Transients in sheared granular matter

The European Physical Journal. E, Soft Matter
Brian Utter, R P Behringer

Abstract

As dense granular materials are sheared, a shear band and an anisotropic force network form. The approach to steady-state behavior depends on the history of the packing and the existing force and contact network. We present experiments on shearing of dense granular matter in a 2D Couette geometry in which we probe the history and evolution of shear bands by measuring particle trajectories and stresses during transients. We find that when shearing is stopped and restarted in the same direction, steady-state behavior is immediately reached, in agreement with the typical assumption that the system is quasistatic. Although some relaxation of the force network is observed when shearing is stopped, quasistatic behavior is maintained because the contact network remains essentially unchanged. When the direction of shear is reversed, a transient occurs in which stresses initially decrease, changes in the force network reach further into the bulk, and particles far from the wheel become more mobile. This occurs because the force network is fragile to changes transverse to the force network established under previous shear; particles must rearrange before becoming jammed again, thereby providing resistance to shear in the reversed directi...Continue Reading

References

Jun 5, 2003·Chaos·Daniel W. HowellC. T. Veje
Apr 20, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Brian Utter, R P Behringer
Sep 28, 2004·Physical Review Letters·Masahiro ToiyaWolfgang Losert

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Citations

Dec 17, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C Coste
May 21, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Nathan W Mueggenburg
Apr 28, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Georg KovalFrançois Chevoir
Dec 31, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J-C Tsai, J P Gollub
May 14, 2016·Physical Review. E·Philip KrinningerMatthias Schmidt
Nov 14, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Geert H Wortel, Martin van Hecke
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Nov 5, 2013·Physical Review Letters·Fabian ZimberThorsten Pöschel
Jun 4, 2008·Physical Review Letters·Brian Utter, R P Behringer
Feb 21, 2006·Physical Review Letters·Xiang ChengSidney R Nagel
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Oct 15, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Balázs SzabóTamás Börzsönyi
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Nov 13, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Nicholas A PohlmanRichard M Lueptow

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