Fibre failure assessment in carbon fibre reinforced polymers under fatigue loading by synchrotron X-ray computed tomography
Fibre failure assessment in carbon fibre reinforced polymers under fatigue loading by synchrotron X-ray computed tomography
In situ fatigue experiments using synchrotron X-ray computed tomography (SRCT) are used to assess the underpinning micromechanisms of fibre failure in double notch carbon/epoxy coupons. Observations showed fibre breaks along the 0º ply splits, associated with the presence and failure of bridging fibres, as well as fibres failed in the bulk composite within the 0º plies. A tendency for cluster formation, with multiple adjacent breaks in the bulk composite was observed when higher peak loads were applied, exceeding 70% of the ultimate tensile strength. Ex situ fatigue tests were used to assess the accumulation and distribution of fibre breaks for different loading conditions, varying peak load and number of cycles. A direct comparison with the quasi-static case for an equivalent peak load, considering the same material system and geometry, has shown that fatigue produces a significantly higher number of fibre breaks. This supports the hypothesis that fibre breaks are indeed caused by the load cycling.
carbon fibre composite, fatigue, fibre failure, damage mechanics, synchrotron radiation computed tomography
157-164
Garcea, Serafina
1b643f49-4704-4621-a456-1ca22ad62bef
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
14 September 2016
Garcea, Serafina
1b643f49-4704-4621-a456-1ca22ad62bef
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Garcea, Serafina, Sinclair, Ian and Spearing, Simon
(2016)
Fibre failure assessment in carbon fibre reinforced polymers under fatigue loading by synchrotron X-ray computed tomography.
Composites Science and Technology, 133, .
(doi:10.1016/j.compscitech.2016.07.030).
Abstract
In situ fatigue experiments using synchrotron X-ray computed tomography (SRCT) are used to assess the underpinning micromechanisms of fibre failure in double notch carbon/epoxy coupons. Observations showed fibre breaks along the 0º ply splits, associated with the presence and failure of bridging fibres, as well as fibres failed in the bulk composite within the 0º plies. A tendency for cluster formation, with multiple adjacent breaks in the bulk composite was observed when higher peak loads were applied, exceeding 70% of the ultimate tensile strength. Ex situ fatigue tests were used to assess the accumulation and distribution of fibre breaks for different loading conditions, varying peak load and number of cycles. A direct comparison with the quasi-static case for an equivalent peak load, considering the same material system and geometry, has shown that fatigue produces a significantly higher number of fibre breaks. This supports the hypothesis that fibre breaks are indeed caused by the load cycling.
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More information
Accepted/In Press date: 29 July 2016
e-pub ahead of print date: 31 July 2016
Published date: 14 September 2016
Keywords:
carbon fibre composite, fatigue, fibre failure, damage mechanics, synchrotron radiation computed tomography
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 399391
URI: http://eprints.soton.ac.uk/id/eprint/399391
ISSN: 0266-3538
PURE UUID: e54136b9-d0be-456c-8f3d-0e4f708f9efd
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Date deposited: 15 Aug 2016 13:29
Last modified: 15 Mar 2024 05:48
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Author:
Serafina Garcea
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