Toughening efficiency and mechanism of carbon fibre epoxy matrix composites by PEK-C

Yao, Jiawei; Niu, Kangmin; Niu, Yifan; Zhang, Teng

doi:10.1016/j.compstruct.2019.111431

Cited by 28 publications

(16 citation statements)

References 22 publications

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“…Some studies have interleaved prepreg composites with polymer films and shown significant improvement in fracture toughness and impact resistance [61][62][63]. Aksoy and Carlsson [63] compared the fracture toughness of thermoset and thermoplastic films as interleaves in graphite/epoxy laminates under mode II loading.…”

Section: Film Interleavesmentioning

confidence: 99%

“…This large increase in mode II IFT was attributed to the fracture path deflecting when close to the nails, giving a high energy dissipation. Yao et al [62] compared the effect of using PEK-C as a matrix additive, a film interleaf and a particle interlayer. They found the film to be most effective at toughening the interlaminar regions of a carbon/ epoxy laminate made using prepregs, and attributed this to the presence of a 2-phase structure consisting of a PEK-C ''peel'' and rounded epoxy matrix regions wrapped by the PEK-C.…”

Section: Film Interleavesmentioning

confidence: 99%

See 1 more Smart Citation

Materials systems for interleave toughening in polymer composites

Vallack

Sampson

2022

J Mater Sci

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We review the literature describing the use of interleaves to increase interlaminar fracture toughness in fibre-reinforced polymer composites and hence to improve damage tolerance. From an analysis of data provided in the literature from the use of microfibre and nanofibre interleaves, we show that the performance of these widely researched systems is clearly differentiated when plotted against the mean coverage of the interleaf. Using a simple analysis, we suggest that this can be attributed to the influence of their porous architectures on the infusion of resin. We show also that the superior toughening performance of microfibre interleaves is only weakly influenced by the choice of fibre. We find also that the inclusion of carbon nanotubes within interleaves to deliver multifunctional composites can be optimised by using a hybrid system with microfibres. Graphical abstract

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Section: Film Interleavesmentioning

confidence: 99%

Section: Film Interleavesmentioning

confidence: 99%

Materials systems for interleave toughening in polymer composites

Vallack

Sampson

2022

J Mater Sci

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“…18 PES is a low-cost thermoplastic toughening material that has good chemical and physical compatibility with thermosetting resins. 19 In addition, Yao et al 20 found that the use of film interlayers was more effective and stable in interlaminar toughening than the use of matrix additives or particle interlayers. Therefore, the PES film interlayer is a good choice for interlaminar toughening of CFRPs.…”

Section: Introductionmentioning

confidence: 99%

Low‐cost carbon black‐loaded functional films for interlaminar toughening and in‐situ delamination monitoring of carbon fiber/epoxy composites

Liu

et al. 2022

J of Applied Polymer Sci

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Functional polyethersulfone (PES)/carbon black (CB) films were fabricated and interleaved into carbon fiber/epoxy composite laminates to simultaneously improve the mode I interlaminar fracture toughness (G IC ) and delamination monitoring sensitivity. It was found that when the CB content in the functional film was 7.5 wt%, the initial and propagation G IC of the laminate achieved the greatest improvements of 99.16% and 82.83%, respectively. The toughening mechanism was mainly attributed to the formation of phase separation structure, the plastic deformation of PES and the pull-out of epoxy and CBs. Meanwhile, a delamination increment-resistance change relationship equation was proposed to predict the delamination increment of the laminate during mode I delamination. Moreover, the effect of CB content in the film on the delamination monitoring sensitivity was investigated. The pure PES film showed the largest sensitivity coefficient k of 4.55, which was much higher than that of Control (0.14). When the CB content was in the range of 2.5-7.5 wt%, both G IC and k remained at relatively high levels, indicating that PES/CB films have promising applications in advanced multifunctional composites due to their low cost, simple manufacturing process, and largescale industrial manufacturability.

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“…Using thermoplastics as additives in thermoset-based CFRPs is an attractive method for enhancing their fracture toughness [11][12][13][14]. These additives can be in the form of particles [15][16][17][18], film [19,20], or fibers [21][22][23][24][25][26], and range in size from nano-to micrometers. These types of materials have long been used for toughening laminates, except for nanofibers which were introduced in the last few years [27] and have not attracted researchers' attention until recently [28].…”

Section: Introductionmentioning

confidence: 99%

The Thickness Effect of PSF Nanofibrous Mat on Fracture Toughness of Carbon/Epoxy Laminates

et al. 2021

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The geometrical features of nanofibers, such as nanomat thickness and the diameter of nanofibers, have a significant influence on the toughening behavior of composite laminates. In this study, carbon/epoxy laminates were interleaved with polysulfone (PSF) nanofibrous mats and the effect of the PSF nanomat thickness on the fracture toughness was considered for the first time. For this goal, the nanofibers were first produced by the electrospinning method. Then, double cantilever beam (DCB) specimens were manufactured, and mode-I fracture tests were conducted. The results showed that enhancing the mat thickness could increase the fracture toughness considerably (to about 87% with the maximum thickness). The toughening mechanism was also considered by presenting a schematic picture. Micrographs were taken using a scanning electron microscope (SEM).

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Toughening efficiency and mechanism of carbon fibre epoxy matrix composites by PEK-C

Cited by 28 publications

References 22 publications

Materials systems for interleave toughening in polymer composites

Materials systems for interleave toughening in polymer composites

Low‐cost carbon black‐loaded functional films for interlaminar toughening and in‐situ delamination monitoring of carbon fiber/epoxy composites

The Thickness Effect of PSF Nanofibrous Mat on Fracture Toughness of Carbon/Epoxy Laminates

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