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High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour loaded off-axis

High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour loaded off-axis
High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour loaded off-axis
The aim of this work was to investigate the effect of loading angle variation on the pseudo-ductility of quasi-isotropic (QI) hybrid composite laminates. Previously, hybrids of thin-ply carbon fibres and standard glass fibres were found to have an excellent pseudo-ductile behaviour both in unidirectional (UD) and QI configurations when subjected to axial tension in the fibres’ orientations. In this work, the QI laminates, with 60° intervals, have been subjected to a quasi-static tensile load at various off-axis orientations – i.e. 5°, 10° and 20°. The QI hybrid composites were made by sandwiching a QI T300-carbon laminate between the two halves of a QI S-glass laminate. The results showed a pseudo-ductile behaviour with a linear elastic part and a desirable plateau for all the loading directions, however the pseudo-ductile strain decreases when increasing the off-axis angle. Comparing the 20° off-axis with the other cases, there was more active matrix cracking damage before fragmentation in the 20° off-axis plies and it failed earlier than the other samples. Acoustic emission (AE) results confirmed this, with more matrix cracking related AE signals in the 20° off-axis case compared to the other configurations.
Acoustic emission, Fragmentation, Hybrid composites, Off-axis, Pseudo-ductility
0263-8223
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Saeedifar, Milad
4915d58c-6442-44d9-85f9-793182919c34
Xiao, Bill
2f4b1a30-73cf-4c89-b5e9-e2bfc34eba6e
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Saeedifar, Milad
4915d58c-6442-44d9-85f9-793182919c34
Xiao, Bill
2f4b1a30-73cf-4c89-b5e9-e2bfc34eba6e
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a

Fotouhi, Mohamad, Jalalvand, Meisam, Saeedifar, Milad, Xiao, Bill and Wisnom, Michael R. (2020) High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour loaded off-axis. Composite Structures, 247, [112444]. (doi:10.1016/j.compstruct.2020.112444).

Record type: Article

Abstract

The aim of this work was to investigate the effect of loading angle variation on the pseudo-ductility of quasi-isotropic (QI) hybrid composite laminates. Previously, hybrids of thin-ply carbon fibres and standard glass fibres were found to have an excellent pseudo-ductile behaviour both in unidirectional (UD) and QI configurations when subjected to axial tension in the fibres’ orientations. In this work, the QI laminates, with 60° intervals, have been subjected to a quasi-static tensile load at various off-axis orientations – i.e. 5°, 10° and 20°. The QI hybrid composites were made by sandwiching a QI T300-carbon laminate between the two halves of a QI S-glass laminate. The results showed a pseudo-ductile behaviour with a linear elastic part and a desirable plateau for all the loading directions, however the pseudo-ductile strain decreases when increasing the off-axis angle. Comparing the 20° off-axis with the other cases, there was more active matrix cracking damage before fragmentation in the 20° off-axis plies and it failed earlier than the other samples. Acoustic emission (AE) results confirmed this, with more matrix cracking related AE signals in the 20° off-axis case compared to the other configurations.

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More information

Accepted/In Press date: 1 May 2020
e-pub ahead of print date: 7 May 2020
Published date: 1 September 2020
Additional Information: Funding Information: This work was funded under the UK Engineering and Physical Sciences Research Council (EPSRC) Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College, London. The authors acknowledge Hexcel Corporation for supplying glass fibre material for this research. The data necessary to support the conclusions are included in the paper. Publisher Copyright: © 2020 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Keywords: Acoustic emission, Fragmentation, Hybrid composites, Off-axis, Pseudo-ductility

Identifiers

Local EPrints ID: 446874
URI: http://eprints.soton.ac.uk/id/eprint/446874
ISSN: 0263-8223
PURE UUID: a704018c-19e4-46e5-a508-04873fee5c99
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

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Date deposited: 25 Feb 2021 17:30
Last modified: 16 Sep 2021 11:14

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Contributors

Author: Mohamad Fotouhi
Author: Milad Saeedifar
Author: Bill Xiao
Author: Michael R. Wisnom

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