Toughening behavior of carbon/epoxy laminates interleaved by PSF/PVDF composite nanofibers

Saghafi, Hamed and Palazzetti, Roberto and Heidary, Hossein and Brugo, Tommaso Maria and Zucchelli, Andrea and Minak, Giangiacomo (2020) Toughening behavior of carbon/epoxy laminates interleaved by PSF/PVDF composite nanofibers. Applied Sciences, 10 (16). 5618. ISSN 2076-3417 (https://doi.org/10.3390/app10165618)

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Abstract

This paper presents an investigation on fracture behavior of carbon/epoxy composite laminates interleaved with electrospun nanofibers. Three different mats were manufactured and interleaved, using only polyvinylidene fluoride (PVDF), only polysulfone (PSF), and their combination. Mode-I and Mode-II fracture mechanics tests were conducted on virgin and nanomodified samples, and the results showed that PVDF and PSF nanofibers enhance the Mode-I critical energy release rate (GIC) by 66% and 51%, respectively, while using a combination of the two registered a 78% increment. The same phenomenon occurred under Mode-II loading. SEM micrographs were taken, to investigate the toughening mechanisms provided by the nanofibers.

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