Exploration of irreversible residual stresses in a carbon/epoxy composite

Johnny Jakobsen; Fahimeh Shakibapour

doi:10.1088/1757-899X/942/1/012018

Exploration of irreversible residual stresses in a carbon/epoxy composite

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Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

Abstract

Residual stresses in composite material may rise from several sources; difference in thermal straining between fibre and matrix, chemical shrinkage of the matrix material. The presented paper explores an irreversible Eigen-strain in the material which is shown to change and be removed by a thermal treatment above the Tg of the matrix material. This has been observed though TMA measurements of a carbon/epoxy unidirectional sample. The local Eigen-strain is translated into stresses using a visco-elastic constitutive relation. Further exploration indicates that cooling rate influence the generation of residual stresses in the material.

Originalsprog	Engelsk
Titel	41st Risoe Symposium : Materials and design for next generation wind turbine blades
Vol/bind	942
Forlag	IOP Publishing
Publikationsdato	2020
Udgave	1
DOI	https://doi.org/10.1088/1757-899X/942/1/012018
Status	Udgivet - 2020
Begivenhed	Risø International Symposium on Materials Science 2020: Materials and Design for Next Generation Wind Turbine Blades - Roskilde, Danmark Varighed: 7 sep. 2020 → 10 sep. 2020 Konferencens nummer: 41

Konference

Konference	Risø International Symposium on Materials Science 2020
Nummer	41
Land/Område	Danmark
By	Roskilde
Periode	07/09/2020 → 10/09/2020

Emneord

Residual Stresses
Viscoelastic Materials
Composite material

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10.1088/1757-899X/942/1/012018Licens: CC BY 3.0

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Exploration of irreversible residual stresses in a carbon/epoxy composite. / Jakobsen, Johnny ; Shakibapour, Fahimeh.
41st Risoe Symposium: Materials and design for next generation wind turbine blades. Bind 942 1. udg. IOP Publishing, 2020.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

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AU - Shakibapour, Fahimeh

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N2 - Residual stresses in composite material may rise from several sources; difference in thermal straining between fibre and matrix, chemical shrinkage of the matrix material. The presented paper explores an irreversible Eigen-strain in the material which is shown to change and be removed by a thermal treatment above the Tg of the matrix material. This has been observed though TMA measurements of a carbon/epoxy unidirectional sample. The local Eigen-strain is translated into stresses using a visco-elastic constitutive relation. Further exploration indicates that cooling rate influence the generation of residual stresses in the material.

AB - Residual stresses in composite material may rise from several sources; difference in thermal straining between fibre and matrix, chemical shrinkage of the matrix material. The presented paper explores an irreversible Eigen-strain in the material which is shown to change and be removed by a thermal treatment above the Tg of the matrix material. This has been observed though TMA measurements of a carbon/epoxy unidirectional sample. The local Eigen-strain is translated into stresses using a visco-elastic constitutive relation. Further exploration indicates that cooling rate influence the generation of residual stresses in the material.

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KW - Viscoelastic Materials

KW - Composite material

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DO - 10.1088/1757-899X/942/1/012018

M3 - Article in proceeding

VL - 942

BT - 41st Risoe Symposium

PB - IOP Publishing

T2 - Risø International Symposium on Materials Science 2020

Y2 - 7 September 2020 through 10 September 2020

ER -

Exploration of irreversible residual stresses in a carbon/epoxy composite

Abstract

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