Effect of particle size distribution at powder compaction

• The Discrete Element Method (DEM) has been used to investigate the effects of particle size distribution during closed die compaction of powders. In the simulations, the effect of considering rotational degrees of freedom in the analysis is studied. Both loading and unloading of the powder compound is investigated and the particle size distribution is assumed to be a truncated normal distribution. The powder particles are assumed rigid plastic in compression and following Hertz elastic contact law during unloading. From a convergence study, it was found that 4000 particles were sufficient to represent the global properties of the powder compact. Among other things, the results show that when the size of the particles does not deviate considerably from the average size, the effect on global compaction properties is basically negligible.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

Nyckelord

Closed die compaction

Discrete element modelling

Powder

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)