Numerical Simulation of Cold Compaction of 3D Granular Packings

Yuan Chen; Didier Imbault; Pierre Dorémus

doi:10.4028/www.scientific.net/MSF.534-536.301

Paper Titles

Flow Patterns in Green Bodies Made by High-Speed Centrifugal Compaction Process
p.285

Green Body Behaviour of High Velocity Pressed Metal Powder
p.289

High Velocity Compaction : Overview of Materials, Applications and Potential
p.293

Investigation of Mechanical Properties of Powder Metallurgy Parts with Control of Microstructure
p.297

Numerical Simulation of Cold Compaction of 3D Granular Packings
p.301

Plastic Behaviour of Green Powder Metallurgical Compacts
p.305

Reduced Weight Scatter with Bonded Powder Mixes
p.309

Segregation-Free Premixes for Increased Productivity and Improved Performance
p.313

Surface Densification Coupled with Higher Density Processes Targeting High-Performance Gearing
p.317

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Numerical Simulation of Cold Compaction of 3D Granular Packings

Abstract:

During cold compaction processes loose powder is pressed under tooling action in order to produce complex shaped engineering components. Here, the analysis of the plastic deformation of granular packings is of fundamental importance to the development of computer simulation models for industrial forming processes. Powders can be idealized by packing discrete particles, where each particle is a sphere meshed with finite elements. During pressing, particles are deformed by elastic-plastic hardening where friction is present at each contact. The pressing of an isolated particle followed by a body centered cubic packing was compared with numerical prediction and experimental data. The analysis was focused on the interaction between particles and the global response expressed in force-displacement curve during compaction. The accuracy of the numerical models was also analyzed for high relative densities up to 0.95.