The existing framework describing the mechanical properties of lattices places strong emphasis on one important property, the relative density of the repeating cells. In this work, we explore the eﬀects of cell size, attempting to construct more complete models for the performance of lattices. This was achieved by examining the elastic modulus and ultimate tensile strength of latticed parts with a range of unit cell sizes and ﬁxed density. The parts were produced by selective laser melting (SLM). The examined cell type was body-centred-cubic (BCC), a cell of high relevance for SLM because of its self-supporting structure. We obtained power law relationships for the mechanical properties of our latticed specimens as a function of cell size, which are similar in form to the existing laws for the density dependence. These can be used to predict the properties of latticed column structures comprised of BCC cells, and may be easily amended for other situations. In addition, we propose a novel way to analyse the elastic modulus data, which may lead to more general models, applicable to parts of varying size. Lastly, our general methodology may be of use in future studies which explore the other parameters that determine lattice performance; the choice of cell type, the global shape of the lattice structure and the type of stress.
|Title of host publication||25th Solid Free Form Symposium|
|Place of Publication||University of Texas, Austin|
|Publisher||University of Texas at Austin|
|Number of pages||4|
|Publication status||Published - 2014|
|Event||The Twenty-Fifth Annual International Solid Freeform Fabrication Symposium - Austin, United States|
Duration: 4 Aug 2014 → 6 Aug 2014
Conference number: 25
|Conference||The Twenty-Fifth Annual International Solid Freeform Fabrication Symposium|
|Period||4/08/14 → 6/08/14|
Bibliographical noteManuscripts for this and all preceding SFF Symposia are available for free download at the conference website:
- selective laser melting
- aluminium alloy
Maskery, I., Aremu, A., Simonelli, M., Tuck, C., WIldman, R., Ashcroft, I., & Hague, R. (2014). The BCC unit cell for latticed SLM parts; mechanical properties as a function of cell size. In 25th Solid Free Form Symposium (pp. 688-701). University of Texas, Austin: University of Texas at Austin.