Laser speckle correlation applied to flow field measurements in granular media

Hamm, E; Melo F.

Abstract

A laser speckle correlation method is developed to measure slow macroscopic flow fields in a randomly packed granular medium. The method is useful for planar geometry configurations like the one considered here, namely a sample that is subjected to an indentation type test. The main feature revealed by the method in this system, is the formation of shear bands of well-defined shapes, proper of a Coulomb-like material. We characterize these structures by showing that they concentrate vorticity and shear deformation. In addition, the method provides high-precision measurements of tiny displacements occurring far below shear bands. © EDP Sciences.

Más información

Título según WOS: Laser speckle correlation applied to flow field measurements in granular media
Título según SCOPUS: Laser speckle correlation applied to flow field measurements in granular media
Título de la Revista: EPL
Volumen: 73
Número: 3
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2006
Página de inicio: 356
Página final: 362
Idioma: English
URL: http://stacks.iop.org/0295-5075/73/i=3/a=356?key=crossref.193499c4a7a46929e8e90d2506f2fab6
DOI:

10.1209/epl/i2005-10412-8

Notas: ISI, SCOPUS