Numerical and experimental investigation of Joule heating in a carbon fibre powder epoxy towpregging line

Çelik, Murat; Maguire, James; Noble, Thomas A.; Robert, Colin; Brádaigh, Conchúr M. Ó

doi:10.1016/j.compositesa.2022.107285

Cited by 7 publications

(9 citation statements)

References 49 publications

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“…They investigated options to overcome these challenges, such as melting, during forming or application of a water-based gel, however, they were either impracticable, economically inefficient, or resulted in insufficient part quality. 17 Recent research is re-addressing the development and processing of carbon fiber (CF) yarns impregnated with SR. [19][20][21] Maguire et al 5,6,22,23 investigated an alternative approach, where the SR is molten to one or both sides of a textile layer (woven or non-crimp fabrics). For this a SR with relatively low melt viscosity (about 1 PaÁs was used).…”

Section: State-of-the-artmentioning

confidence: 99%

“…They investigated options to overcome these challenges, such as melting, during forming or application of a water‐based gel, however, they were either impracticable, economically inefficient, or resulted in insufficient part quality 17 . Recent research is re‐addressing the development and processing of carbon fiber (CF) yarns impregnated with SR 19–21 …”

Section: Introductionmentioning

confidence: 99%

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Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Janzen,

May

2023

Polymer Composites

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Solid resins (SR) are fully reactive resin systems that are solid at room temperature. Up to a critical temperature they can be quasi‐infinitely molten and solidified without any relevant curing reaction. This study deals with novel SR‐based prepregs where a dry textile is covered with a regular SR (uncured) pattern, allowing for storage and draping at room temperature. The manufacturing of SR prepregs with accurate pattern geometries and the processing of the same into laminates with a pore volume content <1% using a vacuum bag only process is demonstrated for four pattern types and two curing cycles. The study furthermore shows that the pattern design has an influence on the mandatory drying phases as well as on fiber undulations. With sufficiently long drying phases, equivalent pore volume contents and interlaminar shear strength could be obtained with different pattern types.Highlights Manufacturing of carbon fiber (CF) solid epoxy prepregs with patterned resin distribution Epoxy powder processing Out‐of‐Autoclave manufacturing with vacuum‐bag‐only prepregs Interlaminar shear strength of carbon fiber reinforced plastics (CFRP) made of woven CFs Analysis of pore volume content and fiber undulation

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Section: State-of-the-artmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Janzen,

May

2023

Polymer Composites

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“…Upama et al [29] investigated joule heating for electrodes of nanotube and inorganic matrices with composite electrodes. Celik et al [30] discussed joule heating numerically and experimental investigations are also done for carbon fibre powder epoxy. Joule heating reduces the power coast and produces more efficient heat for carbon fiber to change it to powder epoxy.…”

Section: Introductionmentioning

confidence: 99%

“…Celik et al. [30] discussed joule heating numerically and experimental investigations are also done for carbon fibre powder epoxy. Joule heating reduces the power coast and produces more efficient heat for carbon fiber to change it to powder epoxy.…”

Section: Introductionmentioning

confidence: 99%

Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Junaid,

Aslam,

Zhang

2024

Z Angew Math Mech

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In this study, we investigate the electromagnetohydrodynamic (EMHD) Eyring–Powell hybrid Nanofluid flowing through a stretching surface, with the effects of copper , aluminum oxide nanoparticles and gyrotactic motile microorganism with polyvinyl alcohol‐water as a base fluid. Heat transfer, joule heating, solar radiation, mass transmission, and entropy generation effects are analyzed on the fluid flow. A numerical model with an analytical methodology for the description of fluid flow and thermal properties of a parabolic trough solar collector (PTSC) installed on a solar plate is underway as the use of solar plates in many devices going to expand. The governing partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) by using similarity transformations. The higher‐order ODEs are then solved using the analytical scheme known as the homotopy analysis method (HAM) in MATHEMATICA. The effects of different parameters such as magnetic field, electric field, Prandtl number, Eckert number, bioconvection diffusion, Lewis number, chemical reaction parameter, bioconvection, and Grashof number are analyzed with flow characteristics graphically. The velocity of the fluid shows a decrement due to the radiation parameter, Grashof number, and Solutal Grashof number. Thermodynamic properties of the fluid are enhanced with the Prandtl number, Eckert number, and electric and magnetic field. The entropy of the fluid increases with the Prandtl number, Eckert number, and diffusion parameter. Bejan number rises due to diffusion and bioconvection diffusion parameters. The study is about the mathematical analysis of Eyring Powell fluid flowing through a PTSC with the addition of a motile microorganism. PTSC are a main source of energy production for many sectors. Nanoparticles of copper and aluminum oxide are mixed to raise the thermal properties of the fluid used for electricity production engines, solar energy systems, cooling devices. Solar radiation effect, Joule heating, and viscous dissipation are analyzed for the energy production devices.

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“…In contrast, for powder towpregging and powder semi-pregging, the powder acts as the primary polymer matrix for the composite. For towpregging, the powder is typically dispersed between spread reinforcing fibres in an automated production process using electrostatic deposition or similar [20,21]. This is particularly attractive for thermoplastic powders due to their high viscosity, i.e., the dispersion between the fibres reduces the distance that molten polymer must flow to achieve full impregnation.…”

Section: Introductionmentioning

confidence: 99%

Hygroscopicity in Epoxy Powder Composites

Maguire,

Wang,

Ó Brádaigh

2024

Powders

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Epoxy powders offer a low-cost way of manufacturing thick-section composite parts, such as those found in wind and tidal turbines. Currently, their processing cycle includes a lengthy drying stage (≥15 h) to remove ambient moisture. This drying stage prevents void defect formation and, thereby, a reduction in mechanical properties; however, it constitutes up to 60% of the processing time. Little research has been published which studies the drying stage or its optimisation. In the present work, experimental and simulated analyses are used to investigate the effects of hygroscopicity in epoxy powder composites. Tests are performed to quantify the void content of dried and undried laminates and to measure its impact on transverse flexural strength. Dynamic vapour sorption analysis is used to study the sorption behaviour of the epoxy powder. It is shown that the epoxy powder is slightly hygroscopic (1.36 wt%) and exhibits sorption behaviour that is characteristic of glassy polymers. This results in up to 4.8% voids (by volume) if processed in an undried state, leading to a 43% reduction in transverse flexural strength. A modified linear driving force model is fitted to the desorption data and then implemented in existing process-simulation tools. The drying of a thick epoxy powder composite section is simulated to investigate the influence of powder sintering on the duration of the drying stage. Process simulations reveal that a standard drying cycle prematurely sinters the powder, which inhibits moisture release. By maintaining the powder state, simulations show that the drying cycle can be reduced to 5 h.

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Numerical and experimental investigation of Joule heating in a carbon fibre powder epoxy towpregging line

Cited by 7 publications

References 49 publications

Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Applications of solar thermal radiation in a bio‐convective Eyring–Powell hybrid nanofluid flow under the influence of electro‐magnetohydrodynamics near a stagnation point: An irreversibility study

Hygroscopicity in Epoxy Powder Composites

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