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SUMMARY:Computational Design of Robust Elastic Metamaterials and Deployabl
 e Structures - Julian Panetta (EPFL - Ecole Polytechnique Fédérale de La
 usanne)
DTSTART:20190613T123000Z
DTEND:20190613T133000Z
UID:TALK125938@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:My talk will present some computational design tools targeting
  various classes of structures and fabrication technologies. In the first 
 half\, I will present a method for designing elastic metamaterials that ca
 n be fabricated with consumer-level single material 3D printers to achieve
  custom deformation behaviors. These metamaterials cover a wide range of e
 lastic properties and are optimized for robustness in generic use\, experi
 encing minimal stresses under the worst-case load. Our coarse-scale design
  optimization can then automatically assign these metamaterials to an inpu
 t geometry so that the printed object undergoes a user-specified deformati
 on under applied loads. In the second half\, I will introduce a new class 
 of deployable elastic gridshell structures. These structures consist of fl
 at\, conveniently assembled layouts of elastic beams coupled by rotational
  joints that can be deployed to programmed 3D curved shapes by a simple ex
 pansive actuation. During deployment\, the coupling imposed by the joints 
 forces the beams to twist and buckle out of plane\, allowing interesting 3
 D forms to emerge. However the simulation and optimization of these struct
 ures is challenging\, especially due to the frequent unstable equilibria e
 ncountered in the deployment path\; I will discuss the efficient algorithm
 s we have developed to assist the design of these structures. This talk is
  based on joint work with Denis Zorin\, Mark Pauly\, and Florin Isvoranu.
LOCATION:Seminar Room 1\, Newton Institute
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