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

Fotouhi, M. , Jalalvand, M. and Wisnom, M. R. (2018) Notch insensitive orientation-dispersed pseudo-ductile thin-ply carbon/glass hybrid laminates. Composites Part A: Applied Science and Manufacturing, 110, pp. 29-44. (doi:10.1016/j.compositesa.2018.04.012)

[img]
Preview
Text
196771.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

3MB

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.

Item Type:Articles
Additional Information:This work was funded under the UK Engineering and Physical Sciences Research Council (EPSRC) Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College, London.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Mohammad
Authors: Fotouhi, M., Jalalvand, M., and Wisnom, M. R.
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Composites Part A: Applied Science and Manufacturing
Publisher:Elsevier
ISSN:1359-835X
ISSN (Online):1878-5840
Published Online:16 April 2018
Copyright Holders:Copyright © 2018 Crown Copyright
First Published:First published in Composites Part A: Applied Science and Manufacturing 110: 29-44
Publisher Policy:Reproduced in accordance with the publisher copyright policy

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
0UNSPECIFIED