Details

Autor(en) / Beteiligte

• Tanlak, Niyazi
• De Lange, Dirk Frederik
• Van Paepegem, Wim

Titel

Numerical prediction of the printable density range of lattice structures for additive manufacturing

Ist Teil von

• Materials & design, 2017-11, Vol.133, p.549-558

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Structured cellular structures are nowadays printed using additive manufacturing methods like powder bed fusion. The relative density of the cellular structures has a big role in the suitability of a lattice for printing due to the minimum printable radius constraint and powder being trapped inside an inclusion. In this work, the theoretical limits of the printable range of relative density of different lattice types are found based on the cell size using computer methods by leaving other process parameters for further research as the current parameters are the most basic ones. The results are approximated using simple polynomials to enable practical usage. [Display omitted] •Even if ideal conditions are assumed, there is a maximum printable density limit for lattices being fabricated with powder bed fusion.•When lattice size increases, the printable range widens and approaches to ideal conditions while it gets narrower when the powder lump size increase and the machine precision exacerbates.•The powder adhesion and the problems due to strut inclination can also be modeled with powder size.•The printable density range in working conditions will be narrower than the ones found in this work.•Finding optimized process parameters or the advancement of technology will approach the real limits to the ones found in this paper.