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VORTICES IN SHEAR BANDS IN SANDS

Abedi, Sara / Rechenmacher, Amy

Summary We show digital image-based experimental evidence of vortex structures within shear bands in sands deforming in plane strain compression. Spatially varying systematic patterns in kinematic data fields have been found within shear bands, defining a coordinated collapse event of the force chains that initially comprise the shear band upon formation. We have identified co-rotating vortices or “circulation cells” within the shear band by subtracting an overlaid linearly varying shear band displacement field from the observed nonhomogeneous shear band displacement field. These vortex structures correlate precisely with previously observed kinematic patterns.

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VORTICES IN SHEAR BANDS IN SANDS

Abedi, Sara / Rechenmacher, Amy

Summary We show digital image-based experimental evidence of vortex structures within shear bands in sands deforming in plane strain compression. Spatially varying systematic patterns in kinematic data fields have been found within shear bands, defining a coordinated collapse event of the force chains that initially comprise the shear band upon formation. We have identified co-rotating vortices or “circulation cells” within the shear band by subtracting an overlaid linearly varying shear band displacement field from the observed nonhomogeneous shear band displacement field. These vortex structures correlate precisely with previously observed kinematic patterns.

VORTICES IN SHEAR BANDS IN SANDS

Abedi, Sara / Rechenmacher, Amy

Summary We show digital image-based experimental evidence of vortex structures within shear bands in sands deforming in plane strain compression. Spatially varying systematic patterns in kinematic data fields have been found within shear bands, defining a coordinated collapse event of the force chains that initially comprise the shear band upon formation. We have identified co-rotating vortices or “circulation cells” within the shear band by subtracting an overlaid linearly varying shear band displacement field from the observed nonhomogeneous shear band displacement field. These vortex structures correlate precisely with previously observed kinematic patterns.

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Titel:

VORTICES IN SHEAR BANDS IN SANDS

Beteiligte:

Abedi, Sara (Autor:in) / Rechenmacher, Amy (Autor:in)

Erschienen in:

Multiscale and Multiphysics Processes in Geomechanics ; 21-24

Springer Series in Geomechanics and Geoengineering

Erscheinungsdatum:

01.01.2011

Format / Umfang:

4 pages

ISBN:

978-3-642-19629-4 , 978-3-642-19630-0

ISSN:

1866-8755 , 1866-8763

DOI:

https://doi.org/10.1007/978-3-642-19630-0_6

Medientyp:

Aufsatz/Kapitel (Buch)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

kinematic rotation , nonaffine deformation , shear band , vortex Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Geophysics and Environmental Physics

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Vortex Structures inside Shear Bands in Sands

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Evolution of force chains in shear bands in sands

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Evolution of force chains in shear bands in sands

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EXPERIMENTAL EVIDENCE OF STRUCTURAL DEVELOPMENT INSIDE SHEAR BANDS IN SANDS

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