Computational plasticity algorithm for particle dynamics simulations

A.V. Lyamin, C. Vignes, K. Krabbenhoft
Computational Particle Mechanics
computational plasticity, Contact Dynamics

The problem of particle dynamics simulation is interpreted in the framework of computational plasticity leading to an algorithm which is mathematically indistinguishable from the common implicit scheme widely used in the finite element analysis of elastoplastic boundary value problems.

This algorithm provides somewhat of a unification of two particle methods, the discrete element method and the contact dynamics method, which usually are thought of as being quite disparate. In particular, it is shown that the former appears as the special case where the time stepping is explicit while the use of implicit time stepping leads to the kind of schemes usually labelled contact dynamics methods.

The framing of particle dynamics simulation within computational plasticity paves the way for new approaches similar (or identical) to those frequently employed in nonlinear finite element analysis. These include mixed implicit–explicit time stepping, dynamic relaxation and domain decomposition schemes.

Keywords: contact dynamics, computational plasticity.

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