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An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates

Damghani, Mahdi; Saddler, John; Sammon, Ethan; Atkinson, Gary A.; Matthews, Jason; Murphy, Adrian

An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates Thumbnail


Authors

Mahdi Damghani Mahdi.Damghani@uwe.ac.uk
Senior Lecturer in Aerostructures

John Saddler

Ethan Sammon

Adrian Murphy



Abstract

This paper investigates the effect of transverse impact loading on the in-plane shear behaviour of two laminate configurations. The extensive experimental studies consider a pure carbon laminate (type 1) and a novel X-shaped carbon/glass laminate (type 2). The results establish that all three graduated impact energy levels (5J, 7.5J and 10J) induce through-thickness matrix cracking, fibre breakage and delamination in the type 1 laminate. However, the use of glass plies in the type 2 laminates resulted in only matrix cracking towards the impacted surface and limited through-thickness damage. Post impact, both laminate types demonstrated lower buckling load, failure load and stiffness. The reduction in buckling load of the type 1 specimens was greater than that of the type 2 specimens. However, the reduction in failure load of the type 1 specimens was less than that seen in the type 2 specimens. Both laminate types demonstrated a stable post-buckling equilibrium path. A novel machine vision technique based on polarisation imaging was successful in standardising the process of identifying the damage location/size for the type 1 laminates, but not for the type 2 laminates. This was due to the inclusion of surface glass plies which, unlike carbon plies, do not polarise light at the point of reflection.

Citation

Damghani, M., Saddler, J., Sammon, E., Atkinson, G. A., Matthews, J., & Murphy, A. (2023). An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates. Composite Structures, 305, 116506. https://doi.org/10.1016/j.compstruct.2022.116506

Journal Article Type Article
Acceptance Date Nov 24, 2022
Publication Date Feb 1, 2023
Deposit Date Nov 28, 2022
Publicly Available Date Nov 29, 2022
Journal Composite Structures
Print ISSN 0263-8223
Electronic ISSN 1879-1085
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 305
Pages 116506
DOI https://doi.org/10.1016/j.compstruct.2022.116506
Keywords Composite laminates; Low velocity impact ;Shear loading ;Impact behaviour
Public URL https://uwe-repository.worktribe.com/output/10194634
Publisher URL https://www.sciencedirect.com/science/article/pii/S0263822322012387

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