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Memorias de investigación
Ponencias en congresos:
Representing microstates of static granular matter in a stress phase space
Año:2013
Áreas de investigación
  • Física química y matemáticas,
  • Ingenieria civil
Datos
Descripción
A stress phase space is proposed to compare the static packings of a granular system (microstates) that are compatible to a macrostate described by external stresses. The equivalent stress of each particle of a static packing can be obtained from the mechanical interaction forces, and the associated volume is given by the respective Voronoi cell. Therefore, particles can be located at different stress levels and grouped into categories or configurations, which are defined in base of the geometrical features of the local arrangement (in particular, of the number of forces that keep them force-balanced). They can be represented as points in a stress phase space. The nature of this space is analyzed in detail. The integration limits of the stress variables that avoid or limit tensile states and the capability of each configuration to represent specific stress states establish its main features. Furthermore, if some stress variables are used, instead of the usual components of the Cauchy stress tensor, then some symmetries can be found. Results obtained from molecular dynamics simulations are used to check this nature. Finally, some statistical ensembles are written in terms of the coordinates of this phase space. These require some assumptions that are made in base on continuum mechanics principles.
Internacional
Si
Nombre congreso
7th International Discussion Meeting on Relaxations in Complex Systems [Proceedings en https://mie.esab.upc.es/7idmrcs/7IDMRCS%20Proceedings_jul26.pdf]
Tipo de participación
960
Lugar del congreso
Barcelona
Revisores
Si
ISBN o ISSN
CDP08UPM
DOI
Fecha inicio congreso
21/07/2013
Fecha fin congreso
26/07/2013
Desde la página
150
Hasta la página
150
Título de las actas
7th International Discussion Meeting on Relaxations in Complex Systems New results, Directions and Opportunities. Book of abstracts.
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Ignacio Gonzalez Tejada (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Mecánica de Rocas
  • Departamento: Ingeniería y Morfología del Terreno
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