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  4. Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms
 
research article

Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms

Jespersen, S. T.  
•
Baudry, F.
•
Wakeman, M. D.
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2009
Applied Composite Materials

A novel thermoplastic programmable preforming process, TP-P4, has been used to manufacture preforms for non-isothermal compression molding. Commingled glass and polypropylene yarns are deposited by robot onto a vacuum screen, followed by a heat-setting operation to stabilize the as-placed yarns for subsequent handling. After an optional additional preconsolidation stage, the preforms are molded by preheating and subsequent press forming in a shear edge tool. The in- and out-of-plane flow capabilities of the material were investigated, and compared to those of 40 wt% Glass Mat Thermoplastics (GMTs). Although the TP-P4 material has a fiber fraction of 60 wt%, the material could be processed to fill 77 mm deep ribs with a thickness of 3 mm, indicative of complex part production. The pressure requirements for out-of-plane flow were shown to depend on the fiber length and fiber alignment. Segregation phenomena were found to be less severe with TP-P4 than with GMT material.

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Type
research article
DOI
10.1007/s10443-009-9103-9
Web of Science ID

WOS:000271978100001

Author(s)
Jespersen, S. T.  
Baudry, F.
Wakeman, M. D.
Michaud, V.  
Blanchard, P.
Norris, R.
Månson, J-A. E.  
Date Issued

2009

Publisher

Springer Netherlands

Published in
Applied Composite Materials
Volume

16

Issue

6

Start page

331

End page

344

Subjects

Preforming

•

Consolidation

•

Thermoplastic

•

Composites

•

Commingled yarns

Note

National Licences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTC  
Available on Infoscience
October 7, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/43265
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