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Design of a morphing winglet trailing edge based on Fluid Actuated Morphing Unit Structures

Contaldi, Carmine and Vasista, Srinivas (2020) Design of a morphing winglet trailing edge based on Fluid Actuated Morphing Unit Structures. DLR-Interner Bericht. DLR-IB-FA-BS-2021-232. Master's. Politecnico di Milano. 177 S.

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Abstract

In aeronautical industry the reduction of the fuel consumption is always researched to pollute less as well as to decrease the flight mission costs. Many solutions can be adopted, spacing from more efficient engines, less heavy structures to better aerodynamic performances. The purpose of the thesis is to focus on the use of a winglet morphing trailing edge based on fluid actuated unit structures (FAMoUS) made of elastomeric cells reinforced with constraining rings. The cells can elongate when pressurised, in order to improve aerodynamics in off design conditions and to reduce the structural mass thanks to the load alleviation capability. The conducted research regards investigations on the many geometry variables, such as the thicknesses of all the parts and constraining rings number, to find the most performing design mostly in terms of trailing edge deflection angle, but at the same time without neglecting maximum allowable stress values, free-stream exposed surfaces shape changes and easiness of manufacturing. Finite element analyses with three-dimensional structural and hydrostatic fluid elements are used to model the structural behaviour. The work firstly regards analyses on a single unit structure with all the variables parametrised, and then the design found to be the best has been included in more advanced and complete models with more cells. Throughout the thesis different methodologies have been used to face many problems related to the convergence of the results and to simplify high time consuming models, and, at the end, the design parameters, for the final model worthy to be manufactured, have been provided.

Item URL in elib:https://elib.dlr.de/146882/
Document Type:Monograph (DLR-Interner Bericht, Master's)
Title:Design of a morphing winglet trailing edge based on Fluid Actuated Morphing Unit Structures
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Contaldi, CarminePolitecnico di MilanoUNSPECIFIED
Vasista, SrinivasUNSPECIFIEDhttps://orcid.org/0000-0002-7917-6740
Date:15 December 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:177
Status:Published
Keywords:Morphing wing, integrated actuation
Institution:Politecnico di Milano
Department:School of Industrial and Information Engineering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Schlegel, Linda
Deposited On:13 Dec 2021 07:42
Last Modified:13 Dec 2021 07:42

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