Cold compaction of an array of cylindrical powder particles

I. Sridhar, N. A. Fleck, Alfred Rotimi Akisanya

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The biaxial compaction of a square array of circular cylinders is studied using slip-line field, upper bound and finite element methods. Densification is assumed to occur by plastic deformation at the contacts. It is found that contact-contact interaction has a softening effect on the local indentation pressure at each contact. The yield surfaces resulting from hydrostatic and closed-die compaction are constructed at various stages of densification: the size and shape of the yield surface depend upon the loading history and upon the relative density of the compact. The finite element predictions suggest the formation of a vertex at the loading point for the entire densification process in the case of isostatic compaction. On the other hand, a vertex at the loading point is formed only for a relative density D less than or equal to 0.85 in the case of closed-die compaction. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)715-724
Number of pages9
JournalInternational Journal of Mechanical Sciences
Volume43
DOIs
Publication statusPublished - 2001

Keywords

  • powder compaction
  • yield surface
  • slip-line field method
  • upper bound methods
  • finite element method
  • METAL-COATED FIBERS
  • YIELD BEHAVIOR
  • POWDERS
  • DENSIFICATION
  • DEFORMATION
  • PARTICLES

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