Climate Change Data Portal
| DOI | 10.5194/tc-10-1339-2016 |
| A Maxwell elasto-brittle rheology for sea ice modelling | |
| Dansereau V.; Weiss J.; Saramito P.; Lattes P. | |
| 发表日期 | 2016 |
| ISSN | 19940416 |
| 卷号 | 10期号:3 |
| 英文摘要 | 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. © Author(s) 2016. |
| 学科领域 | advection; anisotropy; brittle deformation; elastic modulus; ice cover; ice mechanics; mechanical property; rheology; rock mechanics; sea ice; timescale |
| 语种 | 英语 |
| scopus关键词 | advection; anisotropy; brittle deformation; elastic modulus; ice cover; ice mechanics; mechanical property; rheology; rock mechanics; sea ice; timescale |
| 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/119627 |
| 作者单位 | Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS UMR 5183, Université de Grenoble, Grenoble, France; Institut des Sciences de la Terre, CNRS UMR 5275, Université de Grenoble, Grenoble, France; Laboratoire Jean Kuntzmann, CNRS UMR 5224, Université de Grenoble, Grenoble, France; TOTAL S.A. - DGEP/DEV/TEC/GEO, Paris, France |
| 推荐引用方式 GB/T 7714 | Dansereau V.,Weiss J.,Saramito P.,et al. A Maxwell elasto-brittle rheology for sea ice modelling[J],2016,10(3). |
| APA | Dansereau V.,Weiss J.,Saramito P.,&Lattes P..(2016).A Maxwell elasto-brittle rheology for sea ice modelling.Cryosphere,10(3). |
| MLA | Dansereau V.,et al."A Maxwell elasto-brittle rheology for sea ice modelling".Cryosphere 10.3(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。
