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The role of broken fibres on crack migration into 0° surface plies in adhesively bonded carbon fibre composite joints

Paul, Aakash; Xu, Xiaodong; Shimizu, Takayuki; Wisnom, Michael

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Authors

Aakash Paul

Dr Xiaodong Xu Xiaodong.Xu@uwe.ac.uk
Senior Lecturer in Engineering Principles

Takayuki Shimizu

Michael Wisnom



Abstract

Crack migration into the composite in adhesively bonded joints can cause a major degradation of strength. This usually occurs via cracks in the surface plies, but this paper demonstrates that crack migration can occur in joints even with 0° surface plies. The role of surface treatment is investigated by comparing grit blasted and plasma surface treatment before the secondary bonding process. Unidirectional Double Cantilever Beam specimens and quasi-isotropic Double Lap Joints with surface 0° plies were tested. It was found that with grit blasted specimens, crack migration occurred due to broken fibres present on the composite surface. Plasma treated specimens with no broken fibres on the surface failed in the adhesive with substantial increases in the Mode I fracture toughness and the strength of the double lap joints.

Citation

Paul, A., Xu, X., Shimizu, T., & Wisnom, M. (2021). The role of broken fibres on crack migration into 0° surface plies in adhesively bonded carbon fibre composite joints. Composite Structures, 276, Article 114530. https://doi.org/10.1016/j.compstruct.2021.114530

Journal Article Type Article
Acceptance Date Aug 4, 2021
Online Publication Date Aug 11, 2021
Publication Date Nov 15, 2021
Deposit Date Aug 4, 2021
Publicly Available Date Mar 28, 2024
Journal Composite Structures
Print ISSN 0263-8223
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 276
Article Number 114530
DOI https://doi.org/10.1016/j.compstruct.2021.114530
Keywords Adhesive Joints; Crack Migration; Delamination; Surface Treatments
Public URL https://uwe-repository.worktribe.com/output/7602565

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