Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects on forming when using aligned multi wall carbon nanotubes in multi-stacked prepreg
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0001-8111-5202
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0002-6616-2964
2015 (English)In: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2015Conference paper, Published paper (Refereed)
Abstract [en]

Automated tape lay-up (ATL) combined with Hot Drape Forming (HDF) offer cost competitive manufacturing for large composite components. However, not carefully performed HDF of composite laminates could end up with out-of-plane fibre wrinkling. Previous studies with this technique has shown that the stacking sequence have a significant influence on wrinkle development during 3D-forming. One possible explanation to this might be the relatively high interply friction for the combination of [0] and [45] layers. Prepregs containing thermoplastic toughener particles show a higher level of interply friction compared to prepregs which do not contains such particles. It is therefore likely that interfacial particles in general will increase the interply friction. Such particles could be thermoplastic toughener or aligned multiwall carbon nanotubes (MWCNT). The aim of this study is to show how locally arranged MWCNTs in prepreg interlayers affect the global forming behaviour. An initial study of intraply shear and interply friction is performed with purpose to investigate how pregpreg with MWCNT interlayers on general influence the forming. Further an experimental forming study is performed with aligned MWCNT in the [-45] / [0] interlayers of a quasi-isotropic prepreg stacking sequence. A numerical study is also performed simulating the forming of the experimental spar geometry. The results show that the intraply shear resistance of the MWCNT containing material is 100% higher than for the reference. Further the interply friction is 3 to 4 times higher for the MWCNT containing material compared to the reference. The experimental spar study shows increased out-of-plane wrinkling in the joggled spar flange when using MWCNT in the [-45]/[0] interlayers. The numerical study strengthen the experimental results by showing increased compression across the fibre direction in the [0] layer when adding contact surfaces in the [-45]/[0] interlayers. 

Place, publisher, year, edition, pages
International Committee on Composite Materials , 2015.
Keywords [en]
Aligned, Carbon nanotubes, Forming, Multi wall
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236902Scopus ID: 2-s2.0-85053143697OAI: oai:DiVA.org:kth-236902DiVA, id: diva2:1269911
Conference
20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015
Funder
VINNOVA
Note

Funding details: VINNOVA; Funding text: The work was funded by Saab AB and the Swedish Governmental Agency for Innovation Systems through the Swedish Green Flying Demonstrator Vinnova Program.

QC 20181211

Available from: 2018-12-11 Created: 2018-12-11 Last updated: 2018-12-11Bibliographically approved

Open Access in DiVA

No full text in DiVA

Scopus

Authority records BETA

Sjölander, JensÅkermo, Malin

Search in DiVA

By author/editor
Sjölander, JensÅkermo, Malin
By organisation
Lightweight Structures
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 12 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf