Dynamic anticrack propagation in snow

Continuum numerical modeling of dynamic crack propagation has been a great challenge over the past decade. This is particularly the case for anticracks in porous materials, as reported in sedimentary rocks, deep earthquakes, landslides, and snow avalanches, as material inter-penetration further comp...

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Bibliographic Details
Published in:Nature communications 2018-08, Vol.9 (1), p.3047-10, Article 3047
Main Authors: Gaume, J., Gast, T., Teran, J., van Herwijnen, A., Jiang, C.
Format: Article
Language:English
Subjects:
639/166/988
639/705/1041
704/4111
Accounting
Avalanches
Computer simulation
Crack propagation
Earthquakes
Elastoplasticity
Geomaterials
Gravitational collapse
Gravity
Hazard mitigation
Humanities and Social Sciences
Landslides
Mathematical models
multidisciplinary
Numerical methods
Phase transitions
Plastic flow
Porous materials
Propagation
Science
Science (multidisciplinary)
Sedimentary rocks
Seismic activity
Snow
Snow avalanches
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Summary:Continuum numerical modeling of dynamic crack propagation has been a great challenge over the past decade. This is particularly the case for anticracks in porous materials, as reported in sedimentary rocks, deep earthquakes, landslides, and snow avalanches, as material inter-penetration further complicates the problem. Here, on the basis of a new elastoplasticity model for porous cohesive materials and a large strain hybrid Eulerian–Lagrangian numerical method, we accurately reproduced the onset and propagation dynamics of anticracks observed in snow fracture experiments. The key ingredient consists of a modified strain-softening plastic flow rule that captures the complexity of porous materials under mixed-mode loading accounting for the interplay between cohesion loss and volumetric collapse. Our unified model represents a significant step forward as it simulates solid-fluid phase transitions in geomaterials which is of paramount importance to mitigate and forecast gravitational hazards. Anticrack propagation in snow results from the mixed-mode failure and collapse of a buried weak layer and can lead to slab avalanches. Here, authors reproduce the complex dynamics of anticrack propagation observed in field experiments using a Material Point Method with large strain elastoplasticity.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-018-05181-w