Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space

We prepare static granular beds under gravity in different stationary states by tapping the system with pulsed excitations of controlled amplitude and duration. The macroscopic state-defined by the ensemble of static configurations explored by the system tap after tap-for a given tap intensity and d...

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Detalles Bibliográficos
Autores principales: Pugnaloni, Luis Ariel, Damas, José, Zuriguel, Iker, Maza, Diego
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Exactas
static granular beds
stress tensor
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83681
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83681
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
static granular beds
stress tensor
spellingShingle Ciencias Exactas
static granular beds
stress tensor
Pugnaloni, Luis Ariel
Damas, José
Zuriguel, Iker
Maza, Diego
Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
topic_facet Ciencias Exactas
static granular beds
stress tensor
description We prepare static granular beds under gravity in different stationary states by tapping the system with pulsed excitations of controlled amplitude and duration. The macroscopic state-defined by the ensemble of static configurations explored by the system tap after tap-for a given tap intensity and duration is studied in terms of volume, V, and force moment tensor, Σ. In a previous paper [Pugnaloni et al., Phys. Rev. E 82, 050301(R) (2010)], we reported evidence supporting that such macroscopic states cannot be fully described by using only V or Σ, apart from the number of particles N. In this work, we present an analysis of the fluctuations of these variables that indicates that V and Σ may be sufficient to define the macroscopic states. Moreover, we show that only one of the invariants of Σ is necessary, since each component of Σ falls onto a master curve when plotted as a function of Tr(Σ). This implies that these granular assemblies have a common shape for the stress tensor, even though it does not correspond to the hydrostatic type. Although most results are obtained by molecular dynamics simulations, we present supporting experimental results.
format Articulo
Articulo
author Pugnaloni, Luis Ariel
Damas, José
Zuriguel, Iker
Maza, Diego
author_facet Pugnaloni, Luis Ariel
Damas, José
Zuriguel, Iker
Maza, Diego
author_sort Pugnaloni, Luis Ariel
title Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
title_short Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
title_full Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
title_fullStr Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
title_full_unstemmed Master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
title_sort master curves for the stress tensor invariants in stationary states of static granular beds: implications for the thermodynamic phase space
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/83681
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AT zurigueliker mastercurvesforthestresstensorinvariantsinstationarystatesofstaticgranularbedsimplicationsforthethermodynamicphasespace
AT mazadiego mastercurvesforthestresstensorinvariantsinstationarystatesofstaticgranularbedsimplicationsforthethermodynamicphasespace
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