Fatigue micromechanism characterisation in carbon fibre reinforced polymers using synchrotron radiation computed tomography
Fatigue micromechanism characterisation in carbon fibre reinforced polymers using synchrotron radiation computed tomography
In situ synchrotron radiation computed tomography (SRCT) has been used to evaluate fatigue damage micromechanisms in [90/0]s carbon fibre reinforced epoxy double-edge notched specimens. Interactions between cracks and toughening particles have been identified within the epoxy, particularly: particles de-bonding ahead of the main crack tip, creating a preferential damage path, and the bridging of cracks by un-failed ligaments. The critical mechanism of fatigue crack growth appears to be the degradation of bridging ligaments in the crack wake. Damage has been quantified in terms of crack opening and shear displacements, and the results have been compared with corresponding damage occurring due to quasi-static loading of the same materials. The removal of bridging ligaments in fatigue loading results in higher, more uniform crack opening (and shear) displacements and less serrated crack fronts. These observations have potential implications for material development, damage resistant and damage tolerant structural design approaches
carbon fibres, fatigue behaviour, damage micromechanisms, crack bridging, synchrotron radiation computed tomography
23-30
Garcea, S.C.
835ab8bc-a234-4fbd-83e3-4f4fe9ca22bf
Mavrogordato, M.N.
f3e0879b-118a-463a-a130-1c890e9ab547
Scott, A.E.
37356844-61d7-450e-b33e-032c2c41903b
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
30 July 2014
Garcea, S.C.
835ab8bc-a234-4fbd-83e3-4f4fe9ca22bf
Mavrogordato, M.N.
f3e0879b-118a-463a-a130-1c890e9ab547
Scott, A.E.
37356844-61d7-450e-b33e-032c2c41903b
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Garcea, S.C., Mavrogordato, M.N., Scott, A.E., Sinclair, I. and Spearing, S.M.
(2014)
Fatigue micromechanism characterisation in carbon fibre reinforced polymers using synchrotron radiation computed tomography.
Composites Science and Technology, 99, .
(doi:10.1016/j.compscitech.2014.05.006).
Abstract
In situ synchrotron radiation computed tomography (SRCT) has been used to evaluate fatigue damage micromechanisms in [90/0]s carbon fibre reinforced epoxy double-edge notched specimens. Interactions between cracks and toughening particles have been identified within the epoxy, particularly: particles de-bonding ahead of the main crack tip, creating a preferential damage path, and the bridging of cracks by un-failed ligaments. The critical mechanism of fatigue crack growth appears to be the degradation of bridging ligaments in the crack wake. Damage has been quantified in terms of crack opening and shear displacements, and the results have been compared with corresponding damage occurring due to quasi-static loading of the same materials. The removal of bridging ligaments in fatigue loading results in higher, more uniform crack opening (and shear) displacements and less serrated crack fronts. These observations have potential implications for material development, damage resistant and damage tolerant structural design approaches
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Accepted/In Press date: 5 May 2014
e-pub ahead of print date: 14 May 2014
Published date: 30 July 2014
Keywords:
carbon fibres, fatigue behaviour, damage micromechanisms, crack bridging, synchrotron radiation computed tomography
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 383478
URI: http://eprints.soton.ac.uk/id/eprint/383478
ISSN: 0266-3538
PURE UUID: 6e8f3c67-2704-4420-bccb-a892b75eff77
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Date deposited: 13 Nov 2015 16:21
Last modified: 15 Mar 2024 03:18
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Contributors
Author:
S.C. Garcea
Author:
A.E. Scott
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