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Development of Everting Tubular Net Structures Using Simulation for Growing Structures

: Boxberger, Lukas; Weisheit, Linda; Hensel, Sebastian; Schellnock, Julia; Mattheß, Danilo; Riedel, Frank; Drossel, Welf-Guntram

Fulltext ()

Applied Sciences 10 (2020), No.18, Art. 6466, 17 pp.
ISSN: 2076-3417
Journal Article, Electronic Publication
Fraunhofer IWU ()
everting structure; net structure; net tube; additive manufacturing of elastomer; modeling; parameter estimation; numerical simulation

Many living beings show the ability and necessity to develop invertible, tubular structures to enable additional functions temporarily. The biological archetypes always demonstrate a high change of volume of the structure between an inactive and active state. This makes the principle interesting for many technical applications, where a certain geometry or an additional volume has to be generated situationally for a task and can only be accepted temporarily, for example, in minimally invasive robotics. A possibility was sought to transfer the archetype into the technical context and to evaluate geometric-constructive dependencies based on an inversion of the structure. The result is a practicable design for repeatedly invertible net structures, which can be used for products with temporary additional functions and volumes.