 |
| Titel |
Weak layer fracture: facets and depth hoar |
| VerfasserIn |
I. Reiweger, J. Schweizer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 5 ; Nr. 7, no. 5 (2013-09-23), S.1447-1453 |
| Datensatznummer |
250085159
|
| Publikation (Nr.) |
 copernicus.org/tc-7-1447-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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. |
| |
|
| Teil von |
|
|
|
|
|
|
|