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Friction and Localization Associated with Non-spherical Particles

  • A. V. DyskinEmail author
  • E. Pasternak
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG, volume 11)

Abstract

Effect of rotations of particles of non-spherical shape is considered. Under combined action of shear and compressive forces, the moment balance produces apparent negative stiffness. In the case when friction is controlled by rotating particles non-sphericity leads to oscillating friction force. In the case of particulate materials in compression this may lead, under certain magnitudes of compression, to the initiation of global negative stiffness and, subsequently, strain localization.

Keywords

Particle rotation Negative stiffness Effective characteristics Self-consistent method Instability 

Notes

Acknowledgements

This research is supported by ARC Discovery Grants DP0988449, DP0773839 and WA Geothermal Centre of Excellence.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.School of Civil and Resource EngineeringUniversity of Western AustraliaPerthAustralia
  2. 2.School of Mechanical EngineeringUniversity of Western AustraliaPerthAustralia

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