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Acta Geotechnica

, Volume 13, Issue 3, pp 549–555 | Cite as

A model for decoding the life cycle of granular avalanches in a rotating drum

  • Eloïse Marteau
  • José E. AndradeEmail author
Research Paper
  • 388 Downloads

Abstract

Granular materials can behave as harmless sand dunes or as devastating landslides. A granular avalanche marks the transition between these distinct solid-like and fluid-like states. The solid-like state is typically described using plasticity models from critical state theory. In the fluid regime, granular flow is commonly captured using a visco-plastic model. However, due to our limited understanding of the mechanism governing the solid–fluid-like transition, characterizing the material behavior throughout the life cycle of an avalanche remains an open challenge. Here, we employ laboratory experiments of transient avalanches spontaneously generated by a rotating drum. We report measurements of dilatancy and grain kinematics before, during, and after each avalanche. Those measurements are directly incorporated into a rate-dependent plasticity model that quantitatively predicts the granular flow measured in experiments. Furthermore, we find that dilatancy in the solid-like state controls the triggering of granular avalanches and therefore plays a key role in the solid–fluid-like transition. With the proposed approach, we demonstrate that the life cycle of a laboratory avalanche, from triggering to run out, can be fully explained. Our results represent an important step toward a unified understanding of the physical phenomena associated with transitional behavior in granular media.

Keywords

Avalanches Dilatancy Granular materials Plasticity Rate dependent Solid/fluid transition 

Notes

Acknowledgements

The author would like to thank Ryan Hurley for his fruitful comments. This work has been partially funded by Keck Institute for Space Studies (KISS) and the California Institute of Technology; this support is gratefully acknowledged.

Supplementary material

11440_2017_609_MOESM1_ESM.docx (48 kb)
Supplementary material 1 (DOCX 48 kb)
11440_2017_609_MOESM2_ESM.mp4 (19.8 mb)
Supplementary material 2 (MP4 20258 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Division of Engineering and Applied ScienceCalifornia Institute of TechnologyPasadenaUSA

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