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Material characterization for morphing purposes in order to match flight requirements

Geier, Sebastian and Kintscher, Markus and Heintze, Olaf and Wierach, Peter and Monner, Hans Peter and Wiedemann, Martin (2012) Material characterization for morphing purposes in order to match flight requirements. SPIE Smart Structures/NDE, 12. - 15. März 2012, San Diego, USA.

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Abstract

Natural laminar flow is one of the challenging aims of the current aerospace research. Main reasons for the aerodynamic transition from laminar into turbulent flow focusing on the airfoil-structure is the aerodynamic shape and the surface roughness. The Institute of Composite Structures and Adaptive Systems at the German Aerospace Center in Braunschweig works on the optimization of the aerodynamic-loaded structure of future aircrafts in order to increase their efficiency. Providing wing structures suited for natural laminar flow is a step towards this goal. Regarding natural laminar flow, the structural design of the leading edge of a wing is of special interest. An approach for a gap-less leading edge was developed to provide a gap- and step-less high quality surface suited for natural laminar flow and to reduce slat noise. In a national project the first generation of the 3D full scale demonstrator was successfully tested in 2010. The prototype consists of several new technologies, opening up the issue of matching the long and challenging list of airworthiness requirements simultaneously. Therefore the developed composite structure was intensively tested for further modifications according to meet requirements for abrasion, impact and deicing basically. The former presented structure consists completely of glass-fiber-prepreg (GFRP-prepreg). New functions required the addition of a new material-mix, which has to fit into the manufacturing-chain of the composite structure. In addition the hybrid composites have to withstand high loadings, high bending-induced strains (1%) and environmentally influenced aging. Moreover hot-wet cycling tests are carried out for the basic GFRP-structure in order to simulate the long term behavior of the material under extrem conditions. The presented paper shows results of four-points-bending-tests of the most critical section of the morphing leading edge device. Different composite-hybrids are built up and processed. An experimental based trend towards an optimized material design will be shown.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Material characterization for morphing purposes in order to match flight requirements
Authors:
AuthorsInstitution or Email of Authors
Geier, SebastianUNSPECIFIED
Kintscher, MarkusUNSPECIFIED
Heintze, OlafUNSPECIFIED
Wierach, PeterUNSPECIFIED
Monner, Hans PeterUNSPECIFIED
Wiedemann, MartinUNSPECIFIED
Date:March 2012
Keywords:Smart droop nose, morphing structure, morphing wing leading edge, fully laminar natural flow, fully laminar wing concept
Event Title:SPIE Smart Structures/NDE
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:12. - 15. März 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Isolde Böhringer-Thelen
Deposited On:29 Mar 2012 15:04
Last Modified:14 Dec 2012 09:39

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