dc.contributor.author | Thorn, TDS | |
dc.contributor.author | Wang, Y | |
dc.contributor.author | Guo, H | |
dc.contributor.author | Lu, L | |
dc.contributor.author | Liu, Y | |
dc.contributor.author | Bilotti, E | |
dc.contributor.author | Papageorgiou, DG | |
dc.contributor.author | Zhang, H | |
dc.date.accessioned | 2024-06-28T08:07:15Z | |
dc.date.available | 2024-06-28T08:07:15Z | |
dc.date.issued | 2024-06-16 | |
dc.identifier.citation | Thomas D.S. Thorn, Yushen Wang, Hongxu Guo, Lichang Lu, Yi Liu, Emiliano Bilotti, Dimitrios G. Papageorgiou, Han Zhang, Discontinuous interleaving strategies for toughening, damage sensing and repair in multifunctional carbon fibre/epoxy composites, Composites Part A: Applied Science and Manufacturing, Volume 185, 2024, 108320, ISSN 1359-835X, https://doi.org/10.1016/j.compositesa.2024.108320. (https://www.sciencedirect.com/science/article/pii/S1359835X24003178) Abstract: Thermoplastic interleaving is a well-established approach to toughen carbon fibre thermoset laminates, studied over the past five decades. Recently, it has been revisited to create functional smart composites with damage sensing and repair capabilities with a renewed focus on the sustainability and longevity of components. However, the introduction of thermoplastic films within the interlaminar region often lowers fibre volume fraction and performance at elevated temperature, while the addition of impermeable continuous films during manufacture may also limit compatible fabrication methods. Moreover, the incorporation of dielectric thermoplastic films inevitably reduces through-thickness electrical conductivity and prevents accurate damage sensing of delamination in carbon fibre laminates. In this study, strategies of using discontinuous interleaving to improve both fracture toughness and thermomechanical properties of carbon fibre epoxy laminates, with the ability to monitor delamination damage and restore mechanical properties after a short healing step have been explored. Both the interleaving design and the physical properties of the thermoplastic were assessed, which has not been addressed previously. Interleaving high molecular weight thermoplastic with decreasing interleaf width and distance between interleaf zones results in increased fracture toughness (+347 %), by creating a superior toughened interlaminar zone, forcing a migration of delamination into the intralaminar region. A repair efficiency of 77 % was achieved when using a lower molecular weight of thermoplastic; however, the lack of thermoplastic over the entire fracture surface area affects the repairing performance universally. Damage sensing and thermomechanical properties were significantly improved compared to continuous interleaving, demonstrating that discontinuous thermoplastic interleaving strategies offer a favourable combination of toughening, thermal performance and accurate damage sensing for multifunctional high-performance composites. Keywords: Multifunctional composites; Fracture toughness; Damage sensing; Easy repair | en_US |
dc.identifier.issn | 1359-835X | |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/97739 | |
dc.description.abstract | Thermoplastic interleaving is a well-established approach to toughen carbon fibre thermoset laminates, studied over the past five decades. Recently, it has been revisited to create functional smart composites with damage sensing and repair capabilities with a renewed focus on the sustainability and longevity of components. However, the introduction of thermoplastic films within the interlaminar region often lowers fibre volume fraction and performance at elevated temperature, while the addition of impermeable continuous films during manufacture may also limit compatible fabrication methods. Moreover, the incorporation of dielectric thermoplastic films inevitably reduces through-thickness electrical conductivity and prevents accurate damage sensing of delamination in carbon fibre laminates. In this study, strategies of using discontinuous interleaving to improve both fracture toughness and thermomechanical properties of carbon fibre epoxy laminates, with the ability to monitor delamination damage and restore mechanical properties after a short healing step have been explored. Both the interleaving design and the physical properties of the thermoplastic were assessed, which has not been addressed previously. Interleaving high molecular weight thermoplastic with decreasing interleaf width and distance between interleaf zones results in increased fracture toughness (+347 %), by creating a superior toughened interlaminar zone, forcing a migration of delamination into the intralaminar region. A repair efficiency of 77 % was achieved when using a lower molecular weight of thermoplastic; however, the lack of thermoplastic over the entire fracture surface area affects the repairing performance universally. Damage sensing and thermomechanical properties were significantly improved compared to continuous interleaving, demonstrating that discontinuous thermoplastic interleaving strategies offer a favourable combination of toughening, thermal performance and accurate damage sensing for multifunctional high-performance composites. | en_US |
dc.format.extent | 108320 - ? | |
dc.publisher | Elsevier | en_US |
dc.relation.ispartof | Composites Part A Applied Science and Manufacturing | |
dc.rights | © 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | Discontinuous interleaving strategies for toughening, damage sensing and repair in multifunctional carbon fibre/epoxy composites | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.compositesa.2024.108320 | |
pubs.notes | Not known | en_US |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |
qmul.funder | ESTEEM: Energy efficient and Safe out-of-oven manufacTuring for compositE materials with intEgrated Multifunctionalities::Engineering and Physical Sciences Research Council | en_US |