Powder compaction modelling via the discrete and finite element method

✍ Scribed by R.S Ransing; D.T Gethin; A.R Khoei; P Mosbah; R.W Lewis

• Publisher: Elsevier Science
• Year: 2000
• Weight: 1005 KB
• Volume: 21
• Category: Article
• ISSN: 0261-3069
• DOI: 10.1016/s0261-3069(99)00081-3

✦ Synopsis

A discrete and continuum modelling approach to powder compaction is presented and discussed. The work demonstrates the ability of the discrete method to capture the compression of a ductile matrix and a matrix comprising a ductile and brittle assembly. The discrete element analysis is compared with a Gurson model for the compression of a ductile porous system with reasonable agreement. A continuum model is demonstrated by comparison with results from an experimental study and other numerical investigations. For a steel powder, this displays agreement in predicted density within 0.23 grcm 3 and upper punch force level within 16%. These levels of agreement are encouraging and are within the requirements to be useful for industrial application. Similar good agreement is also demonstrated when compared with a simulation of the pressing of a ceramic tip which features extreme changes in density throughout the compact.