Understanding multi-scale structural evolution in granular systems through gMEMS

David M. Walker, A Tordesillas

Research output: Chapter in Book/Conference paperConference paper

2 Citations (Scopus)

Abstract

We show how the rheological response of a material to applied loads can be systematically coded, analyzed and succinctly summarized, according to an individual grain’s property (e.g. kinematics). Individual grains are considered as their own smart sensor akin to microelectromechanical systems (e.g. gyroscopes, accelerometers), each capable of recognizing their evolving role within self-organizing building block structures (e.g. contact cycles and force chains). A symbolic time series is used to represent their participation in such self-assembled building blocks and a complex network summarizing their interrelationship with other grains is constructed. In particular, relationships between grain time series are determined according to the information theory Hamming distance or the metric Euclidean distance. We then use topological distance to find network communities enabling groups of grains at remote physical metric distances in the material to share a classification. In
essence grains with similar structural and functional roles at different scales are identified together. This taxonomy distills the dissipative structural rearrangements of grains down to its essential features and thus provides pointers for objective physics based internal variable formalisms used in the construction of robust predictive continuum models
Original languageEnglish
Title of host publicationPowders and Grains
Subtitle of host publicationproceedings of the 7th International Conference on Micromechanics of Granular Media : [Sydney, Australia, 8-12 July 2013]
Place of PublicationNew York
PublisherAmerican Institute of Physics
Pages145-148
Number of pages4
Volume1542
ISBN (Print)9780735411661
Publication statusPublished - 2013
Externally publishedYes
EventPOWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media - Sydney, Australia, Sydney, Australia
Duration: 8 Jul 201312 Jul 2013

Conference

ConferencePOWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media
CountryAustralia
CitySydney
Period8/07/1312/07/13

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