Arbitrary Lagrangian-Eulerian simulation of powder compaction processes
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In this paper, a new strategy for the simulation of quasi-static cold compaction processes of powders is presented. A material model formulated within the framework of isotropic finite strain multiplicative hyperelastoplasticity is used. An elliptic plastic model expressed in terms of the Kirchhoff stresses and the relative density models the transition between the loose powder and the compacted sample. The Coulomb dry friction model is used to capture friction effects at powder-die contact. Excessive distortion of Lagrangian meshes due to large mass fluxes is usual in powder compaction problems. Moreover, Lagrangian approaches cannot deal properly with mass fluxes around sharp corners. For these reasons, an Arbitrary Lagrangian-Eulerian (ALE) formulation is used here. The present results illustrate that this approach allows simulating highly demanding powder compaction processes without mesh distortion and spurious oscillations in the results. Moreover, it is shown that the mass conservation principle is verified with a low relative error.
CitationPérez-Foguet, A.; Rodriguez, A.; Huerta, A. Arbitrary Lagrangian-Eulerian simulation of powder compaction processes. "The international journal of forming processes", Desembre 2001, vol. 4, núm. 3-4, p. 535-549.