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dc.contributor.author
Woigk, Wilhelm
dc.contributor.author
Zhang, Bing
dc.contributor.author
Jones, Mike I.
dc.contributor.author
Kuhtz, Moritz
dc.contributor.author
Hornig, Andreas
dc.contributor.author
Gude, Maik
dc.contributor.author
Hallett, Stephen R.
dc.date.accessioned
2021-08-12T05:10:49Z
dc.date.available
2021-08-11T04:39:09Z
dc.date.available
2021-08-11T05:23:14Z
dc.date.available
2021-08-12T05:10:49Z
dc.date.issued
2021-09-15
dc.identifier.issn
0263-8223
dc.identifier.issn
1879-1085
dc.identifier.other
10.1016/j.compstruct.2021.114197
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/500378
dc.identifier.doi
10.3929/ethz-b-000500378
dc.description.abstract
Automated Fibre Placement (AFP) is a manufacturing technique to produce large, high quality composite parts, where preimpregnated carbon fibre tapes are laid side-by-side to generate the composite preform. Thickness changes within a component are realised through internal ply terminations, with the tapes being cut perpendicular to the fibre direction. In plies laid up at an angle to the taper direction, the AFP tape cuts create saw-tooth shaped ply drop tips. This increases the size of resin rich zones and enlarges the region where stress concentrations and cracks can develop, which amplifies the risk of failure. This study investigates the effect of simulated AFP saw-tooth ply drop tips, created by hand layup, on the mechanical properties and failure behaviour of carbon fibre/epoxy composites and compares its results to reference broad goods layups. The stiffness was found to be unaffected and the strength was reduced by similar to 10%. The failure mode was governed by delamination for the saw-tooth ply drop tips, whereas the reference specimens failed by rupture of the unidirectional fibres. A finite element modelling technique was used to select the layup to be tested. The models were then refined in the light of experimental results, to accurately predict the failure and explain the failure mode transition.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Automated fibre placement
en_US
dc.subject
Ply drops
en_US
dc.subject
Stress concentrations
en_US
dc.subject
Delamination
en_US
dc.title
Effect of saw-tooth ply drops on the mechanical performance of tapered composite laminates
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2021-05-29
ethz.journal.title
Composite Structures
ethz.journal.volume
272
en_US
ethz.journal.abbreviated
Compos. struct.
ethz.pages.start
114197
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::03831 - Studart, André R. / Studart, André R.
en_US
ethz.date.deposited
2021-08-11T04:39:16Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-11T05:23:22Z
ethz.rosetta.lastUpdated
2022-03-29T11:01:23Z
ethz.rosetta.versionExported
true
ethz.COinS
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