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Interleaving light veils to minimise the trade-off between mode-I interlaminar fracture toughness and in-plane properties

Interleaving light veils to minimise the trade-off between mode-I interlaminar fracture toughness and in-plane properties
Interleaving light veils to minimise the trade-off between mode-I interlaminar fracture toughness and in-plane properties
Interleaving heavy micro-fibre veils, commonly used to improve interlaminar fracture toughness, severely compromises tensile and compressive properties. To reduce the trade-off, this study interleaved two different types of light (4 g/m2) co-polyamide veils into a thin-ply quasi-isotropic baseline laminate. Sub-micron resolution X-ray micro-computed tomography provided insight into the after-manufacturing state of the veil fibres as well as into the fracture process zone of mode-I interlaminar fracture toughness specimens. The veil fibre diameter was the key parameter in determining the tensile properties (the veil with thinner fibres avoided resin accumulation at the interfaces and left the baseline properties unaffected). Both veils decreased the compressive strength by up to 9%. Mode-I crack propagation was controlled by the adhesion between the veil fibres and resin. Veils fibres with the higher adhesion deflected crack propagation to the surrounding 0° plies, which improved mode-I initiation and propagation interlaminar fracture toughness (by 101% and 43%).
Thin-plies, Non-woven veils, B. Mechanical properties, D. CT analysis
1359-835X
García-Rodríguez, Santiago
df0ad396-b0cd-4d60-af55-2b9e6d4051c1
Costa Balanzat, Josep
5f6c032f-f276-4436-8a4a-b8230146929c
Rankin, Kathryn
d9516566-0ad8-473d-b99b-4683c663a2b7
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Singery, Vicky
92cebe1b-e674-4ddf-b5c1-8aa1265ec143
Mayugo Majo, Joan
66b5726f-5d72-45de-8004-b045cae81717
García-Rodríguez, Santiago
df0ad396-b0cd-4d60-af55-2b9e6d4051c1
Costa Balanzat, Josep
5f6c032f-f276-4436-8a4a-b8230146929c
Rankin, Kathryn
d9516566-0ad8-473d-b99b-4683c663a2b7
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Singery, Vicky
92cebe1b-e674-4ddf-b5c1-8aa1265ec143
Mayugo Majo, Joan
66b5726f-5d72-45de-8004-b045cae81717

García-Rodríguez, Santiago, Costa Balanzat, Josep, Rankin, Kathryn, Boardman, Richard, Singery, Vicky and Mayugo Majo, Joan (2020) Interleaving light veils to minimise the trade-off between mode-I interlaminar fracture toughness and in-plane properties. Composites Part A: Applied Science and Manufacturing, 128, [105659]. (doi:10.1016/j.compositesa.2019.105659).

Record type: Article

Abstract

Interleaving heavy micro-fibre veils, commonly used to improve interlaminar fracture toughness, severely compromises tensile and compressive properties. To reduce the trade-off, this study interleaved two different types of light (4 g/m2) co-polyamide veils into a thin-ply quasi-isotropic baseline laminate. Sub-micron resolution X-ray micro-computed tomography provided insight into the after-manufacturing state of the veil fibres as well as into the fracture process zone of mode-I interlaminar fracture toughness specimens. The veil fibre diameter was the key parameter in determining the tensile properties (the veil with thinner fibres avoided resin accumulation at the interfaces and left the baseline properties unaffected). Both veils decreased the compressive strength by up to 9%. Mode-I crack propagation was controlled by the adhesion between the veil fibres and resin. Veils fibres with the higher adhesion deflected crack propagation to the surrounding 0° plies, which improved mode-I initiation and propagation interlaminar fracture toughness (by 101% and 43%).

Text
Accepted author's manuscript: Interleaving light veils to minimise the trade-off between mode-I interlaminar fracture toughness and in-plane properties - Accepted Manuscript
Restricted to Repository staff only until 15 October 2020.
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More information

Accepted/In Press date: 11 October 2019
e-pub ahead of print date: 15 October 2019
Published date: January 2020
Keywords: Thin-plies, Non-woven veils, B. Mechanical properties, D. CT analysis

Identifiers

Local EPrints ID: 435697
URI: http://eprints.soton.ac.uk/id/eprint/435697
ISSN: 1359-835X
PURE UUID: 5e6fcb86-58eb-44e1-b1f3-83e0ac9cd9ac

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Date deposited: 18 Nov 2019 17:30
Last modified: 16 Dec 2019 17:31

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