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Anisogrid stiffened panel under axial compression: Manufacturing, numerical analysis and experimental testing

Niemann, Steffen und Wagner, Ronald und Hühne, Christian (2021) Anisogrid stiffened panel under axial compression: Manufacturing, numerical analysis and experimental testing. Thin-Walled Structures. Elsevier. doi: 10.1016/j.tws.2021.107483. ISSN 0263-8231.

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Kurzfassung

Within the collaborative FP7 project PoLaRBEAR a high-performance anisogrid prepreg structure concept has been developed considering high quality assurance demands and the need of a state of art manufacturing process (advanced fiber placement). This paper reports on the design, analysis, manufacturing and test of an anisogrid prepreg panel under uniaxial compression. The anisogrid structures consist of intersecting, integral manufactured stiffeners with different directions (helical, circumferential and/or axial) and a load bearing skin. The stiffeners are manufactured from prepreg layers with 60% fiber volume ratio. An alternating pattern of cut and uncut layers is used within the intersection knots to avoid thickening. In addition, there are special interface layers in the stiffener laminate in order to ensure a proper connection between the grid and the load bearing skin even within the postbuckling range. Optical measurements showed that the panel was burdened by manufacturing induced geometric imperfections (process inducted deformations or spring-in) which caused a slight curvature of the anisogrid panel. Geometrically non-linear analyzes were performed using ABAQUS and B2000þþ in order to analyze the pre- and postbuckling response of the panel under axial compression with and without imperfections. Numerical and experimental results are in good agreement if the process induced deformations are considered.

elib-URL des Eintrags:https://elib.dlr.de/141062/
Dokumentart:Zeitschriftenbeitrag
Titel:Anisogrid stiffened panel under axial compression: Manufacturing, numerical analysis and experimental testing
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Niemann, SteffenSteffen.Niemann (at) dlr.dehttps://orcid.org/0000-0001-9272-0635NICHT SPEZIFIZIERT
Wagner, Ronaldro.wagner (at) tu-braunschweig.dehttps://orcid.org/0000-0003-2749-1455NICHT SPEZIFIZIERT
Hühne, ChristianChristian.Huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223NICHT SPEZIFIZIERT
Datum:Januar 2021
Erschienen in:Thin-Walled Structures
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1016/j.tws.2021.107483
Verlag:Elsevier
ISSN:0263-8231
Status:veröffentlicht
Stichwörter:Anisogrid Panel Analysis Test Compression Post-buckling Airframe Process-induced distortions Geometric imperfections
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Komponenten und Systeme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CS - Komponenten und Systeme
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturwerkstoffe und Bauweisen
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Funktionsleichtbau
Hinterlegt von: Niemann, Herr Steffen
Hinterlegt am:22 Feb 2021 06:52
Letzte Änderung:20 Jun 2021 15:54

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