Effect of wettability on viscous fluid impregnation in single-layer woven-fibre bundles driven by pressure difference

Yoshihara, Kota; Kamei, Yo; Mizuno, Atsuki; Ohgaki, Haruka; Hori, Takuma; Ueno, Ichiro

doi:10.1016/j.compositesa.2020.106049

Cited by 8 publications

(6 citation statements)

References 61 publications

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“…From the figure, there are two areas that can be distinguished, the rich matrix areas (between the fiber tows) and the CF/epoxy area. That demonstrates the ability of the VARTM process to the resin impregnation in woven-fibre bundles to fabricate high-quality CFRE composite [19].…”

Section: Resultsmentioning

confidence: 78%

Structural Health Monitoring of the Carbon Fiber Reinforced Epoxy/MWCNTS Composites under Vibration Loading, Using Electrical Resistance Change Method

Hammadi

Rady

Abbas

et al. 2022

MSF

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This work aims to investigate the structural deterioration of the Carbon Fiber Reinforced Epoxy (CFRE) composite under vibration loading by monitoring the variation of the electrical resistance of the composite. The vacuum assisted resin transfer moulding process is used to fabricate the CFRE composites. Multiwall Carbon Nanotubes (MWCNTs) (0.5% wt) are added to the non-conductive resin to increase its electrical conductivity before CFRE fabrication. The tests were carried out by monitoring the variation in electrical resistance of the CFRE composite at 90 Hz frequency vibration loading. The dispersion of MWCNTs into the matrix and the damage of CFRE composite are illustrated by the SEM images. The results show that the electrical resistance change can be considered as a good indication to detect damage in CFRE (modified with 0.5 wt % MWCNTs) under vibration loading.

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Section: Resultsmentioning

confidence: 78%

Structural Health Monitoring of the Carbon Fiber Reinforced Epoxy/MWCNTS Composites under Vibration Loading, Using Electrical Resistance Change Method

Hammadi

Rady

Abbas

et al. 2022

MSF

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“…This increased resolution, however, comes at the cost of the overall field of view, making the method better suited for local detection of voids rather than for the assessment of saturation. Yoshihara et al (Yoshihara et al, 2020) investigated the role of capillary pressure, varied by the application of different fluorine coatings on the fiber surface, on the dual-scale flow behavior in an optical microscopy setup. This allowed them to observe infusion of a woven fabric on a micron-scale, shown in Figure 3C, which were coupled to numerical simulations.…”

Section: Transparent Fiber Reinforced Polymersmentioning

confidence: 99%

“…Further control of surface properties could be achieved by the application of numerous chemical treatments (Mittal et al, 2018). As an example, Yoshihara et al (Yoshihara et al, 2020) controlled the capillary pressure by the application of fluorine coatings on glass fiber textiles, which enhanced the capillary effects acting during resin infiltration.…”

Section: Role Of the Fiber Surface Treatmentmentioning

confidence: 99%

“…Similarly, finite element solvers are coupled with level-set for tracking the free surface and enriched for accounting for multiscale effects at the air-liquid-solid interface (Liu et al, 2016;Chevalier et al, 2018;Andriamananjara et al, 2019;Rougier et al, 2021) with capability of modeling wetting and non-wetting systems as well as the transition or to predict the average capillary pressure evolution in between individual fibers (Yeager et al, 2016). In recent years, there has also been interest towards the use of other numerical approaches to account for the dual scale effects using particle based solvers (Yashiro et al, 2019;Yoshihara et al, 2020) or boundary elements (Patiño and Nieto-Londoño, 2021). Recent developments in application of above mentioned in modeling the dual-scale flow with a focus on the introduction of sink effects has been reviewed by Patiño-Arcila and Vanegas-Jaramillo (Patiño-Arcila and Vanegas-Jaramillo, 2018).…”

Section: Unsaturated Flow Modelsmentioning

confidence: 99%

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Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Review

et al. 2022

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Capillarity plays a crucial role in many natural and engineered systems, ranging from nutrient delivery in plants to functional textiles for wear comfort or thermal heat pipes for heat dissipation. Unlike nano- or microfluidic systems with well-defined pore network geometries and well-understood capillary flow, fiber textiles or preforms used in composite structures exhibit highly anisotropic pore networks that span from micron scale pores between fibers to millimeter scale pores between fiber yarns that are woven or stitched into a textile preform. Owing to the nature of the composite manufacturing processes, capillary action taking place in the complex network is usually coupled with hydrodynamics as well as the (chemo) rheology of the polymer matrices; these phenomena are known to play a crucial role in producing high quality composites. Despite its importance, the role of capillary effects in composite processing largely remained overlooked. Their magnitude is indeed rather low as compared to hydrodynamic effects, and it is difficult to characterize them due to a lack of adequate monitoring techniques to capture the time and spatial scale on which the capillary effects take place. There is a renewed interest in this topic, due to a combination of increasing demand for high performance composites and recent advances in experimental techniques as well as numerical modeling methods. The present review covers the developments in the identification, measurement and exploitation of capillary effects in composite manufacturing. A special focus is placed on Liquid Composite Molding processes, where a dry stack is impregnated with a low viscosity thermoset resin mainly via in-plane flow, thus exacerbating the capillary effects within the anisotropic pore network of the reinforcements. Experimental techniques to investigate the capillary effects and their evolution from post-mortem analyses to in-situ/rapid techniques compatible with both translucent and non-translucent reinforcements are reviewed. Approaches to control and enhance the capillary effects for improving composite quality are then introduced. This is complemented by a survey of numerical techniques to incorporate capillary effects in process simulation, material characterization and by the remaining challenges in the study of capillary effects in composite manufacturing.

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“…During the impregnation of resin in the fibre network, there is a competition between viscous and capillary effects that are related to the dimensionless capillary number Ca [13][14][15][16][17]. Different type of defects at different localisation can occur during manufacturing depending on the Ca.…”

Section: Equivalence Law For Capillary Pressure (P Cap )mentioning

confidence: 99%

Capillary pressure contribution in fabrics as a function of fibre volume fraction for Liquid Composite Moulding processes

Pucci

Drapier

et al. 2022

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Effect of wettability on viscous fluid impregnation in single-layer woven-fibre bundles driven by pressure difference

Cited by 8 publications

References 61 publications

Structural Health Monitoring of the Carbon Fiber Reinforced Epoxy/MWCNTS Composites under Vibration Loading, Using Electrical Resistance Change Method

Structural Health Monitoring of the Carbon Fiber Reinforced Epoxy/MWCNTS Composites under Vibration Loading, Using Electrical Resistance Change Method

Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Review

Capillary pressure contribution in fabrics as a function of fibre volume fraction for Liquid Composite Moulding processes

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