Memory of jamming–multiscale models for soft and granular matter

N Kumar, S Luding - Granular Matter, 2016 - Springer
Soft, disordered, micro-structured materials are ubiquitous in nature and industry, and are
different from ordinary fluids or solids, with unusual, interesting static and flow properties …

Macroscopic model with anisotropy based on micro–macro information

N Kumar, S Luding, V Magnanimo - Acta Mechanica, 2014 - Springer
Physical experiments can characterize the elastic response of granular materials in terms of
macroscopic state variables, namely volume (packing) fraction and stress, while the …

Effects of polydispersity on the micro–macro behavior of granular assemblies under different deformation paths

N Kumar, OI Imole, V Magnanimo, S Luding - Particuology, 2014 - Elsevier
The micromechanical and macromechanical behavior of idealized granular assemblies,
made by linearly elastic, frictionless, polydisperse spheres, are studied in a periodic, triaxial …

Tuning the bulk properties of bidisperse granular mixtures by small amount of fines

N Kumar, V Magnanimo, M Ramaioli, S Luding - Powder technology, 2016 - Elsevier
We study the bulk properties of isotropic bidisperse granular mixtures using discrete element
simulations. The focus is on the influence of the size (radius) ratio of the two constituents and …

A comparative study between DEM and micropolar hypoplasticity

J Lin, W Wu - Powder Technology, 2016 - Elsevier
Both discrete-element-method (DEM) and continuum method are used to model element
tests of granular materials, including biaxial tests and simple shear tests. For the continuum …

From soft and hard particle simulations to continuum theory for granular flows

S Luding, NR Abud, T Weinhart - ALERT Geomaterials Doctoral …, 2017 - research.utwente.nl
One challenge of today's research is the realistic simulation of disordered many particle
systems in static and dynamic/flow situations. Examples are particulate and granular …

Asymmetry of the stress tenor in granular materials

J Lin, W Wu - Powder Technology, 2016 - Elsevier
One of the basic assumptions of the micropolar theory is that the stress tensor is not
symmetric. In this paper, asymmetry of the stress tensor is studied with discrete element …

Micro-Macro and jamming transition in granular materials

N Kumar - 2014 - research.utwente.nl
Granular materials are prevalent ubiquitously in nature and everyday life. They are
commonly used as raw materials in various industries; their processing, handling and …

Micro-macro and rheology in sheared granular matter

A Singh - 2014 - research.utwente.nl
Soil, made up of countless interacting grains is a perfect example of granular materials.
When soil is sheared, the flow is confined to narrow regions called flowing zones. In this …

Discrete element simulations and experiments: toward applications for cohesive powders

OI Imole - 2014 - research.utwente.nl
Granular materials are omnipresent in nature and widely used in various industries ranging
from food and pharmaceutical to agriculture and mining–among others. It has been …