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Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination

Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination
Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination
Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a new lay-up concept called ‘orientation-dispersed’ laminates to avoid this mode of damage in quasi-isotropic hybrids. It is shown that the energy release rates at the free-edges of orientation-dispersed layups are significantly lower than those in ‘orientation-blocked’ laminates. Finally, the experimental results from two quasi-isotropic layups with π/3 and π/4 intervals are presented showing a good pseudo-ductility with no free-edge delamination.
finite element analysis (FEA), fragmentation, hybrid composites, non-linear behaviour, stress/strain curves
0266-3538
232-240
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a

Jalalvand, Meisam, Fotouhi, Mohamad and Wisnom, Michael R. (2017) Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination. Composites Science and Technology, 153, 232-240. (doi:10.1016/j.compscitech.2017.10.011).

Record type: Article

Abstract

Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a new lay-up concept called ‘orientation-dispersed’ laminates to avoid this mode of damage in quasi-isotropic hybrids. It is shown that the energy release rates at the free-edges of orientation-dispersed layups are significantly lower than those in ‘orientation-blocked’ laminates. Finally, the experimental results from two quasi-isotropic layups with π/3 and π/4 intervals are presented showing a good pseudo-ductility with no free-edge delamination.

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More information

Accepted/In Press date: 14 October 2017
e-pub ahead of print date: 17 October 2017
Published date: 1 December 2017
Keywords: finite element analysis (FEA), fragmentation, hybrid composites, non-linear behaviour, stress/strain curves

Identifiers

Local EPrints ID: 446787
URI: http://eprints.soton.ac.uk/id/eprint/446787
ISSN: 0266-3538
PURE UUID: 2007877d-4f72-44c1-8ff7-ca7abb89b626
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 22 Feb 2021 17:33
Last modified: 23 Feb 2021 02:58

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Contributors

Author: Mohamad Fotouhi
Author: Michael R. Wisnom

University divisions

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