2020/09/02 by Marcus Landschulze, Landschulze, Marcus
Earth and Planetary Sciences · Environmental Science · Medicine · #Cryospheric studies and observations #FOS: Physical sciences #Geophysics (physics.geo-ph) #Landslides and related hazards #Winter Sports Injuries and Performance
paper · pdf · doi:10.48550/arxiv.2009.01092
openalex publication_date 2020/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The stability of dry-snow avalanches is strongly dependent on the interaction between the snow slab above a weak-layer and, as presented in this work, the skier induced load. This induced load causes an additional stress field on the slab which eventually triggers an avalanche. I present the results of 3D finite element simulations in an elastoplastic domain. The plastic deformation of the weak-layer follows the Mohr-Coulomb-Cap model which provides a more realistic model as a pure elastic approach. I investigate how the stress field on top of the weak-layer changes if one is skiing down-slope or parallel to the slope. A layered snow slab changes the stress on top of the weak-layer and to investigate these changes I simulated two different representative layered slabs. One containing only soft layers to investigate how the weak layer is affected by the ski induced stress and the other hard-soft-hard layer to examine bridge effects caused by the hard layers. A hard layer in the snow slab forms a sort of bridge which spreads the induced stress over a larger lateral distance, at the same time decreasing the stress to the layers below the bridge. Furthermore, I show a possible connection between the plastic deformation and the critical crack length.