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HYBRID SKIN DESIGN OF THE TRANSITION REGION BETWEEN MORPHING WING AND FIXED WING

Radestock, Martin and Falken, Alexander and Riemenschneider, Johannes and Kintscher, Markus (2018) HYBRID SKIN DESIGN OF THE TRANSITION REGION BETWEEN MORPHING WING AND FIXED WING. In: ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2018. Conference on Smart Materials, Adaptive Structures and Intelligent Systems SMASIS2018, 10. - 12. Sep. 2018, San Antonio, Tx, USA. DOI: 10.1115/SMASIS2018-7976 ISBN 978-0-7918-5194-4

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Abstract

The adaptation of a wing contour is important for most aircraft, because of the different flight states. That's why an enormous number of mechanisms exists and reaches from conventional slats and flaps to morphing mechanisms, which are integrated in the wing. Especially integrated mechanisms reduce the number of gaps at the wing skin and produce less turbulent flow. However these concepts are located at a certain section of the wing. This leads to morphing and fixed wing sections, which are located next to each other. Commonly, the transition between these sections is not designed or a wing fence is used. If the transition is not designed, the wing has a step with an activated morphing mechanism and that produces additional vortices. A new skin design will be presented in order to smooth the contour between a fixed wing and a morphing wing. Here the transition between a droop nose and a fixed wing is considered. The skin material is a mix of ethylene propylene diene monomer rubber and glass-fiber reinforced plastic. The rubber is the baseline material, while the glass- fiber is added as stripes in chord-wise direction. In span-wise direction the glass fiber is connected with the rubber. The rubber carries the loads in span-wise direction and reduces the required actuation force. The glass fiber stiffens the skin locally in chord wise direction and keeps the basic contour of the skin. Some geometrical parameters within the skin layup can be varied to change the transition along the span or to reduce the maximum strain within the skin. The local strain maximum is a result of the material transition with different modules. One design of a leading edge was manufactured with an existing mold and it has a span of 200 mm. There are two essential aspects from a structural point of view. One is a nearly continuous deformation along the span and the second is the maximum strain in the rubber. Both aspects are investigated in an experiment and the results are compared with a simulation model. The results show a reliable concept and its numerical model, which will be assigned to a full scale demonstrator. This demonstrator will have a span of 1000 mm and will show the smooth skin transition between a droop nose and a fixed wing.

Item URL in elib:https://elib.dlr.de/122030/
Document Type:Conference or Workshop Item (Speech)
Title:HYBRID SKIN DESIGN OF THE TRANSITION REGION BETWEEN MORPHING WING AND FIXED WING
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Radestock, MartinInstitut für Faserverbundleichtbau und Adaptronik - Adaptronikhttps://orcid.org/0000-0002-9918-3315
Falken, AlexanderInvent GmbhUNSPECIFIED
Riemenschneider, JohannesInstitut für Faserverbundleichtbau und Adaptronik - Adaptronikhttps://orcid.org/0000-0001-5485-8326
Kintscher, Markusmarkus.kintscher (at) dlr.dehttps://orcid.org/0000-0003-0600-0135
Date:2018
Journal or Publication Title:ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1115/SMASIS2018-7976
ISBN:978-0-7918-5194-4
Status:Published
Keywords:elastic skin, morphing wing, elastomer skin with glassfiber, skin transition
Event Title:Conference on Smart Materials, Adaptive Structures and Intelligent Systems SMASIS2018
Event Location:San Antonio, Tx, USA
Event Type:international Conference
Event Dates:10. - 12. Sep. 2018
Organizer:The American Society of Mechanical Engineers
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 - Concepts and Integration
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Radestock, Martin
Deposited On:22 Oct 2018 13:13
Last Modified:15 Sep 2019 03:00

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