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Structural Concepts for Passive Load Alleviation

Bramsiepe, Kjell and Gröhlich, Martin and Dähne, Sascha and Hahn, Daniel (2022) Structural Concepts for Passive Load Alleviation. In: AIAA SciTech 2022 Forum. AIAA SCITECH 2022 Forum, 3.-7. Jan. 2022, San Diego, CA & Virtual. doi: 10.2514/6.2022-0687. ISBN 978-162410631-6.

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Background: Nonlinear elastic concepts like degressive springs or shape memory alloys show up a wide range usage. Linear relations are then customizable for such stiffness technologies. Objective: The aim of the structural research units is to transfer this effect of stiffnesses nonlinearities into the field of aeronautical engineering. Method: For that purpose, a structural full finite element model is set up as a reference model for all concepts. To investigate several stiffness technologies, a nonlinear elastic beam method is developed. A technology for nonlinear elastic wing structures with buckling skin panels is presented. In addition, a nonlinear bending-torsion coupling is introduced by a buckling wing segment. Viscoelastic materials are applied to the structure by a constraint layer damping attachment. Results: The presented structural concepts have a potential to alleviate the loads of maneuver and gust encounters. Constraint layer damping can be used to limit the amplitude of a chosen eigenmode.

Item URL in elib:https://elib.dlr.de/148310/
Document Type:Conference or Workshop Item (Speech)
Title:Structural Concepts for Passive Load Alleviation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bramsiepe, KjellUNSPECIFIEDhttps://orcid.org/0000-0003-3351-8036UNSPECIFIED
Gröhlich, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-4552-4006UNSPECIFIED
Dähne, SaschaUNSPECIFIEDhttps://orcid.org/0000-0003-3497-3225140199822
Date:January 2022
Journal or Publication Title:AIAA SciTech 2022 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:passive load alleviation, structural concepts, nonlinear elastic, viscoelastic design
Event Title:AIAA SCITECH 2022 Forum
Event Location:San Diego, CA & Virtual
Event Type:international Conference
Event Dates:3.-7. Jan. 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Institute of Aeroelasticity > Structural Dynamics and System Identification
Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Bramsiepe, Kjell
Deposited On:14 Jan 2022 12:17
Last Modified:10 Aug 2023 07:36

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