Fabrication, process simulation and testing of a thick CFRP component using the RTM process

Poodts, Ezequiel; Minak, Giangiacomo; Mazzocchetti, Laura; Giorgini, Loris

doi:10.1016/j.compositesb.2013.08.088

Cited by 70 publications

(50 citation statements)

References 22 publications

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“…In this process, layers of dried fibers are arranged inside and outside of the mold, in order to close it, the resin is injected at a certain pressure to wet the fibers. 4,8,9 To produce a high performance composite, good fiber impregnation is desirable in order to minimize effects such as high void contents and non-uniform fiber wetting. Intimate fiber/resin contact is vital to create strong adhesion in the interface.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and ballistic analysis of aramid/vinyl ester composites

Pagnoncelli

Piroli

Romanzini

et al. 2017

Journal of Composite Materials

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This study focused on evaluating mechanical and dynamic-mechanical properties of polyaramid/vinyl ester composites, as a function of the fiber content. Furthermore, split Hopkinson pressure bar technique and V 50 Ballistic limit tests were performed. Composites were prepared by resin transfer molding (RTM) with different fiber content, samples being identified as AD4, AD5 and AD6 (with 4, 5 and 6 polyaramid layers, respectively). Initially, fiber, void and matrix contents were calculated and statistically analyzed, in different regions of the composites. Mechanical and dynamical mechanical properties of the composites were improved by using higher fiber content. For example, impact strength of AD6 composite was 35% higher than AD4. Moreover, increase in the fiber content promoted an increase in tenacity and stress of the composites, in the same strain rate. Velocity limit in AD6 sample was estimated in ballistics tests and it was concluded that the composite obtained could accomplish the level I requisites of ballistic protection with V 50 of 304 m.s À1 .

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Section: Introductionmentioning

confidence: 99%

Mechanical and ballistic analysis of aramid/vinyl ester composites

Pagnoncelli

Piroli

Romanzini

et al. 2017

Journal of Composite Materials

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“…It is not conducive to the filling of the mold cavity by the resin during RTM process , and the filtering effect of the fiber layers leads to inhomogeneous distribution of the nanoparticles. 44 As stated earlier, many studies have focused on improving the fracture toughness of composite laminates based on interleaving method but relatively fewer studies have reported improvements in conductivity. Barjasteh et al 26 prepared composite laminates interleaved by a conductive polyamide 12 nonwoven fabric coated with graphene/graphite particles, the experimental results showed significant increase in mode II fracture toughness up to 141%, and the volumetric conductivity decreased from 100 MΩm to 402 Ωm in the through-thickness direction.…”

Section: Introductionmentioning

confidence: 99%

“…However, even small additions of nanoparticles in epoxy matrix can significantly increase the resin viscosity. It is not conducive to the filling of the mold cavity by the resin during RTM process , and the filtering effect of the fiber layers leads to inhomogeneous distribution of the nanoparticles …”

Section: Introductionmentioning

confidence: 99%

Simultaneous enhancement of electrical conductivity and interlaminar shear strength of CF/EP composites through MWCNTs doped thermoplastic polyurethane film interleaves

Xiang

et al. 2019

J of Applied Polymer Sci

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Carbon fiber‐reinforced epoxy (CF/EP) composites have been widely used in aerospace industry, while poor electrical conductivity and interlaminar shear fracture toughness could reduce their safety as structural components in use. In this work, we achieved simultaneous improvement in electrical conductivity and interlaminar shear strength through interleaved multi‐walled carbon nanotubes (MWCNTs) doped thermoplastic polyurethane (TPU) conductive thin films (CTFs), which were prepared by a solution casting method. The experimental results showed that the electrical conductivity of the laminates increased by about 13 and 16 times in the transverse and thickness directions with only about 1 wt % MWCNTs content in the laminates. The end‐notch flexure (ENF) tests showed that the mode II interlaminar fracture toughness (GIIC) of composites with 10 wt % MWCNTs CTF interleaf shows a significant increase of about 106%. The enhancement mechanism was further explored through microscopic morphological observation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47988.

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“…Evolved gases has been continuously transferred to an Agilent Cary 660 FT-IR optical bench through a transfer line kept at 280 °C to avoid any condensation of the substance present in the gases. FT-IR Spectra of the evolved gases have been acquired every 4 seconds, in the 3800-650 cm -1 range, with a spectral resolution of 4 cm -1 [20]. X-ray Fluorescence spectra have been acquired by means of a PANalytical AxiosMAX Advanced XRF Spectrometer, equipped with a rhodium X-ray tube target, set to a power of 2.4 kW in order to identify the possible presence of chlorine, fluorine or other elements.…”

Section: Methodsmentioning

confidence: 99%