About contacts of adhesive, elasto-plastic, frictional powders,

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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
Original languageEnglish
Title of host publicationNew Trends in Contact Mechanics
Place of PublicationCargese, Corsica
Number of pages4
Publication statusPublished - 27 Mar 2012
EventEuromech 514: New Trends in Contact Mechanics - Cargese, Corsica, Cargese, Corsica
Duration: 27 Mar 201231 Mar 2012

Publication series



ConferenceEuromech 514
CityCargese, Corsica
Other2012-03-27 - 2012-03-31


  • METIS-294190
  • IR-80394


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