Dynamic anticrack propagation in snow

J. Gaume (), T. Gast, J. Teran, A. van Herwijnen and C. Jiang
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J. Gaume: Swiss Federal Institute of Technology
T. Gast: University of California
J. Teran: University of California
A. van Herwijnen: WSL Institute for Snow and Avalanche Research SLF
C. Jiang: Jixie Effects

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract 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.

Date: 2018
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DOI: 10.1038/s41467-018-05181-w

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