On the influence of non-woven carbon veils with different binders on mode-I interlaminar fracture toughness of carbon fibre/epoxy composite laminates

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Abstract

The objective of this research is to investigate the effect of non-woven carbon veils with different binders on the interlaminar fracture toughness under mode-I condition. The non-woven carbon veils with the same areal weight (i.e. 10 gsm) of four different binders including polyvinyl alcohol (PVOH), Polyester (PET), cross-linked PET (xPET), and cross-linked styrene-acrylic (xSA) were chosen as the interleaf for the carbon fibre/epoxy laminates manufactured by vacuum resin assisted infusion and out-of-autoclave curing. Double Cantilever Beam (DCB) tests were used to obtain the mode-I fracture energies and R-curves. Fractography was carried out to characterize the toughening mechanisms. The results demonstrated that the binders influenced the toughening performance of the non-woven carbon veils. Although all the toughed laminates exhibited relatively flat R-curves, the carbon veil with PET binder gave the best toughening performance with an increase of 52% and 56% for fracture initiation and propagation energies, while the carbon veil with PVOH had the poorest performance with a decrease of 18% and 17% for fracture initiation and propagation energies compared to those of the baseline.
Original languageEnglish
Pages73-205
Number of pages131
Publication statusPublished - 22 Jul 2022
Event25th International Conference on Composite Structures - Faculty of Engineering, University of Porto, Porto, Portugal
Duration: 19 Jul 202222 Jul 2022
https://www.iccs25online.com

Conference

Conference25th International Conference on Composite Structures
Abbreviated titleICCS25
Country/TerritoryPortugal
CityPorto
Period19/07/2222/07/22
Internet address

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