TY - GEN
T1 - About contacts of adhesive, elasto-plastic, frictional powders,
AU - Luding, Stefan
N1 - Key note lecturer
PY - 2012/3/27
Y1 - 2012/3/27
N2 - Granular materials can be studied in a split-bottom ring shear cell geometry,
where they show wide shear bands under slow, quasi-static, large deformation.
The contact models are at the basis of their interesting collective behavior
and flow-rheology as well the core ingredient for the discrete element method
(DEM). The contact mechanics used involves elasto-plastic, viscous, frictional,
and torque contributions.
From a single simulation only, by applying time- and (local) space-averaging,
and focusing on the regions of the system that experienced considerable deformations,
the critical-state yield stress (termination locus) can be obtained. It is
close to linear, for non-cohesive granular materials, and nonlinear with peculiar
pressure dependence, for adhesive powders – due to the nonlinear dependence
of the contact adhesion on the confining forces.
Introduction
AB - Granular materials can be studied in a split-bottom ring shear cell geometry,
where they show wide shear bands under slow, quasi-static, large deformation.
The contact models are at the basis of their interesting collective behavior
and flow-rheology as well the core ingredient for the discrete element method
(DEM). The contact mechanics used involves elasto-plastic, viscous, frictional,
and torque contributions.
From a single simulation only, by applying time- and (local) space-averaging,
and focusing on the regions of the system that experienced considerable deformations,
the critical-state yield stress (termination locus) can be obtained. It is
close to linear, for non-cohesive granular materials, and nonlinear with peculiar
pressure dependence, for adhesive powders – due to the nonlinear dependence
of the contact adhesion on the confining forces.
Introduction
KW - METIS-294190
KW - IR-80394
M3 - Conference contribution
SP - 19
EP - 22
BT - New Trends in Contact Mechanics
PB - LMA
CY - Cargese, Corsica
T2 - Euromech 514
Y2 - 27 March 2012 through 31 March 2012
ER -