Flaw and damage assessment in torsionally loaded CFRP cylinders using experimental and numerical methods
Flaw and damage assessment in torsionally loaded CFRP cylinders using experimental and numerical methods
CFRP structural elements are prone to failure initiating from defects. While defects are expected after damage has occurred, flaws and voids can already be present after manufacturing. To study the criticality of such defects, CFRP cylinders have been manufactured from a lay-up that was designed to predict damage mode and to allow for controlled damage growth under torsional load. FEA simulations of defect-free and flawed cylinder models were performed to first ply/interface failure. X-ray computed tomography revealed that cylinders manufactured with different finishing had a completely different void content and distribution. Simulations of failure, using finite element models, for the two classes of void distribution are corroborated by experimental results for the ultimate load, and damage initiation from manufacturing flaws is confirmed. Digital speckle pattern interferometry was used to identify flaws using thermal and mechanical loading, while infrared thermography and thermoelastic stress analysis were used to identify possible failure initiation sites and monitor the failure process and damage growth, whilst the specimen was loaded in torsion.
A. carbon fibre, B. defects, C. finite element analysis (FEA), D. non-destructive testing
109-121
Hack, Erwin
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Fruehmann, Richard K.
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Roos, René
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Feligiotti, Mara
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Schuetz, Philipp
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Tyler, John P.
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Dulieu-Barton, Janice M.
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15 November 2015
Hack, Erwin
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Fruehmann, Richard K.
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Roos, René
178ccb72-06f7-47e0-bba9-9b9c4b94508f
Feligiotti, Mara
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Schuetz, Philipp
ad48627c-d757-419c-bda1-a44b620bdd25
Tyler, John P.
cf57f8df-bb86-42cf-af92-4ac0e53b1540
Dulieu-Barton, Janice M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Hack, Erwin, Fruehmann, Richard K., Roos, René, Feligiotti, Mara, Schuetz, Philipp, Tyler, John P. and Dulieu-Barton, Janice M.
(2015)
Flaw and damage assessment in torsionally loaded CFRP cylinders using experimental and numerical methods.
Composite Structures, 132, .
(doi:10.1016/j.compstruct.2015.05.025).
Abstract
CFRP structural elements are prone to failure initiating from defects. While defects are expected after damage has occurred, flaws and voids can already be present after manufacturing. To study the criticality of such defects, CFRP cylinders have been manufactured from a lay-up that was designed to predict damage mode and to allow for controlled damage growth under torsional load. FEA simulations of defect-free and flawed cylinder models were performed to first ply/interface failure. X-ray computed tomography revealed that cylinders manufactured with different finishing had a completely different void content and distribution. Simulations of failure, using finite element models, for the two classes of void distribution are corroborated by experimental results for the ultimate load, and damage initiation from manufacturing flaws is confirmed. Digital speckle pattern interferometry was used to identify flaws using thermal and mechanical loading, while infrared thermography and thermoelastic stress analysis were used to identify possible failure initiation sites and monitor the failure process and damage growth, whilst the specimen was loaded in torsion.
Text
Hack_Flaw.pdf
- Accepted Manuscript
Text
CompStruct_submission_2015-04-17.pdf
- Author's Original
More information
e-pub ahead of print date: 14 May 2015
Published date: 15 November 2015
Keywords:
A. carbon fibre, B. defects, C. finite element analysis (FEA), D. non-destructive testing
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 377194
URI: http://eprints.soton.ac.uk/id/eprint/377194
ISSN: 0263-8223
PURE UUID: df74b0fb-a966-417e-b792-87334c625a75
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Date deposited: 27 May 2015 11:33
Last modified: 15 Mar 2024 05:16
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Contributors
Author:
Erwin Hack
Author:
Richard K. Fruehmann
Author:
René Roos
Author:
Mara Feligiotti
Author:
Philipp Schuetz
Author:
John P. Tyler
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