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Design and characterisation of high performance, pseudo-ductile all-carbon/epoxy unidirectional hybrid composites

Design and characterisation of high performance, pseudo-ductile all-carbon/epoxy unidirectional hybrid composites
Design and characterisation of high performance, pseudo-ductile all-carbon/epoxy unidirectional hybrid composites
A variety of thin-ply pseudo-ductile unidirectional interlayer hybrid composite materials comprising high modulus and high strength thin carbon fibre/epoxy prepregs was investigated. The central high modulus carbon plies fragmented and delaminated stably from the outer high strength carbon layers under uniaxial tensile loading in the hybrid materials. These pseudo-ductility mechanisms resulted in favourable, metal-like stress-strain responses featuring pseudo-yielding, a stress plateau and further rise in stress before final failure. The high initial elastic modulus of up to 240 GPa, the early warning and the wide safety margin between damage initiation and final failure make the new hybrids advantageous for safety-critical applications where ultimate performance and low density are key design drivers. A hybrid effect with an increase in the failure strain of the high modulus carbon material was highlighted for very thin plies.
carbon fibre, delamination, fragmentation, mechanical testing, pseudo-ductility
1359-8368
348-356
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Czigány, Tibor
7800fb6b-4598-4240-9950-1a5a951f6675
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Czigány, Tibor
7800fb6b-4598-4240-9950-1a5a951f6675

Czél, Gergely, Jalalvand, Meisam, Wisnom, Michael R. and Czigány, Tibor (2017) Design and characterisation of high performance, pseudo-ductile all-carbon/epoxy unidirectional hybrid composites. Composites Part B: Engineering, 111, 348-356. (doi:10.1016/j.compositesb.2016.11.049).

Record type: Article

Abstract

A variety of thin-ply pseudo-ductile unidirectional interlayer hybrid composite materials comprising high modulus and high strength thin carbon fibre/epoxy prepregs was investigated. The central high modulus carbon plies fragmented and delaminated stably from the outer high strength carbon layers under uniaxial tensile loading in the hybrid materials. These pseudo-ductility mechanisms resulted in favourable, metal-like stress-strain responses featuring pseudo-yielding, a stress plateau and further rise in stress before final failure. The high initial elastic modulus of up to 240 GPa, the early warning and the wide safety margin between damage initiation and final failure make the new hybrids advantageous for safety-critical applications where ultimate performance and low density are key design drivers. A hybrid effect with an increase in the failure strain of the high modulus carbon material was highlighted for very thin plies.

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More information

Published date: 15 February 2017
Keywords: carbon fibre, delamination, fragmentation, mechanical testing, pseudo-ductility

Identifiers

Local EPrints ID: 446782
URI: http://eprints.soton.ac.uk/id/eprint/446782
ISSN: 1359-8368
PURE UUID: 9978c54f-715a-4a2b-a769-9d4c0de7d82f
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 22 Feb 2021 17:32
Last modified: 23 Feb 2021 02:58

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Contributors

Author: Gergely Czél
Author: Michael R. Wisnom
Author: Tibor Czigány

University divisions

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