| DOI: | 10.5194/tc-7-1447-2013
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| Scopus记录号: | 2-s2.0-84884748055
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| 论文题名: | Weak layer fracture: Facets and depth |
| 作者: | Reiweger I; , Schweizer J
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2013
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| 卷: | 7, 期:5 | | 起始页码: | 1447
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| 结束页码: | 1453
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| 语种: | 英语
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| 英文关键词: | algorithm
; avalanche
; crust
; displacement
; failure analysis
; fracture
; loading
; snow cover
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| 英文摘要: | Understanding failure initiation within weak snow layers is essential for modeling and predicting dry-snow slab avalanches. We therefore performed laboratory experiments with snow samples containing a weak layer consisting of either faceted crystals or depth hoar. During these experiments the samples were loaded with different loading rates and at various tilt angles until fracture. The strength of the samples decreased with increasing loading rate and increasing tilt angle. Additionally, we took pictures of the side of four samples with a high-speed video camera and calculated the displacement using a particle image velocimetry (PIV) algorithm. The fracture process within the weak layer could thus be observed in detail. Catastrophic failure started due to a shear fracture just above the interface between the depth hoar layer and the underlying crust. © Author(s) 2013. CC Attribution 3.0 License. |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/74945
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| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
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作者单位: | WSL, Institute for Snow and Avalanche Research SLF, Davos, Switzerland
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| Recommended Citation: | |
Reiweger I,, Schweizer J. Weak layer fracture: Facets and depth[J]. Cryosphere,2013-01-01,7(5)
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