Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination

Jalalvand, M., Fotouhi, M. and Wisnom, M. R. (2017) Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination. Composites Science and Technology, 153, pp. 232-240. (doi:10.1016/j.compscitech.2017.10.011)

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Abstract

Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a new lay-up concept called ‘orientation-dispersed’ laminates to avoid this mode of damage in quasi-isotropic hybrids. It is shown that the energy release rates at the free-edges of orientation-dispersed layups are significantly lower than those in ‘orientation-blocked’ laminates. Finally, the experimental results from two quasi-isotropic layups with π/3 and π/4 intervals are presented showing a good pseudo-ductility with no free-edge delamination.

Item Type:Articles
Additional 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.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Mohammad
Authors: Jalalvand, M., Fotouhi, M., and Wisnom, M. R.
Subjects:T Technology > T Technology (General)
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 Science and Technology
Publisher:Elsevier
ISSN:0266-3538
ISSN (Online):1879-1050
Published Online:16 October 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Composites Science and Technology 153:232-240
Publisher Policy:Reproduced under a Creative Commons license

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