Statistical distributions obtained from the compression of monodisperse, soft and frictionless particles

González Tejada, Ignacio and Jimenez Rodriguez, Rafael (2013). Statistical distributions obtained from the compression of monodisperse, soft and frictionless particles. In: "III International Conference on Particle-Based Methods. Fundamentals and Applications, Particles 2013", 18/09/2013 - 20/09/2013, Stuttgart, Germany.

Description

Title: Statistical distributions obtained from the compression of monodisperse, soft and frictionless particles
Author/s:
  • González Tejada, Ignacio
  • Jimenez Rodriguez, Rafael
Item Type: Presentation at Congress or Conference (Article)
Event Title: III International Conference on Particle-Based Methods. Fundamentals and Applications, Particles 2013
Event Dates: 18/09/2013 - 20/09/2013
Event Location: Stuttgart, Germany
Title of Book: Proceedings of the III international Conference on Particle based Methods Fundamentals and Applications (Particles 2013) Stuttgart, Germany 18-20 September 2013
Date: 2013
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería y Morfología del Terreno
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The cyclic compression of several granular systems has been simulated with a molecular dynamics code. All the samples consisted of bidimensional, soft, frictionless and equal-sized particles that were initially arranged according to a squared lattice and were compressed by randomly generated irregular walls. The compression protocols can be described by some control variables (volume or external force acting on the walls) and by some dimensionless factors, that relate stiffness, density, diameter, damping ratio and water surface tension to the external forces, displacements and periods. Each protocol, that is associated to a dynamic process, results in an arrangement with its own macroscopic features: volume (or packing ratio), coordination number, and stress; and the differences between packings can be highly significant. The statistical distribution of the force-moment state of the particles (i.e. the equivalent average stress multiplied by the volume) is analyzed. In spite of the lack of a theoretical framework based on statistical mechanics specific for these protocols, it is shown how the obtained distributions of mean and relative deviatoric force-moment are. Then it is discussed on the nature of these distributions and on their relation to specific protocols.

More information

Item ID: 29787
DC Identifier: http://oa.upm.es/29787/
OAI Identifier: oai:oa.upm.es:29787
Official URL: http://congress.cimne.com/particles2013
Deposited by: Memoria Investigacion
Deposited on: 16 Sep 2014 12:27
Last Modified: 22 Apr 2016 00:10
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