Hybrid Prepreg Tapes for Composite Manufacturing: A Case Study

Venkataraman, Mohanapriya; Militký, Jiřı́; Samkova, Alzbeta; Karthik, Daniel; Dana, Kausik; Petrů, Michal

doi:10.3390/ma15020619

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…The advantages of using carbon multifilament tapes with a rectangular cross-section over threads (rovings) with a circular cross-section (see Figure 1) include the following: (a) constant thickness and width, (b) reduced thickness compared to rovings, (c) evenly distributed tensile stress. 27 Assuming that the tape consists of carbon fibers of circular cross section of diameter d, two packing arrangements can be considered; open packing and hexagonal close packing. 28 Close packing is one of the basic forms of packing models in which the filaments fit into a hexagonal pattern as illustrated in Figure 1 and its maximum value is 0.785.…”

Section: Geometrical Structure Of Multifilament Tapesmentioning

confidence: 99%

Porous, low thickness carbon-fiber reinforced epoxy composites with excellent flexibility and superior electromagnetic radiation protection

Tunáková

Tunák

Novotná

2023

Journal of Industrial Textiles

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Fiber reinforced polymers, especially carbon fiber reinforced polymers, are expected in the future to contribute more than 50% of the structural mass of an aircraft. With increasing application and experience increased attention is paid to carbon-fiber reinforced composites with improved advanced properties, such as mechanical, structural and electrical, allowing them to displace the more conventional materials, such as metal alloys. In this paper, we used the Design of experiment methodology to investigate the design and properties of newly developed unique porous carbon-fiber reinforced composites intended for electromagnetic shielding purposes. The main goal was therefore to fabricate a composite with low thickness, high permeability to air and water vapor with a satisfactory ability to shield electromagnetic fields, whereas the investigation of the influential variables of the reinforcement and the investigation of the influence of the matrix on the overall shielding efficiency of the composite belongs to the sub-objectives. Furthermore, other important properties of the composites including heat and mass transfer, mechanical and electrical properties were evaluated. A quality index evaluation approach using weighted and normalized data was implemented to choose a composite with properties, which best fits to its intended use. The highest quality index was achieved by the composite containing reinforcement with warp and weft sett 18 dm−1 using carbon tape 2 mm wide. This composite provides electromagnetic shielding 36 dB at 1.5 GHz, having high air permeability 1000 mm/s, relatively low bending rigidity of around 2.5 Nmm and thickness of only 0.37 mm.

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Section: Geometrical Structure Of Multifilament Tapesmentioning

confidence: 99%

Porous, low thickness carbon-fiber reinforced epoxy composites with excellent flexibility and superior electromagnetic radiation protection

Tunáková

Tunák

Novotná

2023

Journal of Industrial Textiles

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“…Consecutive from the left: stabilized glass composite tape, cross-section micrograph of the hybrid tape, and robotized precise winding using hybrid tapes [3,4].…”

Section: Figurementioning

confidence: 99%

“…The first impulse came with the development of pre-impregnated glass tapes (hybrid tapes) for the production of one-piece composite wind turbine blade using the method of precise winding [3,4], see figure 1.…”

Section: Introductionmentioning

confidence: 99%

Modification of Glass/Epoxy laminates using micro/nano particles from carbon wastes

Tomková

Pechočiaková

Novotná

2022

J. Phys.: Conf. Ser.

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This study is focused on the influence of a modified matrix on glass fiber reinforced laminates, which inherently have different material properties than carbon fiber composites. For this study we modified the green epoxy resin with 2.5wt% of carbon based fillers (synthesized graphene nanopellets, and milled recycled carbon fibres), which were subsequently applied to the glass multifilaments, and vacuum cured to obtain fiber/epoxy UD laminates. The prepared samples were further tested on the mechanical, thermo-mechanical and electrical properties, to evaluate the filler influence on the studied type of glass/epoxy laminates. Aim of this work is to study the influence of carbon fillers on overall composite properties, and evaluate its applicability for the improvement of UD glass epoxy laminates without having to significantly change the weight of component and the technology of the composite production.

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Side Illumination Behavior and Mechanical Properties of Twisted End‐Emitting Polymer Optical Fiber Bundles

Zhang,

Yang,

Kremenakova

et al. 2024

Macro Materials & Eng

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Polymer optical fibers (POFs), including side‐emitting POF (SEPOF) and end‐emitting POF (EEPOF) are developed for luminous textiles. The SEPOF is more common for usage but suffers from significant intensity decay, which limits its effective usage length. In contrast, the EEPOF can provide a much more stable side illumination behavior than SEPOF since the light is largely confined within the EEPOF, while its side illumination requires special treatment. In this work, 0.5 mm diameter EEPOFs were firstly assembled into bundles with 10 EEPOFs (B10) and 15 EEPOFs (B15), and then twisted. The morphology, tensile properties, and side illumination behavior of the twisted EEPOF bundles are evaluated. With an increased twisting degree, the initial modulus of twisted sample B10 increases (due to shortening of bundle diameter) from 1.06 to 1.17 GPa while the initial modulus of twisted sample B15 decreases from 1.01 to 0.91 GPa. The increased twisting degree also results in the higher flexibility (indirectly connected with modulus) of the twisted EEPOF bundles. Besides, the increased twisting degree results in a higher side illumination intensity meantime causes a decreased side illumination intensity along the light penetration path. When the twisting degree is low (e.g., 10 T m−1), the highest decrease rate of side illumination intensity along the light penetration path is found.

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Hybrid Prepreg Tapes for Composite Manufacturing: A Case Study

Cited by 5 publications

References 27 publications

Porous, low thickness carbon-fiber reinforced epoxy composites with excellent flexibility and superior electromagnetic radiation protection

Porous, low thickness carbon-fiber reinforced epoxy composites with excellent flexibility and superior electromagnetic radiation protection

Modification of Glass/Epoxy laminates using micro/nano particles from carbon wastes

Side Illumination Behavior and Mechanical Properties of Twisted End‐Emitting Polymer Optical Fiber Bundles

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