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 language | English |
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Pages (from-to) | 715-724 |
Number of pages | 9 |
Journal | International Journal of Mechanical Sciences |
Volume | 43 |
DOIs | |
Publication status | Published - 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