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Static Aeroelastic Stiffness Optimization and Investigation of Forward Swept Composite Wings

Dillinger, Johannes and Abdalla, M.M. and Klimmek, Thomas and Gürdal, Z. (2013) Static Aeroelastic Stiffness Optimization and Investigation of Forward Swept Composite Wings. 10th World Congress on Structural and Multidisciplinary Optimization, 19-24 May 2013, Orlando, Florida, USA.

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Abstract

In this paper we present a detailed investigation of the aeroelastic optimization of swept forward composite wings. The wing is allowed to have variable stiffness, i.e., a varying thickness and stiffness matrices in the wing skins, and the use of balanced and unbalanced laminates is considered. Aside from common mass and stress responses, aeroelastic responses like aileron effectiveness, divergence and wing twist are also considered. Taking mass as an objective function, different sets of constraints on the structural and aeroelastic responses are investigated. The influence of minimum aileron effectiveness, divergence pressure and twist on the wing skin mass is analyzed. Load alleviation is a direct consequence of the mass objective and inherent to optimization with aeroelastic loads. Therefore is not necessary to consider it explicitly as a response. The essential difference of balanced and unbalanced laminates with their effects on mass and stiffness distribution is presented, and the influence of leading edge sweep angle on the optimized skin masses is investigated, subject again to variable sets of constraints.

Item URL in elib:https://elib.dlr.de/84218/
Document Type:Conference or Workshop Item (Speech)
Additional Information:http://www2.mae.ufl.edu/mdo/Papers/5414.pdf http://www2.mae.ufl.edu/mdo/WCSMO10-Sessions.htm
Title:Static Aeroelastic Stiffness Optimization and Investigation of Forward Swept Composite Wings
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dillinger, Johannesjohannes.dillinger (at) dlr.deUNSPECIFIED
Abdalla, M.M.Aerospace Structures, Delft University of TechnologyUNSPECIFIED
Klimmek, Thomasthomas.klimmek (at) dlr.deUNSPECIFIED
Gürdal, Z.University of South Carolina, Columbia, South Carolina, USAUNSPECIFIED
Date:May 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:stiffness optimization; forward swept wing; aeroelastic tailoring; composite
Event Title:10th World Congress on Structural and Multidisciplinary Optimization
Event Location:Orlando, Florida, USA
Event Type:international Conference
Event Dates:19-24 May 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Dillinger, Johannes
Deposited On:25 Sep 2013 11:16
Last Modified:08 May 2014 23:24

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