Length Scales for Nonaffine Deformation in Localized, Granular Shear

  • Amy L. RechenmacherEmail author
  • Sara Abedi
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG, volume 11)


We offer experimental observations of meso-scale deformation and kinematic activity within sheared granular layers to investigate the nature and spatial periodicity of nonaffine displacement fields within shear bands in a granular material. Prismatic specimens of sands and glass beads are subjected to plane strain deformation in which zero-strain conditions are enforced by translucent glass walls. We use the Digital Image Correlation (DIC) to track movements of small, overlapping particle clusters. By subtracting a superimposed first-order shear displacement field from the observed non-affine displacement fields, co-rotational vortices appear and coordinate with previously-observed kinematic patterns. We undertake a preliminary assessment of the spatial periodicity of such patterns to glimpse the nature of an underlying length scale for granular material deformation.


Granular material Shear bands Non-affine deformation Vortices Length scales 



The authors would like to thank the National Science Foundation (grant CMMI-0748284), USC and the USC WiSE program for their financial support of this research.


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringUniversity of Southern CaliforniaLos AngelesUSA

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