The effect of contact torques on porosity of cohesive powders

2004/03/03 by Guido Bartels, Tamás Unger, Tamas Unger +4 · 2 citations
Engineering · Physics and Astronomy · #Advanced materials and composites #Granular flow and fluidized beds #Powder Metallurgy Techniques and Materials #cond-mat.soft #cond-mat.stat-mech

paper · pdf · doi:10.1007/s10035-004-0184-8

published as Granular Matter, Volume 7, Numbers 2-3, 2005, Pages 139 - 143 · 5 pages, 5 figures

arxiv created 2004/03/03 · openalex publication_date 2005/02/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The porosity of uniaxially compacted cohesive powders depends on the applied stress (including gravity). The case, where these stresses are weak, is considered. The compaction results in a porosity which is a function of sliding, rolling and torsion friction. By contact dynamics simulations it is shown that the influences of contact torques (static rolling and torsion friction) on the porosity are significant and approximately additive. The relevance for nano-powder pressure sintering is discussed.

Citations

• A Micromechanical Description of Granular Material Behavior

Cited by

• Computer simulation of model cohesive powders: Plastic consolidation, structural changes, and elasticity under isotropic loads
• Computer simulation of model cohesive powders: Influence of assembling procedure and contact laws on low consolidation states