J. Phys. IV France 11 (2001) Pr4-339-Pr4-347
Shear band instabilities in compacted metal powder with or without interparticle cohesionV. Tvergaard and P. Redanz
Department of Mechanical Engineering, Solid Mechanics, Technical University of Denmark, 2800 Lyngby, Denmark
A simple model for analysis of shear band development in uniformly strained solids is used to study the possibility of flow localization during metal powder compaction. Earlier analyses for a metal powder with full interparticle cohesion have predicted no localization. Here, a material model is used, in which the value of a cohesion factor is used to represent either cohesionless powder or powder with a certain amount of cohesion. It is found that localization under compaction depends strongly on the cohesion factor, the stress state, and the magnitude of an initial imperfection.
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