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Design and Testing of a Compliant Mechanism-Based Demonstrator for a Droop-Nose Morphing Device

Vasista, Srinivas and Riemenschneider, Johannes and Monner, Hans Peter (2015) Design and Testing of a Compliant Mechanism-Based Demonstrator for a Droop-Nose Morphing Device. 23rd AIAA/AHS Adaptive Structures Conference, 05.-09. Jan. 2015, Kissimmee, Florida, USA.

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Abstract

A demonstrator morphing leading edge was designed and manufactured as an intermediary step in preparation for wind tunnel testing of a droop-nose adaptive morphing wingtip (AMWT) as part of the European FP7 project NOVEMOR. This demonstrator features a flexible fiberglass skin and a monolithic aluminum internal compliant mechanism and support structure for lightweight design. The design process involves the design of the skin via a structural optimization tool, followed by continuum gradient-based topology optimization of first the compliant mechanism and then the support structure. The skin was manufactured using prepreg Hexcel HexPly® 913 plies, the aluminum internal structure was laser cut from stock plate material and the compliant region was driven by a linear stepper motor actuator. Displacements and strains were measured and compared with target values and that of finite element computations and overall show good agreement; however issues such as grey-areas and hinge-regions in the topology optimization need to be addressed for the final wind tunnel design for better post-processing and reduced stress concentrations.

Item URL in elib:https://elib.dlr.de/97105/
Document Type:Conference or Workshop Item (Speech)
Title:Design and Testing of a Compliant Mechanism-Based Demonstrator for a Droop-Nose Morphing Device
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vasista, SrinivasInstitut für Faserverbundleichtbau und AdaptronikUNSPECIFIED
Riemenschneider, JohannesInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Monner, Hans PeterInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Date:January 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Morphing, Droop Nose
Event Title:23rd AIAA/AHS Adaptive Structures Conference
Event Location:Kissimmee, Florida, USA
Event Type:international Conference
Event Dates:05.-09. Jan. 2015
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 - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Stanitzek, Silke
Deposited On:20 Jul 2015 15:25
Last Modified:31 Jul 2019 19:53

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