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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 1    September 2009

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Densification simulation of compacted Al powders using multi-particle finite element method
Kyung-Hun LEE, Jung-Min LEE, Byung-Min KIM

School of Mechanical Engineering, Pusan National University, Pusan, Korea

Abstract:The powder compaction simulations were performed to demonstrate deformation behavior of particles and estimate the effect of different punch speeds and particle diameters on the relative density of powder by a multi-particle finite element model(MPFEM). Individual particle discretized with a finite element mesh allows for a full description of the contact mechanics. In order to verify the reliability of compaction simulation by MPFEM, the compaction tests of porous aluminum with average particle size of 20 μm and 3 μm were performed at different ram speeds of 5, 15, 30 and 60 mm/min by MTS servo-hydraulic tester. The results show that the slow ram speed is of great advantage for powder densification in low compaction force due to sufficient particle rearrangement and compaction force increases with decrease in average particle size of aluminum.

 

Key words: cold compaction; Al powder; particle size; multi-particle finite element model

ISSN 1672-7029
CN 43-1423/U

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