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Understanding the sequence of damage in complex hybrid composite metallic structures subject to out-of-plane loading investigated using computed tomography

Understanding the sequence of damage in complex hybrid composite metallic structures subject to out-of-plane loading investigated using computed tomography
Understanding the sequence of damage in complex hybrid composite metallic structures subject to out-of-plane loading investigated using computed tomography
The progression of damage in a hybrid composite-metallic structure subject to out-of-plane loading has been examined throughout an interrupted quasi-static-indentation test using micro-focus computed tomography for damage assessment. Two key damage events were identified from the load displacement tests. The CT data shows that the first damage mechanisms to occur are yielding of the aluminum substrate and matrix cracking in the CFRP; the onset of these damage mechanisms occurs at a similar point in the loading process. With increasing load, delamination occurred between all plies in the CFRP layer. The bonded interface between the aluminum and CFRP was maintained at lower loads - a crack initiated preferentially within the innermost CFRP ply rather than at the interface between the two materials. The CT data indicates that the second damage event on the load displacement curve can be attributed to CFRP fibre fracture, consistent with contact forces. This work indicates that relatively low-level out-of-plane loads are likely to cause plastic deformation to the aluminum substrate, whilst the integrity of the fibre in the CFRP is maintained until higher loads.
Allen, Trevor
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Ahmed, Sharif
ddc6bab1-9d76-4391-b7ea-ae68d6f3924d
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Allen, Trevor
3b152fc9-4013-4a41-9d8f-ff38aba5330c
Ahmed, Sharif
ddc6bab1-9d76-4391-b7ea-ae68d6f3924d
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a

Allen, Trevor, Ahmed, Sharif, Reed, P.A.S., Sinclair, I. and Spearing, S.M. (2015) Understanding the sequence of damage in complex hybrid composite metallic structures subject to out-of-plane loading investigated using computed tomography. 20th International Conference on Composite Materials, Denmark. 19 - 24 Jul 2015. (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

The progression of damage in a hybrid composite-metallic structure subject to out-of-plane loading has been examined throughout an interrupted quasi-static-indentation test using micro-focus computed tomography for damage assessment. Two key damage events were identified from the load displacement tests. The CT data shows that the first damage mechanisms to occur are yielding of the aluminum substrate and matrix cracking in the CFRP; the onset of these damage mechanisms occurs at a similar point in the loading process. With increasing load, delamination occurred between all plies in the CFRP layer. The bonded interface between the aluminum and CFRP was maintained at lower loads - a crack initiated preferentially within the innermost CFRP ply rather than at the interface between the two materials. The CT data indicates that the second damage event on the load displacement curve can be attributed to CFRP fibre fracture, consistent with contact forces. This work indicates that relatively low-level out-of-plane loads are likely to cause plastic deformation to the aluminum substrate, whilst the integrity of the fibre in the CFRP is maintained until higher loads.

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ICCMPaper_TA_150701-2551.pdf - Accepted Manuscript
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More information

Accepted/In Press date: 20 July 2015
Venue - Dates: 20th International Conference on Composite Materials, Denmark, 2015-07-19 - 2015-07-24
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 379866
URI: https://eprints.soton.ac.uk/id/eprint/379866
PURE UUID: 4f023b77-d32e-4f75-afb9-af2cdb421c43
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347
ORCID for S.M. Spearing: ORCID iD orcid.org/0000-0002-3059-2014

Catalogue record

Date deposited: 01 Sep 2015 13:57
Last modified: 17 May 2019 00:35

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Contributors

Author: Trevor Allen
Author: Sharif Ahmed
Author: P.A.S. Reed ORCID iD
Author: I. Sinclair
Author: S.M. Spearing ORCID iD

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