Reprinting Intelligence: An Exhibit at the World Economics Forum 2018 
 Chen, T., Jung-Chew Tse & Shea, K., (2018), ETH, Davos, WEF 2018
Art installations often refer to three-dimensional works of a sufficient volume and mass that they present non-trivial loading conditions. They may also engage in a level of interactivity with the viewers. Large scale installations are typically either simple in construction, or extremely time intensive to make. From the perspective of mechanical engineering, we detail the computational design and fabrication of a 3D printed brain model that functions as the basis for an augmented reality application. The design requirements are that the brain has a minimum volume of 550x400x300mm and that it must have a non-reflective surface. A stem is designed to provide structural support for the brain. The stem is generated using a set of L-system rules that mimic the pattern of a biological neural network. The resulting frame network is optimized for displacement and stress, with cross sectional size as the optimization variable. The combined geometry of the optimized stem and the brain are segmented in 11 parts to be fabricated separately using Fused Filament Fabrication with Polycarbonate. The parts are assembled using a combination of metallic pins and permanent magnets. The total fabrication time is 22 days, and the final design weighs 5.8 kg. This design process demonstrates a simple way to incorporate aesthetics in the computational design of a functional product. Through segmentation and assembly, it shows the feasibility of printing relatively large scale art installations using a commercial 3D printer with sub-millimeter resolution. With this example, we hope this design process may be adopted by designers and engineers alike.