Acoustic emission signatures prior to snow failure
Snow slab avalanches are caused by cracks forming and propagating in a weak snow layer below a cohesive slab. The gradual damage process leading to the formation of the initial failure within the weak layer (WL) is still not entirely understood. To this end, we designed a novel test apparatus that a...
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Cambridge University Press
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Online Access: | https://doi.org/10.1017/jog.2018.43 https://doaj.org/article/ebd723d1bc2f43b9a36dabd94183fa75 |
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ftdoajarticles:oai:doaj.org/article:ebd723d1bc2f43b9a36dabd94183fa75 2023-05-15T16:57:37+02:00 Acoustic emission signatures prior to snow failure ACHILLE CAPELLI INGRID REIWEGER JÜRG SCHWEIZER 2018-08-01T00:00:00Z https://doi.org/10.1017/jog.2018.43 https://doaj.org/article/ebd723d1bc2f43b9a36dabd94183fa75 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143018000436/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.43 0022-1430 1727-5652 https://doaj.org/article/ebd723d1bc2f43b9a36dabd94183fa75 Journal of Glaciology, Vol 64, Pp 543-554 (2018) avalanches snow snow mechanics snow rheology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/jog.2018.43 2023-03-12T01:30:59Z Snow slab avalanches are caused by cracks forming and propagating in a weak snow layer below a cohesive slab. The gradual damage process leading to the formation of the initial failure within the weak layer (WL) is still not entirely understood. To this end, we designed a novel test apparatus that allows performing loading experiments with large snow samples (0.25 m2) including a WL at different loading rates and simultaneously monitoring the acoustic emissions (AE) response. By analyzing the AE generated by micro-cracking, we studied the evolution of the damage process preceding snow failure. At fast loading rates, the exponent of the AE energy distribution (b-value) gradually changed, and both the energy rate and the inverse waiting time increased exponentially with increasing load. These changes in AE signature indicate a transition from small to large events and an acceleration of the damage processes leading to brittle failure. For the experiments at slow loading rate, these changes in the AE signature were not or only partially present, even if the sample failed, indicating a different evolution of the damage process. The observed characteristics in AE response provide new insights on how to model snow failure as a critical phenomenon. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 64 246 543 554 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
avalanches snow snow mechanics snow rheology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
avalanches snow snow mechanics snow rheology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 ACHILLE CAPELLI INGRID REIWEGER JÜRG SCHWEIZER Acoustic emission signatures prior to snow failure |
topic_facet |
avalanches snow snow mechanics snow rheology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Snow slab avalanches are caused by cracks forming and propagating in a weak snow layer below a cohesive slab. The gradual damage process leading to the formation of the initial failure within the weak layer (WL) is still not entirely understood. To this end, we designed a novel test apparatus that allows performing loading experiments with large snow samples (0.25 m2) including a WL at different loading rates and simultaneously monitoring the acoustic emissions (AE) response. By analyzing the AE generated by micro-cracking, we studied the evolution of the damage process preceding snow failure. At fast loading rates, the exponent of the AE energy distribution (b-value) gradually changed, and both the energy rate and the inverse waiting time increased exponentially with increasing load. These changes in AE signature indicate a transition from small to large events and an acceleration of the damage processes leading to brittle failure. For the experiments at slow loading rate, these changes in the AE signature were not or only partially present, even if the sample failed, indicating a different evolution of the damage process. The observed characteristics in AE response provide new insights on how to model snow failure as a critical phenomenon. |
format |
Article in Journal/Newspaper |
author |
ACHILLE CAPELLI INGRID REIWEGER JÜRG SCHWEIZER |
author_facet |
ACHILLE CAPELLI INGRID REIWEGER JÜRG SCHWEIZER |
author_sort |
ACHILLE CAPELLI |
title |
Acoustic emission signatures prior to snow failure |
title_short |
Acoustic emission signatures prior to snow failure |
title_full |
Acoustic emission signatures prior to snow failure |
title_fullStr |
Acoustic emission signatures prior to snow failure |
title_full_unstemmed |
Acoustic emission signatures prior to snow failure |
title_sort |
acoustic emission signatures prior to snow failure |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/jog.2018.43 https://doaj.org/article/ebd723d1bc2f43b9a36dabd94183fa75 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 64, Pp 543-554 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143018000436/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.43 0022-1430 1727-5652 https://doaj.org/article/ebd723d1bc2f43b9a36dabd94183fa75 |
op_doi |
https://doi.org/10.1017/jog.2018.43 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
246 |
container_start_page |
543 |
op_container_end_page |
554 |
_version_ |
1766049171646709760 |