** **Tutors: Andrei Gheorghe, Georg Grasser, Kadri Tamre, Thibault Schwartz.
Participating students: Lu Jiaxing, Rhina Portillo, Matthias Urschler, Maria Valente, Yi Lin Vincent, Matea Ban
The Robotic Infiltrations workshop was a collaboration between the University of Innsbruck’s REXILAB and the Institute of Architecture at the University of Applied Arts Vienna, and represents a continuation of research that explores the potential of additive digital production through the use of robotically controlled placement of phase-change polymers in the production of full scale structures.
The “ARCHITECTURE CHALLENGE” program is an international design workshop series in collaboration with international experts and institutions. It is intended for architecture students interested in exploring integrated digital design and fabrication while simultaneously designing a full-scale built project within the teaching environment of the Institute of Architecture at the University of Applied Arts in Vienna. Architectural Design at “Die Angewandte” is taught as an integrated, multidisciplinary process. Following this tradi-4ion, the design process in the workshop was enriched with robotic design strategies combining Grasshopper plugins such as the HAL and KARAMBA platforms. Specialists from Bollinger + Grohmann Engineers and invited guest experts Georg Grasser, Kadri Tamre and Thibault Schwartz from Technical University Innsbruck co- tutored the workshop. The handling of virtual simulation methods and the engineering of full-scale structures using robotic manufacturing were a pri—nary focus of the workshop. Three ABB industrial robots from REXILAB were used for on-site fabrication.
Structural Performance Structural testing of PU foam mockups revealed a strong tension ability of the expanded material. Supporting points on the floor and suspension point on a moveable rack were defined locally taking into account the architectural site context. Possible connection lines between these points were optimized for internal bending moments using the structural plugin Karamba in combination with the genetic algorithm Galapagos.
Intrinsic Material Qualities The geometrically accurately defined design strategy reacts with loosely defined material behavior. The precise abilities of the robots correlate with the very uncertain geometrical condition entailing from the foam expansion process. This intuitive material behavior enriches the digital precision resulting in artifacts of one - time unique aesthetic design results. Experimental and final production of the structure merge in one single fabrication process.
A Grasshopper Definition was developed to extract 4-point nodes and 2-point connections from the final design network. HAL was used to compute specific tool paths for the three robots. A specific material mixture (PUfoam,gypsum,waterandhardener) developed at TU Innsbruck combined with precise time management was required to produce the structural nodes.