Multi-directional hybrid laminates - studying the effect of fragmentation and dispersed delamination on stress-strain curves of unnotched laminates using analytical modelling
Multi-directional hybrid laminates - studying the effect of fragmentation and dispersed delamination on stress-strain curves of unnotched laminates using analytical modelling
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 pseudo-ductile strain. 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 UniDirectional (UD) laminates which are not usually applied in industry due to poor transverse mechanical properties. In this study, the behaviour of multi-directional hybrid laminates made with UD hybrid sub-laminates is studied. The final goal is to introduce pseudo-ductility to layups with wider industrial applications. The effect of layup as well as the UD building-block stress-strain curve on the final stress-strain curve of the laminate is also studied. A new analytical approach based on Classical Laminate Theory is introduced in which the effect of different damage modes in UD hybrid laminates (fragmentation and dispersed delamination) is taken into account. The output of this method is the non-linear stress-strain curve of a multi-directional laminate with UD hybrid sub-laminates. This method is then used to study the effect of different parameters such as the mechanical properties of the constituents (low and high strain materials) and layup on the pseudo-ductility.
Dispersed delamination, Fragmentation, Hybrid composites, Pseudo-ductility
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
24 July 2015
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Czél, Gergely
f6a95d06-75a3-4ca8-8912-098395a6eb80
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Jalalvand, Meisam, Czél, Gergely and Wisnom, Michael R.
(2015)
Multi-directional hybrid laminates - studying the effect of fragmentation and dispersed delamination on stress-strain curves of unnotched laminates using analytical modelling.
20th International Conference on Composite Materials, ICCM 2015, , Copenhagen, Denmark.
19 - 24 Jul 2015.
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 pseudo-ductile strain. 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 UniDirectional (UD) laminates which are not usually applied in industry due to poor transverse mechanical properties. In this study, the behaviour of multi-directional hybrid laminates made with UD hybrid sub-laminates is studied. The final goal is to introduce pseudo-ductility to layups with wider industrial applications. The effect of layup as well as the UD building-block stress-strain curve on the final stress-strain curve of the laminate is also studied. A new analytical approach based on Classical Laminate Theory is introduced in which the effect of different damage modes in UD hybrid laminates (fragmentation and dispersed delamination) is taken into account. The output of this method is the non-linear stress-strain curve of a multi-directional laminate with UD hybrid sub-laminates. This method is then used to study the effect of different parameters such as the mechanical properties of the constituents (low and high strain materials) and layup on the pseudo-ductility.
Text
Multi-directional_hybrid_laminates
More information
Published date: 24 July 2015
Additional Information:
Funding Information:
This work was funded under the UK Engineering and Physical Sciences Research Council Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College, London. Gergely Czél acknowledges the Hungarian Academy of Sciences for funding through the Post-Doctoral Researcher Programme fellowship scheme.
Publisher Copyright:
© 2015 International Committee on Composite Materials. All rights reserved.
Venue - Dates:
20th International Conference on Composite Materials, ICCM 2015, , Copenhagen, Denmark, 2015-07-19 - 2015-07-24
Keywords:
Dispersed delamination, Fragmentation, Hybrid composites, Pseudo-ductility
Identifiers
Local EPrints ID: 477807
URI: http://eprints.soton.ac.uk/id/eprint/477807
PURE UUID: 2c8f0ea8-e405-4f4c-b3a0-46bb97add7ca
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Date deposited: 14 Jun 2023 17:00
Last modified: 18 Mar 2024 03:57
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Contributors
Author:
Gergely Czél
Author:
Michael R. Wisnom
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