Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates
Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates
Notch sensitivity, free edge delamination and brittle failure are limiting factors for the wider use of conventional composite laminates. In our previous study, a hybrid layup concept with the different materials blocked together but with dispersed orientations was successfully used to design pseudo-ductile hybrid composites with no free-edge delamination. This study introduces a comprehensive set of designed and characterised orientation-dispersed pseudo-ductile thin-ply hybrid composites to address notch sensitivity, another important limiting factor in conventional composite laminates. Un-notched, open-hole and sharp notched tension tests were performed on three different thin-ply carbon/glass hybrid configurations. The investigated laminates showed a successful pseudo-ductile un-notched behaviour with improved notch-insensitivity and suppression of free-edge delamination that was an undesirable damage mode in previously investigated hybrids with plies of the same orientation blocked together. This notch insensitivity results from subcritical damage in the laminates due to the pseudo-ductile damage mechanisms, i.e. dispersed delamination and fragmentation. These damage mechanisms can eliminate stress concentrations near the notch and suppress the conventional damage mechanisms that govern the notched response of the laminates.
carbon fibre, glass fiber, fragmentation
29-44
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
1 July 2018
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Fotouhi, Mohamad, Jalalvand, Meisam and Wisnom, Michael R.
(2018)
Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates.
Composites Part A: Applied Science and Manufacturing, 110, .
(doi:10.1016/j.compositesa.2018.04.012).
Abstract
Notch sensitivity, free edge delamination and brittle failure are limiting factors for the wider use of conventional composite laminates. In our previous study, a hybrid layup concept with the different materials blocked together but with dispersed orientations was successfully used to design pseudo-ductile hybrid composites with no free-edge delamination. This study introduces a comprehensive set of designed and characterised orientation-dispersed pseudo-ductile thin-ply hybrid composites to address notch sensitivity, another important limiting factor in conventional composite laminates. Un-notched, open-hole and sharp notched tension tests were performed on three different thin-ply carbon/glass hybrid configurations. The investigated laminates showed a successful pseudo-ductile un-notched behaviour with improved notch-insensitivity and suppression of free-edge delamination that was an undesirable damage mode in previously investigated hybrids with plies of the same orientation blocked together. This notch insensitivity results from subcritical damage in the laminates due to the pseudo-ductile damage mechanisms, i.e. dispersed delamination and fragmentation. These damage mechanisms can eliminate stress concentrations near the notch and suppress the conventional damage mechanisms that govern the notched response of the laminates.
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More information
Accepted/In Press date: 13 April 2018
e-pub ahead of print date: 16 April 2018
Published date: 1 July 2018
Keywords:
carbon fibre, glass fiber, fragmentation
Identifiers
Local EPrints ID: 446796
URI: http://eprints.soton.ac.uk/id/eprint/446796
ISSN: 1359-835X
PURE UUID: 01894138-677a-434b-b6b4-0856a177a770
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Date deposited: 23 Feb 2021 17:30
Last modified: 17 Mar 2024 04:02
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Author:
Mohamad Fotouhi
Author:
Michael R. Wisnom
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