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Dynamic anticrack propagation in snow.

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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Gaume J,Gast T,Teran J,van Herwijnen A,Jiang C

doi

10.1038/s41467-018-05181-w

subject

Has Abstract

pub_date

2018-08-03 00:00:00

pages

3047

issue

1

issn

2041-1723

pii

10.1038/s41467-018-05181-w

journal_volume

9

pub_type

杂志文章

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