Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites

Research output: Contribution to conferencePaperAcademicpeer-review

Abstract

Waviness defects can occur during consolidation of a thermoplastic composite laminate. The formation of this waviness is investigated with an experimental setup, designed for consolidating a laminate using a glass plate. This enables direct observation of waviness formation during processing. It is found that waviness is formed in two stages: in the first place during melting of the laminate and secondly during the cooling phase between melt and crystallization. This research indicates that matrix shrinkage does not play a role in the formation of fiber waviness in AS4/PEEK during cooling. Together with the relevant factors affecting waviness formation from literature, this leaves residual stresses and tool shrinkage as the driving forces for waviness formation during press consolidation of AS4/PEEK laminates.
Original languageEnglish
Publication statusPublished - 2018
EventSAMPE Europe 2018 - Southampton, United Kingdom
Duration: 11 Sep 201813 Sep 2018

Conference

ConferenceSAMPE Europe 2018
CountryUnited Kingdom
CitySouthampton
Period11/09/1813/09/18

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consolidation
cooling
residual stress
defect
crystallization
melting
glass
melt
matrix
press
fibre

Cite this

Krämer, E. (2018). Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites. Paper presented at SAMPE Europe 2018, Southampton, United Kingdom.
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title = "Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites",
abstract = "Waviness defects can occur during consolidation of a thermoplastic composite laminate. The formation of this waviness is investigated with an experimental setup, designed for consolidating a laminate using a glass plate. This enables direct observation of waviness formation during processing. It is found that waviness is formed in two stages: in the first place during melting of the laminate and secondly during the cooling phase between melt and crystallization. This research indicates that matrix shrinkage does not play a role in the formation of fiber waviness in AS4/PEEK during cooling. Together with the relevant factors affecting waviness formation from literature, this leaves residual stresses and tool shrinkage as the driving forces for waviness formation during press consolidation of AS4/PEEK laminates.",
author = "Erik Kr{\"a}mer",
year = "2018",
language = "English",
note = "SAMPE Europe 2018 ; Conference date: 11-09-2018 Through 13-09-2018",

}

Krämer, E 2018, 'Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites' Paper presented at SAMPE Europe 2018, Southampton, United Kingdom, 11/09/18 - 13/09/18, .

Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites. / Krämer, Erik.

2018. Paper presented at SAMPE Europe 2018, Southampton, United Kingdom.

Research output: Contribution to conferencePaperAcademicpeer-review

TY - CONF

T1 - Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites

AU - Krämer, Erik

PY - 2018

Y1 - 2018

N2 - Waviness defects can occur during consolidation of a thermoplastic composite laminate. The formation of this waviness is investigated with an experimental setup, designed for consolidating a laminate using a glass plate. This enables direct observation of waviness formation during processing. It is found that waviness is formed in two stages: in the first place during melting of the laminate and secondly during the cooling phase between melt and crystallization. This research indicates that matrix shrinkage does not play a role in the formation of fiber waviness in AS4/PEEK during cooling. Together with the relevant factors affecting waviness formation from literature, this leaves residual stresses and tool shrinkage as the driving forces for waviness formation during press consolidation of AS4/PEEK laminates.

AB - Waviness defects can occur during consolidation of a thermoplastic composite laminate. The formation of this waviness is investigated with an experimental setup, designed for consolidating a laminate using a glass plate. This enables direct observation of waviness formation during processing. It is found that waviness is formed in two stages: in the first place during melting of the laminate and secondly during the cooling phase between melt and crystallization. This research indicates that matrix shrinkage does not play a role in the formation of fiber waviness in AS4/PEEK during cooling. Together with the relevant factors affecting waviness formation from literature, this leaves residual stresses and tool shrinkage as the driving forces for waviness formation during press consolidation of AS4/PEEK laminates.

M3 - Paper

ER -

Krämer E. Direct observation of waviness formation in the consolidation of AS4-PEEK thermoplastic composites. 2018. Paper presented at SAMPE Europe 2018, Southampton, United Kingdom.