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Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates

Fotouhi, Mohamad; Jalalvand, Meisam; Wisnom, Michael R.

Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates Thumbnail


Authors

Mohamad Fotouhi

Meisam Jalalvand

Michael R. Wisnom



Abstract

© 2018 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.

Journal Article Type Article
Acceptance Date Apr 13, 2018
Online Publication Date Apr 16, 2018
Publication Date Jul 1, 2018
Deposit Date Apr 19, 2018
Publicly Available Date Apr 16, 2019
Journal Composites Part A: Applied Science and Manufacturing
Print ISSN 1359-835X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 110
Pages 29-44
DOI https://doi.org/10.1016/j.compositesa.2018.04.012
Keywords glass fibres, carbon fibres, A. carbon fibres, hybrid, fragmentation
Public URL https://uwe-repository.worktribe.com/output/863807
Publisher URL http://dx.doi.org/10.1016/j.compositesa.2018.04.012
Additional Information Additional Information : This is the author's accepted manuscript. The final published version is available here: http://dx.doi.org/10.1016/j.compositesa.2018.04.012
Contract Date Apr 19, 2018

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