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Shape-variable seals for pressure actuated cellular structures

Gramüller, Benjamin and Tempel, Alfred and Hühne, Christian (2015) Shape-variable seals for pressure actuated cellular structures. Smart Materials and Structures, 24 (8). Institute of Physics (IOP) Publishing. ISSN 0964-1726.

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Sealing concepts allowing a large change of cross-sectional area are investigated. Shape variable seals are indispensable for the biologically inspired pressure actuated cellular structures (PACS), which can be utilized to develop energy efficient, lightweight and adaptive structures for diverse applications. The requirements regarding extensibility, stiffness and load capacity exceed the characteristics of state of the art solutions. This work focuses on the design of seals suitable for extensional deformations greater than 25 %. In a first step, a number of concepts are generated. Then the most suitable concept is chosen based on numerical characterization and experimental examination. The deformation supportive end cap (DSEC) yields satisfying results as it displays a stress optimized shape under maximum load, an energetically inexpensive bending-based deformation mechanism and utilizes the applied forces to support distortion. In the first real-life implementation of a double row PACS demonstrator, which contains DSEC, the proof of concept is demonstrated.

Item URL in elib:https://elib.dlr.de/97392/
Document Type:Article
Title:Shape-variable seals for pressure actuated cellular structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gramüller, Benjaminbenjamin.gramueller (at) dlr.deUNSPECIFIED
Tempel, Alfredalfred.tempel (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:31 July 2015
Journal or Publication Title:Smart Materials and Structures
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Institute of Physics (IOP) Publishing
Keywords:PACS, sealing, shape variable, morphing, pressure, cellular, isotensoid
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Gramüller, Benjamin
Deposited On:21 Jul 2015 14:56
Last Modified:31 Jul 2019 19:54

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