Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades

Giacomo Struzziero; Julie J.E. Teuwen

doi:10.1016/j.procir.2019.09.002

Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades

Aerospace Manufacturing Technologies

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

1 Citation (Scopus)

18 Downloads (Pure)

Abstract

The present paper investigates the generation of cure induced residual stresses during the cure stage of the Vacuum Assisted Resin Transfer Moulding (VARTM) process for the fabrication of ultra-thick components (i.e. 105 mm) for wind turbine blades manufacturing (i.e. root insert). The viscous-elastic material characterisation of the Airstone 780E epoxy resin mixed with the 785H Hardener has been undertaken and the corresponding coupled thermo-mechanical simulation has been implemented using a commercial FE solver. The finding points out that the level of residual stresses generated during the cure stage leads to a spring-in of about 1.3 cm when Manufacturer Recommended Cure Cycle is applied and that improvements in both spring-in and cure time can be obtained by applying different cure cycles.

Original language	English
Title of host publication	Proceedings of 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield (UK), 2019
Editors	Kevin Kerrigan, Paul Mativenga, Hassan El-Dessouky
Publisher	Elsevier
Pages	7-11
Number of pages	5
Volume	85
DOIs	https://doi.org/10.1016/j.procir.2019.09.002
Publication status	Published - 2019
Event	2nd CIRP Conference on Composite Material Parts Manufacturing - Sheffield, United Kingdom Duration: 10 Oct 2019 → … Conference number: 2

Publication series

Name	Procedia CIRP
Publisher	Elsevier
ISSN (Print)	2212-8271

Conference

Conference	2nd CIRP Conference on Composite Material Parts Manufacturing
Abbreviated title	2nd CIRP CCMPM
Country/Territory	United Kingdom
City	Sheffield
Period	10/10/19 → …

Keywords

Composite
VARTM
Thermo-mechanical properties
Springback

Access to Document

10.1016/j.procir.2019.09.002

1-s2.0-S2212827119312624-main (1)Final published version, 759 KBLicence: CC BY-NC-ND

Cite this

Struzziero, G., & Teuwen, J. J. E. (2019). Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades. In K. Kerrigan, P. Mativenga, & H. El-Dessouky (Eds.), Proceedings of 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield (UK), 2019 (Vol. 85, pp. 7-11). (Procedia CIRP). Elsevier. https://doi.org/10.1016/j.procir.2019.09.002

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title = "Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades",

abstract = "The present paper investigates the generation of cure induced residual stresses during the cure stage of the Vacuum Assisted Resin Transfer Moulding (VARTM) process for the fabrication of ultra-thick components (i.e. 105 mm) for wind turbine blades manufacturing (i.e. root insert). The viscous-elastic material characterisation of the Airstone 780E epoxy resin mixed with the 785H Hardener has been undertaken and the corresponding coupled thermo-mechanical simulation has been implemented using a commercial FE solver. The finding points out that the level of residual stresses generated during the cure stage leads to a spring-in of about 1.3 cm when Manufacturer Recommended Cure Cycle is applied and that improvements in both spring-in and cure time can be obtained by applying different cure cycles.",

keywords = "Composite, VARTM, Thermo-mechanical properties, Springback",

author = "Giacomo Struzziero and Teuwen, {Julie J.E.}",

year = "2019",

doi = "10.1016/j.procir.2019.09.002",

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editor = "Kevin Kerrigan and Paul Mativenga and Hassan El-Dessouky",

booktitle = "Proceedings of 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield (UK), 2019",

note = "2nd CIRP Conference on Composite Material Parts Manufacturing, 2nd CIRP CCMPM ; Conference date: 10-10-2019",

}

Struzziero, G & Teuwen, JJE 2019, Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades. in K Kerrigan, P Mativenga & H El-Dessouky (eds), Proceedings of 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield (UK), 2019 . vol. 85, Procedia CIRP, Elsevier, pp. 7-11, 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield, United Kingdom, 10/10/19. https://doi.org/10.1016/j.procir.2019.09.002

Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades. / Struzziero, Giacomo; Teuwen, Julie J.E.

Proceedings of 2nd CIRP Conference on Composite Material Parts Manufacturing, Sheffield (UK), 2019 . ed. / Kevin Kerrigan; Paul Mativenga; Hassan El-Dessouky. Vol. 85 Elsevier, 2019. p. 7-11 (Procedia CIRP).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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T1 - Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades

AU - Struzziero, Giacomo

AU - Teuwen, Julie J.E.

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N2 - The present paper investigates the generation of cure induced residual stresses during the cure stage of the Vacuum Assisted Resin Transfer Moulding (VARTM) process for the fabrication of ultra-thick components (i.e. 105 mm) for wind turbine blades manufacturing (i.e. root insert). The viscous-elastic material characterisation of the Airstone 780E epoxy resin mixed with the 785H Hardener has been undertaken and the corresponding coupled thermo-mechanical simulation has been implemented using a commercial FE solver. The finding points out that the level of residual stresses generated during the cure stage leads to a spring-in of about 1.3 cm when Manufacturer Recommended Cure Cycle is applied and that improvements in both spring-in and cure time can be obtained by applying different cure cycles.

AB - The present paper investigates the generation of cure induced residual stresses during the cure stage of the Vacuum Assisted Resin Transfer Moulding (VARTM) process for the fabrication of ultra-thick components (i.e. 105 mm) for wind turbine blades manufacturing (i.e. root insert). The viscous-elastic material characterisation of the Airstone 780E epoxy resin mixed with the 785H Hardener has been undertaken and the corresponding coupled thermo-mechanical simulation has been implemented using a commercial FE solver. The finding points out that the level of residual stresses generated during the cure stage leads to a spring-in of about 1.3 cm when Manufacturer Recommended Cure Cycle is applied and that improvements in both spring-in and cure time can be obtained by applying different cure cycles.

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KW - Thermo-mechanical properties

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Residual Stresses Generation in Ultra-Thick Components for Wind Turbine Blades

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