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An experimental study of mechanisms behind wrinkle development during forming of composite laminates
SAAB AB, Linköping.
Aeuronautical and Vehicle Eng/Lightweigh Structures, KTH, Stockholm.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, The Institute of Technology.
SAAB AB, Linköping.
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2013 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 50, 54-64 p.Article in journal (Refereed) Published
Abstract [en]

A general problem when forming quasi-isotropic, multilayer unidirectional (UD) prepreg over a double curved geometry is out-of-plane wrinkling. The presented study aims to show the existence of compression in the laminate in a recess area that is globally under tension during forming. Further it aims to investigate the influence of compression on the out-of-plane wrinkle development.

An experimental study is performed with pre-stacked UD prepreg on a forming tool with varying cross section. Investigated parameters include lay-up sequence, prepreg ply thickness, inter-ply friction and prepreg ply impregnation. Experimental evaluation is performed on the out-of-plane defect height, type, location and number. Further, measurements are performed on the outer-ply deformation in the z-direction and inside the formed component using Micro CT. The study show that compression is to some degree always developed during forming of a recess area but that the lay-up sequence has a dominant effect on the wrinkling development.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 50, 54-64 p.
Keyword [en]
carbon fiber, laminates, forming, prepreg
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-91325DOI: 10.1016/j.compositesa.2013.03.013OAI: oai:DiVA.org:liu-91325DiVA: diva2:617202
Available from: 2013-04-22 Created: 2013-04-22 Last updated: 2017-12-06

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Mattei, Christophe

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  • apa
  • harvard1
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  • modern-language-association-8th-edition
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  • Other style
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  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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  • asciidoc
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