Jiayun Chen
Failure analysis of unidirectional CFRP composites with the coupled effects of initial fibre waviness and voids under longitudinal compression
Chen, Jiayun; Wan, Lei; Nelms, Katherine; Allegri, Giuliano; Yang, Dongmin
Authors
Dr Ray Wan L.Wan@hull.ac.uk
Lecturer in Mechanical Engineering
Katherine Nelms
Giuliano Allegri
Dongmin Yang
Abstract
This research delves into the failure mechanisms exhibited by unidirectional Carbon Fiber Reinforced Polymer (CFRP) composites under longitudinal compression, while considering the interplay of three types of manufacturing-induced defects: initial waviness of fibres, void volume fraction, and void size. The study employs 3D high-fidelity intact representative volume element (RVE) models, incorporating the initial waviness of fibres and voids based on Micro-CT imaging. A novel algorithm is proposed to generate more accurate 3D void shapes, departing from conventional circular or triangular approximations. The results highlight the substantial influence of the initial waviness angle on the reduction of predicted compressive stiffness and strength. The volume and size of voids play a significant role in determining damage initiation within the composites. The failure mechanisms of the composite under the coupled effects of initial waviness of fibres and voids are discussed, exhibiting reasonable agreement with experimental observations.
Citation
Chen, J., Wan, L., Nelms, K., Allegri, G., & Yang, D. (2024). Failure analysis of unidirectional CFRP composites with the coupled effects of initial fibre waviness and voids under longitudinal compression. Composite Structures, 347, Article 118451. https://doi.org/10.1016/j.compstruct.2024.118451
| Journal Article Type | Article |
|---|---|
| Acceptance Date | Jul 31, 2024 |
| Online Publication Date | Aug 5, 2024 |
| Publication Date | Nov 1, 2024 |
| Deposit Date | Aug 17, 2024 |
| Publicly Available Date | Aug 19, 2024 |
| Journal | Composite Structures |
| Print ISSN | 0263-8223 |
| Electronic ISSN | 1879-1085 |
| Publisher | Elsevier |
| Peer Reviewed | Peer Reviewed |
| Volume | 347 |
| Article Number | 118451 |
| DOI | https://doi.org/10.1016/j.compstruct.2024.118451 |
| Keywords | Unidirectional composites; Fibre kinking; Waviness angle; Void volume fraction; Void size |
| Public URL | https://hull-repository.worktribe.com/output/4789108 |
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0
Copyright Statement
© 2024 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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