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Dynamic Instability in Geomaterials Associated with the Presence of Negative Stiffness Elements

  • Elena PasternakEmail author
  • Arcady Dyskin
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

One of the mechanisms of instability in geomaterials is associated with the descending branch of stress-strain curve caused by internal fracturing. The descending stress-strain curve can also be produced by negative stiffness elements, one of the mechanisms of negative stiffness being the rotation of non-spherical grains. The presence of negative stiffness elements can cause dynamic instability in the geomaterials. We investigate a simple elastic model of dynamic instability consisting of chains of oscillators some with negative stiffness springs. We show that in a stable chain only one oscillator can have negative stiffness spring and formulate the criterion of stability.

Keywords

Negative Stiffness Dynamic Instability Stable Chain Simple Elastic Model Dyskine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors acknowledge the financial support through ARC Discovery Grant DP120102434.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.University of Western AustraliaPerthAustralia

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