School Seminars and Colloquia

Micromechanics of force chain evolution in dense granular assemblies: a focus on stick-slip in granular systems

School Seminar

by Maya Muthuswamy


Institution: The University of Melbourne
Date: Tue 6th May 2008
Time: 12:00 PM
Location: Russell Love Theatre, Richard Berry Bldg, Uni of Melbourne

Abstract: This thesis presents an analysis of force transmission in densely
packed granular assemblies. The main objectives are twofold.
The first is a quantitative characterisation of force transmission on
the mesoscopic scale, with a particular focus on the emergent
phenomenon of 'force chains".
Force chains are the main pathways of force propagation through a
densely packed granular material, and are complex,
highly ramified networks that undergo rapid changes in branch morphology
over a material's deformation history.
To gain a full understanding of the force chain network, and the
interplay between it and its surrounding weak particle network, we
examined the evolution of both these networks from two perspectives:
kinetics (properties of individual force chains and the force
chain network as a whole) as well as kinematics (strain, curvature, nonaffine
deformation).
The second objective is to directly model these structures, in order to be able
to predict their response under various conditions. A series of three
models is conceived.

For More Information: Contact: Paul Pearce (P.Pearce@ms.unimelb.edu.au) or Paul Norbury (pnorbury@ms.unimelb.edu.au)