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Related Experiment Videos

Where does a cohesive granular heap break?

F Restagno1, L Bocquet, E Charlaix

  • 1Laboratoire de physique des solides, UMR CNRS 8502, Bat. 510, Campus universitaire, 91405, Orsay Cedex, France. restagno@lps.u-psud.fr

The European Physical Journal. E, Soft Matter
|July 16, 2004
PubMed
Summary
This summary is machine-generated.

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Cohesion significantly impacts granular heap stability, influencing the failure plane

Area of Science:

  • Geophysics and granular mechanics.
  • Material science of cohesive granular materials.

Background:

  • Granular heaps exhibit complex stability behaviors influenced by inter-particle forces.
  • Understanding cohesion's role is crucial for predicting material failure.

Purpose of the Study:

  • To investigate the effect of cohesion on granular heap stability.
  • To compute the maximum angle of stability as a function of cohesion.
  • To analyze how cohesion's dependence on local pressure affects failure plane localization.

Main Methods:

  • Analytical computation of the maximum angle of stability.
  • Modeling the dependence of cohesion on local pressure.
  • Comparing failure plane localization for constant versus variable cohesion.

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Main Results:

  • Granular heap stability is strongly influenced by the pressure dependence of cohesion.
  • Constant cohesion leads to deep internal slip planes.
  • Linear variation of cohesion with normal stress results in surface failure.

Conclusions:

  • The pressure dependence of cohesion is a key factor in determining granular heap failure modes.
  • Observed transitions in failure planes can explain experimental results in cohesive materials.
  • This study provides insights into the mechanical behavior of cohesive granular systems.