Confined Comminution and Particle Flow: A General Model for Large-Scale Canonical Solutions

Stress flow analysis of bio-structures using the finite element method and the flow network approach

RR Patel, D Valles, GA Riveros, DS Thompson, EJ Perkins, JJ Hoover, JF Peters, A Tordesillas

2018-12-01

Bio-structures have been optimized by nature to possess remarkable resiliency and strength yet retain a light-weight composition. ..

A data-driven complex systems approach to early prediction of landslides

A Tordesillas, Z Zhou, R Batterham

2018-09-01

Landslides are a common natural disaster that claims countless lives and causes huge devastation to infrastructure and the environ..

A computational geometry approach to pore network construction for granular packings

JH van der Linden, A Sufian, GA Narsilio, AR Russell, A Tordesillas

2018-03-01

Pore network construction provides the ability to characterize and study the pore space of inhomogeneous and geometrically complex..

Of cuts and cracks: Data analytics on constrained graphs for early prediction of failure in cementitious materials

S Kahagalage, A Tordesillas, M Nitka, J Tejchman

2017-06-30

Using data from discrete element simulations, we develop a data analytics approach using network flow theory to study force transm..

Powder keg divisions in the critical state regime: Transition from continuous to explosive percolation

Z Zhou, A Tordesillas

2017-06-30

The underlying microstructure and dynamics of a dense granular material as it evolves towards the "critical state", a limit state ..

Self-organization in the localised failure regime: Metastable attractors and their implications on force chain functionality

S Pucilowski, A Tordesillas, G Froyland

2017-06-30

In transitive metastable chaotic dynamical systems, there are no invariant neighbourhoods in the phase space. The best that one ca..

A model of granular materials partially cemented by bacterial calcite

E Kashizadeh, A Mukherjee, A Tordesillas

2017-01-01

Nature aggregates granular materials such as sand, silt and clay into form beach rocks, anthills and other forms of microbialites...

Spatial Connectivity of Force Chains in a Simple Shear 3D Simulation Exhibiting Shear Bands

David M Walker, Antoinette Tordesillas, Matthew R Kuhn

2017-01-01

Force chains within a granular material are the major load carriers responsible for the strength of a material. The authors study ..

Testing Occam's razor to characterize high-order connectivity in pore networks of granular media: Feature selection in machine learning

J Van Der Linden, A Tordesillas, G Narsilio

2017-01-01

© The Authors, published by EDP Sciences, 2017. A perennial challenge for the characterization and modelling of phenomena involvin..

Machine learning framework for analysis of transport through complex networks in porous, granular media: A focus on permeability

JH Van Der Linden, GA Narsilio, A Tordesillas

2016-08-17

We present a data-driven framework to study the relationship between fluid flow at the macroscale and the internal pore structure,..

Granular vortices: Identification, characterization and conditions for the localization of deformation

A Tordesillas, S Pucilowski, Q Lin, JF Peters, RP Behringer

2016-05-01

We relate the micromechanics of vortex evolution to that of force chain buckling and, on this basis, formulate the conditions for ..

A characterization of the coupled evolution of grain fabric and pore space using complex networks: Pore connectivity and optimized flows in the presence of shear bands

S Russell, DM Walker, A Tordesillas

2016-03-01

A framework for the multiscale characterization of the coupled evolution of the solid grain fabric and its associated pore space i..

Network flow model of force transmission in unbonded and bonded granular media

A Tordesillas, ST Tobin, M Cil, K Alshibli, RP Behringer

2015-06-08

An established aspect of force transmission in quasistatic deformation of granular media is the existence of a dual network of str..

Shear bands as bottlenecks in force transmission

A Tordesillas, S Pucilowski, S Tobin, MR Kuhn, E Andò, G Viggiani, A Druckrey, K Alshibli

2015-06-01

The formation of shear bands is a key attribute of degradation and failure in soil, rocks, and many other forms of amorphous and c..

Evolution of mesoscopic granular clusters in comminution systems: a structural mechanics model of grain breakage and force chain buckling

A Tordesillas, E Liu

2015-01-01

A major scientific challenge in establishing a micromechanics theory for complex materials is the characterisation and modelling o..

Micromechanical analysis of second order work in granular media

F Nicot, N Hadda, F Bourrier, L Sibille, A Tordesillas, F Darve

2015-01-01

This paper examines the evolution of instabilities in granular materials from a microscopic point of view, using the discrete elem..

Multiscale resolution of networks of granular media network evolution—a network of networks

David M Walker, Antoinette Tordesillas, Amy L Rechenmacher, Michael Small

2014-03-17

A complex systems analysis of stick-slip dynamics of a laboratory fault

David M Walker, Antoinette Tordesillas, Michael Small, Robert P Behringer, Chi K Tse

2014-03-01

We study the stick-slip behavior of a granular bed of photoelastic disks sheared by a rough slider pulled along the surface. Time ..

Transmission of kinematic information in dense granular systems: Local and nonlocal network sensing

DM Walker, A Tordesillas, AL Rechenmacher

2013-10-01

We study how kinematic information propagates in plane strain compression tests for two granular samples, one comprising glass bea..

A nonlinear dynamical systems modelling approach unveils chaotic dynamics in simulations of large strain behaviour of a granular material under biaxial compression

M Small, D Walker, A Tordesillas

2013-08-01

We consider bulk measurements of shear stress in a discrete element simulation of biaxial compression of a densely packed granular..

Length scales from elastic buckling of a force chain under confined axial compression

A Tordesillas, D Carey, J Shi

2013-08-01

In a deforming densely packed granular material, the columnar force chains carry the majority of the load, while the surrounding w..

Unitary stick-slip motion in granular beds

JE Hilton, PW Cleary, A Tordesillas

2013-08-01

The dynamics of granular beds subject to applied stresses are often characterised by repeated cycles of stick-slip motion. The exa..

Revisiting localized deformation in sand with complex systems

A Tordesillas, DM Walker, E Andò, G Viggiani

2013-04-08

Complex systems techniques are used to analyse X-ray micro-CT measurements of grain kinematics in Hostun sand under triaxial compr..

Characterizing chaotic dynamics from simulations of large strain behavior of a granular material under biaxial compression

M Small, DM Walker, A Tordesillas, CK Tse

2013-03-18

For a given observed time series, it is still a rather difficult problem to provide a useful and compelling description of the und..

Directed network topologies of smart grain sensors

DM Walker, A Tordesillas, T Nakamura, T Tanizawa

2013-03-11

We employ a recent technique for building complex networks from time series data to construct a directed network embodying time st..

Multiscale characterisation of diffuse granular failure

A Tordesillas, S Pucilowski, L Sibille, F Nicot, F Darve

2012-12-21

We study the evolution of structure inside a deforming, cohesionless granular material undergoing failure in the absence of strain..

Isostaticity in Cosserat continuum

A Tordesillas, J Shi, JF Peters

2012-04-01

Under conditions of isostaticity in granular media, the contact forces for all particles are statically determinate and forces can..

Taxonomy of granular rheology from grain property networks

DM Walker, A Tordesillas

2012-01-11

We construct complex networks from symbolic time series of particle properties within a dense quasistatically deforming granular a..

Complex networks in confined comminution

DM Walker, A Tordesillas, I Einav, M Small

2011-08-08

The physical process of confined comminution is investigated within the framework of complex networks. We first characterize the t..

Percolating contact subnetworks on the edge of isostaticity

DM Walker, A Tordesillas, C Thornton, RP Behringer, J Zhang, JF Peters

2011-06-01

We search for a percolating, strong subnetwork of contacts in a quasi-statically deforming, frictional granular material. Of speci..

Deciphering D’Alemberts dream: New tools for uncovering rules for self-organized pattern formation in geomaterials

A Tordesillas, DM Walker

2011-01-01

Techniques from Complex Networks are used to study the evolving topology and functional connectivity in various granular systems i..

Discovering community structures and dynamical networks from grain-scale kinematics of shear bands in sand

A Tordesillas, DM Walker, AL Rechenmacher, S Abedi

2011-01-01

The quest to understand the connections between the triumvirate of structure, dynamics and function continues to drive the forefro..

Evolution of functional connectivity in contact and force chain networks: Feature vectors, k-cores and minimal cycles

A Tordesillas, P O'Sullivan, DM Walker, null Paramitha

2010-10-01

We analyze the rheological response, i.e., fabric and contact force evolution, of dense granular materials from a complex networks..

Force attractor in confined comminution of granular materials

O Ben-Nun, I Einav, A Tordesillas

2010-03-08

We reveal a novel attractor in the space of contact forces that bounds the behavior of granular materials during confined comminut..

The frictionless rolling contact of a rigid circular cylinder on a semi-infinite granular material

A Tordesillas, J Shi

2000-01-01

The resulting flow and deformation of a semi-infinite granular material under a rolling, smooth rigid circular cylinder is investi..

Fractional indentation of dilatant granular materials

A Tordesillas, J Shi

1999-01-01

The frictional indentation of a semi-infinite dilatant granular mass is examined assuming plane strain conditions. Complete soluti..

Velocity field for the punch problem for dilatant granular materials

JM Hill, J Shi, A Tordesillas, YH Wu

1999-01-01

For the problem of indentation of a granular half-space by a smooth rigid punch, an alternative velocity field is obtained for she..

The use of the dimensionless Womersley number to characterize the unsteady nature of internal flow

C Loudon, A Tordesillas

1998-03-07

Dimensionless numbers are very useful in characterizing mechanical behavior because their magnitude can often be interpreted as th..

Indentation of a double shearing dilatant granular material by a smooth rigid wedge

A Tordesillas, J Shi

1998-01-01

Presented herein is a complete solution to the normal plane strain indentation of a double shearing dilatant granular material by ..

The symmetrical adhesive contact problem for circular elastic cylinders

JM Hill, AA Tordesillas

1992-01-01

The rolling contact problem involving circular cylinders is at the heart of numerous industrial processes, and critical to any ela..

Three-dimensional frictionless contact between layered elastic bodies and incorporating sharp edges

AA Tordesillas, JM Hill

1991-07-01

The roller coating system used in industry to apply paint to sheet metal involves two contacting rolling cylinders, one of which i..

The pressure distribution for symmetrical contact of circular elastic cylinders

JM Hill, A Tordesillas

1989-11-01

In many industrial processes involving rolling cylinders in contact, knowledge of the contact pressure in the nip region is often ..