Onset of irreversibility in cyclic shear of granular packings.
Phys Rev E Stat Nonlin Soft Matter Phys
; 85(2 Pt 1): 021309, 2012 Feb.
Article
em En
| MEDLINE
| ID: mdl-22463204
ABSTRACT
We investigate the onset of irreversibility in a dense granular medium subjected to cyclic shear in a split-bottom geometry. To probe the micro- and mesoscale, we image bead trajectories in three dimensions throughout a series of shear strain oscillations. Although beads lose and regain contact with neighbors during a cycle, the global topology of the contact network exhibits reversible properties for low oscillation amplitudes. With increasing reversal amplitude, a transition to an irreversible diffusive regime occurs.
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Base de dados:
MEDLINE
Assunto principal:
Termodinâmica
/
Modelos Moleculares
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Coloides
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Modelos Químicos
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article