2020-10-26T19:16:22Z
http://oa.upm.es/cgi/oai2
oai:oa.upm.es:29787
2016-04-22T00:10:34Z
7374617475733D707562
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Statistical distributions obtained from the compression of monodisperse, soft and frictionless particles
González Tejada, Ignacio
Jimenez Rodriguez, Rafael
Civil Engineering and Construction
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.
E.T.S.I. Caminos, Canales y Puertos (UPM)
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
2013
info:eu-repo/semantics/conferenceObject
Presentation at Congress or Conference
Proceedings of the III international Conference on Particle based Methods Fundamentals and Applications (Particles 2013) Stuttgart, Germany 18-20 September 2013 | III International Conference on Particle-Based Methods. Fundamentals and Applications, Particles 2013 | 18/09/2013 - 20/09/2013 | Stuttgart, Germany
PeerReviewed
application/pdf
eng
http://congress.cimne.com/particles2013
info:eu-repo/semantics/openAccess
http://oa.upm.es/29787/