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TESTING AND ANALYSIS OF ANISOGRID PREPREG ELEMENT SPECIMENS UNDER UNIAXIAL TENSION AND COMPRESSION

Niemann, Steffen and Wagner, Ronald and Beerhorst, Matthias and Hühne, Christian (2017) TESTING AND ANALYSIS OF ANISOGRID PREPREG ELEMENT SPECIMENS UNDER UNIAXIAL TENSION AND COMPRESSION. Composite Structures. Elsevier. DOI: http://dx.doi.org/10.1016/j.compstruct.2016.10.100 ISSN 0263-8223

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Abstract

This paper reports on test results and analysis of element sized Anisogrid Prepreg knot and rib specimens under uniaxial tension and compression. Anisogrid or Lattice structures consist of intersecting, integral manufactured ribs with different directions (circumferential, axial, and/or helical) and optionally a load bearing skin. The classical manufacturing method for aerospace grid structures is wet-filament winding. For airframes, an Anisogrid Prepreg structure concept has been developed considering high quality assurance demands and the need of a qualified automated manufacturing process (Advanced Fibre Placement). The Prepreg layers feature 60% fibre volume ratio for high stiffness properties, but need to be cut in the point of intersecting rib directions. The pattern of cut and uncut layers in the rib knot alternates for all rib directions over the height. Due to the special stacking of the ribs with rectangular cross-section and very narrow ply widths, a wide reference testing program is performed additionally. As result, an answer is given which stiffness and strength properties in tension and compression can be expected for this Anisogrid Prepreg structure concept.

Item URL in elib:https://elib.dlr.de/118275/
Document Type:Article
Title:TESTING AND ANALYSIS OF ANISOGRID PREPREG ELEMENT SPECIMENS UNDER UNIAXIAL TENSION AND COMPRESSION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Niemann, SteffenSteffen.Niemann (at) dlr.dehttps://orcid.org/0000-0001-9272-0635
Wagner, RonaldRonald.Wagner (at) dlr.deUNSPECIFIED
Beerhorst, MatthiasMatthias.Beerhorst (at) dlr.deUNSPECIFIED
Hühne, ChristianChristian.Huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223
Date:15 January 2017
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.1016/j.compstruct.2016.10.100
Publisher:Elsevier
ISSN:0263-8223
Status:Published
Keywords:Anisogrid, Analysis, Test, Tension, Compression, Knot, Rib, Airframe
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Air Traffic Concepts and Operation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Niemann, Herr Steffen
Deposited On:16 Jan 2018 11:03
Last Modified:10 Jan 2019 15:47

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