Length Scales for Nonaffine Deformation in Localized, Granular Shear Chapter

abstract

• 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.

authors

• Abedi Mashhadimighani, Sara

author list (cited authors)

• Rechenmacher, A. L., & Abedi, S.

citation count

• 3

complete list of authors

• Rechenmacher, AL||Abedi, S

editor list (cited editors)

• Bonelli, S., Dascalu, C., & Nicot, F.

Book Title

• Advances in Bifurcation and Degradation in Geomaterials: Proceedings of the 9th International Workshop on Bifurcation and Degradation in Geomaterials

publication date

• 2011

publisher

• Springer Netherlands  Publisher

published in

• Springer Series in Geomechanics and Geoengineering  Journal

keywords

• Granular Material
• Length Scales
• Non-affine Deformation
• Shear Bands
• Vortices

Digital Object Identifier (DOI)

• 10.1007/978-94-007-1421-2_8

International Standard Book Number (ISBN) 13

• 978-94-007-1421-2

start page

• 59

end page

• 65

volume

• 11

URL

• http://dx.doi.org/10.1007/978-94-007-1421-2_8