CCPortal
DOI10.5194/tc-14-115-2020
Modeling snow slab avalanches caused by weak-layer failure - Part 1: Slabs on compliant and collapsible weak layers
Rosendahl P.L.; Weißgraeber P.
发表日期2020
ISSN19940416
EISSN14
起始页码115
结束页码130
卷号14期号:1
英文摘要Dry-snow slab avalanche release is preceded by a fracture process within the snowpack. Recognizing weak-layer collapse as an integral part of the fracture process is crucial and explains phenomena such as whumpf sounds and remote triggering of avalanches from low-angle terrain. In this two-part work we propose a novel closed-form analytical model for a snowpack under skier loading and a mixed-mode failure criterion for the nucleation of weak-layer failure. In the first part of this two-part series we introduce a closed-form analytical model of a snowpack accounting for the deformable layer. Despite the importance of persistent weak layers for slab avalanche release, no simple analytical model considering weak-layer deformations is available. The proposed model provides deformations of the snow slab, weak-layer stresses and energy release rates of cracks within the weak layer. It generally applies to skier-loaded slopes as well as stability tests such as the propagation saw test. A validation with a numerical reference model shows very good agreement of the stress and energy release rate results in several parametric studies including analyses of the bridging effect and slope angle dependence. The proposed model is used to analyze 93 propagation saw tests. Computed weak-layer fracture toughness values are physically meaningful and in excellent agreement with finite element analyses. In the second part of the series (Rosendahl and Weißgraeber, 2020) we make use of the present mechanical model to establish a novel failure criterion crack nucleation in weak layers. The code used for the analyses in both parts is publicly available under https://github.com/2phi/weac (last access: 6 January 2020) (2phi, 2020). © 2020 Author(s).
学科领域analytical method; avalanche; collapse; fracture toughness; nucleation; slab; slope angle; snowpack
语种英语
scopus关键词analytical method; avalanche; collapse; fracture toughness; nucleation; slab; slope angle; snowpack
来源期刊The Cryosphere
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/118780
作者单位2phi GbR, Tübingen, Germany; Department of Mechanical Engineering, Technische Universität Darmstadt, Darmstadt, Germany; Robert Bosch GmbH, Corporate Research and Advance Engineering, Renningen, Germany; ARENA2036 research campus, Universität Stuttgart, Stuttgart, Germany
推荐引用方式
GB/T 7714
Rosendahl P.L.,Weißgraeber P.. Modeling snow slab avalanches caused by weak-layer failure - Part 1: Slabs on compliant and collapsible weak layers[J],2020,14(1).
APA Rosendahl P.L.,&Weißgraeber P..(2020).Modeling snow slab avalanches caused by weak-layer failure - Part 1: Slabs on compliant and collapsible weak layers.The Cryosphere,14(1).
MLA Rosendahl P.L.,et al."Modeling snow slab avalanches caused by weak-layer failure - Part 1: Slabs on compliant and collapsible weak layers".The Cryosphere 14.1(2020).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Rosendahl P.L.]的文章
[Weißgraeber P.]的文章
百度学术
百度学术中相似的文章
[Rosendahl P.L.]的文章
[Weißgraeber P.]的文章
必应学术
必应学术中相似的文章
[Rosendahl P.L.]的文章
[Weißgraeber P.]的文章
相关权益政策
暂无数据
收藏/分享

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。