Prediction of spring-forward in continuous-fibre/polymer L-shaped parts

H.W. Wiersma, L.J.B. Peeters, L.J.B. Peeters, Remko Akkerman

Research output: Contribution to journalArticleAcademicpeer-review

90 Citations (Scopus)

Abstract

Continuous-fibre-reinforced thermoset laminates that are cured hot, exhibit deformations due to cure and thermal shrinkage. When L-shaped composite components are released from the mould after cooling to ambient temperature, a decrease of the enclosed angle is observed. This is referred to as the springforward phenomenon. The main cause of springforward, the mismatch in thermal expansion along and across the fibres, cannot explain totally the springforward found in experiments. Three other possible influences on springforward were investigated: an inhomogeneous fibre/matrix distribution through the thickness, an inhomogeneous heat distribution during the cure cycle and the difference in thermal expansion between the mould and the composite component. Finite element results show that the springforward is affected significantly by the amount of cure shrinkage and by the difference in thermal expansion between the mould and the composite component.
Original languageUndefined
Pages (from-to)1333-1342
JournalPolymer composites
Volume29A
Issue number11
DOIs
Publication statusPublished - 1998

Keywords

  • cure-cycle simulation
  • spring-forward
  • METIS-144573
  • IR-73910
  • Continuous-fibre-reinforced polymers

Cite this

Wiersma, H.W. ; Peeters, L.J.B. ; Peeters, L.J.B. ; Akkerman, Remko. / Prediction of spring-forward in continuous-fibre/polymer L-shaped parts. In: Polymer composites. 1998 ; Vol. 29A, No. 11. pp. 1333-1342.
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Prediction of spring-forward in continuous-fibre/polymer L-shaped parts. / Wiersma, H.W.; Peeters, L.J.B.; Peeters, L.J.B.; Akkerman, Remko.

In: Polymer composites, Vol. 29A, No. 11, 1998, p. 1333-1342.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Prediction of spring-forward in continuous-fibre/polymer L-shaped parts

AU - Wiersma, H.W.

AU - Peeters, L.J.B.

AU - Peeters, L.J.B.

AU - Akkerman, Remko

PY - 1998

Y1 - 1998

N2 - Continuous-fibre-reinforced thermoset laminates that are cured hot, exhibit deformations due to cure and thermal shrinkage. When L-shaped composite components are released from the mould after cooling to ambient temperature, a decrease of the enclosed angle is observed. This is referred to as the springforward phenomenon. The main cause of springforward, the mismatch in thermal expansion along and across the fibres, cannot explain totally the springforward found in experiments. Three other possible influences on springforward were investigated: an inhomogeneous fibre/matrix distribution through the thickness, an inhomogeneous heat distribution during the cure cycle and the difference in thermal expansion between the mould and the composite component. Finite element results show that the springforward is affected significantly by the amount of cure shrinkage and by the difference in thermal expansion between the mould and the composite component.

AB - Continuous-fibre-reinforced thermoset laminates that are cured hot, exhibit deformations due to cure and thermal shrinkage. When L-shaped composite components are released from the mould after cooling to ambient temperature, a decrease of the enclosed angle is observed. This is referred to as the springforward phenomenon. The main cause of springforward, the mismatch in thermal expansion along and across the fibres, cannot explain totally the springforward found in experiments. Three other possible influences on springforward were investigated: an inhomogeneous fibre/matrix distribution through the thickness, an inhomogeneous heat distribution during the cure cycle and the difference in thermal expansion between the mould and the composite component. Finite element results show that the springforward is affected significantly by the amount of cure shrinkage and by the difference in thermal expansion between the mould and the composite component.

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KW - spring-forward

KW - METIS-144573

KW - IR-73910

KW - Continuous-fibre-reinforced polymers

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DO - 10.1016/S1359-835X(98)00062-1

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