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Aligned discontinuous carbon fibre tows in hybrid composites and their tensile behaviour: an experimental study

Aligned discontinuous carbon fibre tows in hybrid composites and their tensile behaviour: an experimental study
Aligned discontinuous carbon fibre tows in hybrid composites and their tensile behaviour: an experimental study

The paper aims to explore potential higher value applications of discontinuous carbon fibre tows. A vibration-assisted dry alignment method is presented to align the discontinuous fibre tows between conventional dry reinforcement mats/fabrics to fabricate cost-effective hybrid composites. Its viability is demonstrated by successful fabrication of two hybrid composite panels, where thin layers of aligned 12 mm discontinuous carbon fibre tows were deposited between E-glass chopped strand mats or woven fabrics respectively, via an out-of-autoclave resin infusion process; 54% and 81% of the fibre tows were aligned in the range of ±5° and ±10°, respectively. The tensile test results clearly demonstrate the importance of having the discontinuous fibre tows highly aligned in the hybrid composites, which shows increased stiffness (up to 24.4%) and strength (up to 59.9%) over the non-aligned hybrid composites. The aligned hybrid composites also exhibit a non-linear pseudo-ductile response due to subcritical progressive damage compared to the catastrophic brittle failure of the baseline non-hybrid E-glass and non-aligned hybrid composites, despite the tensile strength knockdown (up to −40.3%) due to premature inter-tow debonding. They also display increased stiffness up to 90%.

Discontinuous reinforcement, fibre tow alignment, hybrid composites, mechanical testing
0021-9983
1-15
Gan, Khong Wui
b0c1e988-d375-4bbc-acdc-c77a6da1f904
Ho, You Wei
bf2b7395-c153-453b-85a9-6435741d6b57
Ow, Zheng Yang
b3872aa3-4d69-4bc1-b5bb-eacb673bff6f
Israr, Haris Ahmad
c5660cc8-a748-4e9f-8ac2-9925f3f8b32f
Wong, King Jye
2dd6e2bb-00dc-40cd-8ccb-cd111bd4c553
Gan, Khong Wui
b0c1e988-d375-4bbc-acdc-c77a6da1f904
Ho, You Wei
bf2b7395-c153-453b-85a9-6435741d6b57
Ow, Zheng Yang
b3872aa3-4d69-4bc1-b5bb-eacb673bff6f
Israr, Haris Ahmad
c5660cc8-a748-4e9f-8ac2-9925f3f8b32f
Wong, King Jye
2dd6e2bb-00dc-40cd-8ccb-cd111bd4c553

Gan, Khong Wui, Ho, You Wei, Ow, Zheng Yang, Israr, Haris Ahmad and Wong, King Jye (2019) Aligned discontinuous carbon fibre tows in hybrid composites and their tensile behaviour: an experimental study. Journal of Composite Materials, 1-15. (doi:10.1177/0021998319849697).

Record type: Article

Abstract

The paper aims to explore potential higher value applications of discontinuous carbon fibre tows. A vibration-assisted dry alignment method is presented to align the discontinuous fibre tows between conventional dry reinforcement mats/fabrics to fabricate cost-effective hybrid composites. Its viability is demonstrated by successful fabrication of two hybrid composite panels, where thin layers of aligned 12 mm discontinuous carbon fibre tows were deposited between E-glass chopped strand mats or woven fabrics respectively, via an out-of-autoclave resin infusion process; 54% and 81% of the fibre tows were aligned in the range of ±5° and ±10°, respectively. The tensile test results clearly demonstrate the importance of having the discontinuous fibre tows highly aligned in the hybrid composites, which shows increased stiffness (up to 24.4%) and strength (up to 59.9%) over the non-aligned hybrid composites. The aligned hybrid composites also exhibit a non-linear pseudo-ductile response due to subcritical progressive damage compared to the catastrophic brittle failure of the baseline non-hybrid E-glass and non-aligned hybrid composites, despite the tensile strength knockdown (up to −40.3%) due to premature inter-tow debonding. They also display increased stiffness up to 90%.

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More information

e-pub ahead of print date: 12 May 2019
Keywords: Discontinuous reinforcement, fibre tow alignment, hybrid composites, mechanical testing

Identifiers

Local EPrints ID: 433263
URI: http://eprints.soton.ac.uk/id/eprint/433263
ISSN: 0021-9983
PURE UUID: 85ef87d2-84c5-428c-84b4-7b47e90d80d8

Catalogue record

Date deposited: 12 Aug 2019 16:30
Last modified: 16 Mar 2024 02:53

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Contributors

Author: Khong Wui Gan
Author: You Wei Ho
Author: Zheng Yang Ow
Author: Haris Ahmad Israr
Author: King Jye Wong

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