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Shape and Layer Optimization for the Dynamic Characterization of Carbon Fiber Plastics

Forsthofer, Nicolai (2021) Shape and Layer Optimization for the Dynamic Characterization of Carbon Fiber Plastics. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2021. DLRK 2021, 31.08. - 02.09.2021, Bremen, Detuschland. doi: 10.25967/550206.

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Official URL: https://publikationen.dglr.de/?tx_dglrpublications_pi1%5bdocument_id%5d=550206


A method is proposed for determining the optimum size and layer structure of dynamic test specimens made of carbon fiber reinforced plastics for shaker testing. In order to simulate the fatigue strength of high performance structures, detailed knowledge of their dynamic material properties is required. The quality of the test specimens is mainly influenced by their shape and, in case of carbon fiber materials, by their layer structure and fiber orientation. The design goals of the optimization are to increase test accuracy and to reduce testing time. While the accuracy increases with higher amplitudes and equal stress distribution in the specimen, the time efficiency decreases with higher amplitudes. Especially with the introduced method, dynamic testing provides highly accurate results and can be used to validate the stiffness parameters which are mostly derived from static testing. The natural frequencies for a given shape depend only on the material stiffness parameters and the material density. Using classical laminate theory, the stiffness parameters are optimized in a best-fit approach and can thus be used to minimize the error of measurement of the static material characterization.

Item URL in elib:https://elib.dlr.de/145685/
Document Type:Conference or Workshop Item (Poster)
Title:Shape and Layer Optimization for the Dynamic Characterization of Carbon Fiber Plastics
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Forsthofer, NicolaiNicolai.Forsthofer (at) dlr.deUNSPECIFIED
Date:2 September 2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.25967/550206
EditorsEmailEditor's ORCID iD
Forsthofer, NicolaiNicolai.Forsthofer@dlr.deUNSPECIFIED
Publisher:Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2021
Series Name:DGLR Netzpublikation
Keywords:Dynamic Characterization, Carbon Fiber Reinforced Plastics, Parameter Optimization
Event Title:DLRK 2021
Event Location:Bremen, Detuschland
Event Type:national Conference
Event Dates:31.08. - 02.09.2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Future Engines and Engine Integration, L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Design and Manufacture Technologies
Deposited By: Forsthofer, Nicolai
Deposited On:17 Nov 2021 09:09
Last Modified:17 Nov 2021 09:09

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