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Coupling electrical and mechanical effects in discrete element simulations
Author(s) -
Renouf M.,
Fillot N.
Publication year - 2007
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.2157
Subject(s) - discrete element method , coupling (piping) , basis (linear algebra) , element (criminal law) , finite element method , mechanical system , computer science , statistical physics , mechanics , materials science , mechanical engineering , structural engineering , physics , mathematics , engineering , geometry , political science , law
When investigating the electrical characteristics of granular assemblies under dynamical solicitations (powder, steel bead assemblies, etc.), it is difficult to distinguish between effects that are purely electrical and those that are strongly dependent on mechanical effects. Although numerous experimental works have permitted better understanding of the static electrical behaviour of such media, it is difficult to determine the effects control the multi‐physical behaviour of the medium, especially under dynamical solicitations. In the present paper, numerical investigations of the electrical characteristics of granular material are proposed. Moreover, it presents the formulation of a new model, embedded in the general scheme of discrete element methods, that couples electrical and mechanical effects and takes into account the oxidation phenomenon. Numerical simulations on the basis of experimental works are performed tovalidate the model, and the results of dynamical simulations are discussed. Copyright © 2007 John Wiley & Sons, Ltd.