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Polysulfone nanofiber-modified composite laminates

Investigation of mode-I fatigue behavior and damage mechanisms

Journal Article (2023)
Author(s)

R. Mohammadi (TU Delft - Materials and Environment)

Roya Akrami (University of Strathclyde)

Maher Assaad (Ajman University)

Mohamed Nasor (Ajman University)

Ahmed Imran (Ajman University)

Mohammad Fotouhi (TU Delft - Materials and Environment)

Research Group
Materials and Environment
Copyright
© 2023 R. Mohammadi, R. Akrami, Maher Assaad, Mohamed Nasor, Ahmed Imran, M. Fotouhi
DOI related publication
https://doi.org/10.1016/j.tafmec.2023.104078
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 R. Mohammadi, R. Akrami, Maher Assaad, Mohamed Nasor, Ahmed Imran, M. Fotouhi
Research Group
Materials and Environment
Volume number
127
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Abstract

In this study, the fatigue properties of carbon fiber-reinforced polymer (CFRP) composite laminates were investigated, specifically focusing on the incorporation of 100-µm polysulfone (PSU) nanofibers as an interleaving material. The PSU nanofibers were produced using the electrospinning technique. Both quasi-static and fatigue tests were conducted on both the reference specimens and the modified specimens to evaluate their mode-I performance. The results revealed an 85% increase in fracture toughness (GIC) under quasi-static testing. The fatigue plots revealed a noteworthy reduction in the fatigue crack growth rate (da/dN) for the modified specimens due to new toughening mechanisms. Scanning electron microscopy (SEM) demonstrated that, the PSU nanofiber became melted and distributed in the interface, leading to phase separation and a sea-island structure. The presence of PSU microspheres caused crack deflection during delamination, which resulted in increased fracture and fatigue resistance.