numerical method; orientation; plastic deformation; recrystallization; rheology; strain analysis; Antarctica; East Antarctica; Queen Maud Land |
| 来源期刊 | Cryosphere
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119526 |
| 作者单位 | Department of Geosciences, Eberhard Karls University Tübingen, Tübingen, 72074, Germany; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany; Departament de Geologia, Universitat Autònoma de Barcelona, Bellaterra (Barcelona), 08193, Spain |
| 推荐引用方式 GB/T 7714 | Steinbach F.,Bons P.D.,Griera A.,et al. Strain localization and dynamic recrystallization in the ice-air aggregate: A numerical study[J],2016,10(6). |
| APA | Steinbach F..,Bons P.D..,Griera A..,Jansen D..,Llorens M.-G..,...&Weikusat I..(2016).Strain localization and dynamic recrystallization in the ice-air aggregate: A numerical study.Cryosphere,10(6). |
| MLA | Steinbach F.,et al."Strain localization and dynamic recrystallization in the ice-air aggregate: A numerical study".Cryosphere 10.6(2016). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
