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Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?: 17th European Conference on Composite Materials, ECCM 2016

Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?: 17th European Conference on Composite Materials, ECCM 2016
Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?: 17th European Conference on Composite Materials, ECCM 2016
Hybridisation is one of the approaches to introduce pseudo-ductility to brittle composite materials. In this approach, two or more different types of fibre are combined and if the configuration and material constituents are well selected, the tensile response shows a gradual failure and a metal-like stress-strain curve with a pseudo-yeild point. Different types of hybrid composites with continuous layers have been studied to produce pseudo-ductile tensile behaviour. However, most hybrid material studies to date have been focused on Uni-Directional (UD) laminates which are not usually applied in industry due to poor transverse mechanical properties. To make a multi-directional hybrid laminate, different approaches can be selected to mix different fibre types with different fibre orientations. In this paper, two approaches are presented and compared: (i) UD hybrid sublaminates used as the building blocks of hybrid laminates and (ii) dispersed orientation in which non-hybrid multi-directional sublaminates with different fibre types are stacked up. It is shown that the method of dispersed orientation significantly helps to reduce interlaminar stresses at the free edges of the tensile samples and therefore supresses free-edge delamination.
dispersed delamination, fragmentation, hybrid composites, pseudo-ductility
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a

Jalalvand, Meisam, Fotouhi, Mohamad, Czél, Gergely and Wisnom, Michael R. (2016) Avoiding free edge delamination in quasi-isotropic pseudo-ductile hybrid laminates - by material dispersion or layer angle dispersion?: 17th European Conference on Composite Materials, ECCM 2016. 17th European Conference on Composite Materials, ECCM 2016, , Munich, Germany. 25 - 29 Jun 2016.

Record type: Conference or Workshop Item (Paper)

Abstract

Hybridisation is one of the approaches to introduce pseudo-ductility to brittle composite materials. In this approach, two or more different types of fibre are combined and if the configuration and material constituents are well selected, the tensile response shows a gradual failure and a metal-like stress-strain curve with a pseudo-yeild point. Different types of hybrid composites with continuous layers have been studied to produce pseudo-ductile tensile behaviour. However, most hybrid material studies to date have been focused on Uni-Directional (UD) laminates which are not usually applied in industry due to poor transverse mechanical properties. To make a multi-directional hybrid laminate, different approaches can be selected to mix different fibre types with different fibre orientations. In this paper, two approaches are presented and compared: (i) UD hybrid sublaminates used as the building blocks of hybrid laminates and (ii) dispersed orientation in which non-hybrid multi-directional sublaminates with different fibre types are stacked up. It is shown that the method of dispersed orientation significantly helps to reduce interlaminar stresses at the free edges of the tensile samples and therefore supresses free-edge delamination.

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More information

Published date: 26 June 2016
Venue - Dates: 17th European Conference on Composite Materials, ECCM 2016, , Munich, Germany, 2016-06-25 - 2016-06-29
Keywords: dispersed delamination, fragmentation, hybrid composites, pseudo-ductility

Identifiers

Local EPrints ID: 446744
URI: http://eprints.soton.ac.uk/id/eprint/446744
PURE UUID: e1bdc721-7d84-4549-a2a3-6e441369cccc
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 19 Feb 2021 17:32
Last modified: 20 Feb 2021 02:59

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Contributors

Author: Mohamad Fotouhi
Author: Gergely Czél
Author: Michael R. Wisnom

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