Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078900 |
Stress Concentrations in Weak Snowpack Layers and Conditions for Slab Avalanche Release | |
Gaume, J.1,2; Chambon, G.3; van Herwijnen, A.2; Schweizer, J.2 | |
2018-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:16页码:8363-8369 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; France |
英文摘要 | Dry-snow slab avalanches release due to the formation of a crack in a weak layer buried below cohesive snow slabs, followed by rapid crack propagation. The onset of rapid crack propagation occurs if stresses at the crack tip in the weak layer overcome its strength. In this study, we use the finite element method to evaluate the maximum shear stress tau(max) induced by a preexisting crack in a weak snow layer allowing for the bending of the overlaying slab. It is shown that tau(max) increases with increasing crack length, slab thickness, slab density, weak layer elastic modulus, and slope angle. In contrast, tau(max) decreases with increasing elastic modulus of the slab. Assuming a realistic failure envelope, we computed the critical crack length a(c) for the onset of crack propagation. The model allows for remote triggering from flat (or low angle) terrain. Yet it shows that the critical crack length decreases with increasing slope angle. |
英文关键词 | snow slab avalanche weak layer collapse stress concentration |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500054 |
WOS关键词 | CRACK-PROPAGATION ; FRACTURE ; FAILURE ; HETEROGENEITY ; PROPENSITY ; STABILITY ; MECHANISM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27362 |
专题 | 气候变化 |
作者单位 | 1.Swiss Fed Inst Technol EPFL, Sch Architecture Civil & Environm Engn, Lausanne, Switzerland; 2.WSL Inst Snow & Avalanche Res SLF, Davos, Switzerland; 3.Univ Grenoble Alpes, IRSTEA UR ETGR, Grenoble, France |
推荐引用方式 GB/T 7714 | Gaume, J.,Chambon, G.,van Herwijnen, A.,et al. Stress Concentrations in Weak Snowpack Layers and Conditions for Slab Avalanche Release[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):8363-8369. |
APA | Gaume, J.,Chambon, G.,van Herwijnen, A.,&Schweizer, J..(2018).Stress Concentrations in Weak Snowpack Layers and Conditions for Slab Avalanche Release.GEOPHYSICAL RESEARCH LETTERS,45(16),8363-8369. |
MLA | Gaume, J.,et al."Stress Concentrations in Weak Snowpack Layers and Conditions for Slab Avalanche Release".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):8363-8369. |
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。
修改评论