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

Vo, H.N.; Pucci, Monica Francesca; Drapier, Sylvain; Liotier, Pierre‐Jacques

doi:10.1016/j.colsurfa.2021.128120

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…In the present work, the fibers in a yarn are assumed to be arranged hexagonally (Caxial = 53) 46 ; and the diameter of a single fiber in YCN200 is 7 μ m from 36 The epoxy’s surface tension value of 32 mN/m is taken from 43 Dependence of Pc,L and Pc,T with both the wetting and non-wetting contact angle ϑ is shown in Figure 2. Based on the geometric analysis of Pc for the carbon fiber used in this work, for a minimum yarn porosity ∅ of 0.12 and contact angle 55° (in the range (55–82°) 54 ) it is seen that the normalized axial and transverse capillary pressure Pc,L and Pc,T ratio to the applied infusion pressure (Pin) 84 kPa are small number 0.048 and 0.0083, respectively. Moreover, since the primary focuses of the present work is on the macroscopic infusion, for simplicity, the influence of capillarity has been omitted in the current VI model.…”

Section: Model Formulationmentioning

confidence: 87%

Resin infusion in porous preform in the presence of HPM considering complex geometry and gravity: Flow simulation and experimental validation

Adhikari

Gururaja

Hemchandra

et al. 2022

Journal of Reinforced Plastics and Composites

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Present work demonstrates the complete numerical modeling and experimental validation of transient incompressible two-phase flow during vacuum infusion (VI) in the presence and absence of high permeability media (HPM) considering gravity effects. Coupled flow modeling based on continuity equations, Darcy’s law for porous media flow, including gravity effects with level set front tracking algorithm, has been developed on the multiblock-structured grid with higher-order finite-difference framework to predict the spatio-temporal preform saturation during infusion with/without HPM on the complex mold configurations. The model-predicted instantaneous change in pressure, thickness elevation, fill time, flow front positions, and influence of gravity have been validated with experiments for horizontal and vertical flat plates using pressure sensors and digital cameras. For the first time, the complete modeling and experimentation of transient VI in the presence or absence of HPM, including gravity, shows the ability to predict realistic preform saturation during VI in different mold geometry.

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Section: Model Formulationmentioning

confidence: 87%

Resin infusion in porous preform in the presence of HPM considering complex geometry and gravity: Flow simulation and experimental validation

Adhikari

Gururaja

Hemchandra

et al. 2022

Journal of Reinforced Plastics and Composites

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“…The micro-void ratio has a major effect on the mechanical behavior of composites that could outmatch the potential benefits to fiber and yarn mechanical performance [25]. This is why modifying the surface properties of fibers at the scale of yarns and fabrics is of first interest in the manufacturing of performant composites [26,27]. Teraube et al [28] recently carried out a study that demonstrates that surface modifications of flax fibers can reduce their polarity.…”

Section: Introductionmentioning

confidence: 99%

Tannins as Biobased Molecules for Surface Treatments of Flax Wrapped Rovings for Epoxy/Flax Fabrics Biocomposites: Influence on Mechanical Properties through a Multi-Scale Approach

Tilouche-Guerdelli,

Lacoste,

Perrin

et al. 2024

J. Compos. Sci.

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The present study examined the effect of biobased molecules grafted onto wrapped flax rovings on the mechanical properties of fabrics designed for epoxy-based biocomposites, aiming to optimize fiber/matrix adhesion. Biobased solutions, such as tannins from quebracho, were used to treat wrapped flax rovings in comparison to a non-biobased aminosilane solution used as a reference. The chemical treatment is performed using an innovative lab-scale impregnation line. The influence of the solution concentration has been investigated. SEM-EDX and FT-IR confirmed the grafting efficiency of molecules on wrapped rovings. Plain and 5-harness satin fabrics were then manufactured at lab scale with the resulting functionalized rovings. Tensile tests were carried out on rovings and on fabrics. A concentration of 1% silane is sufficient to improve the mechanical properties of rovings and fabrics. The addition of NaOH to tannins strengthens flax fiber rovings more than tannins alone, and the weave pattern influences mechanical performance.

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“…The manufacturing of composites with a hybrid process is an effort to obtain better mechanical strength [43]. Some factors affect the mechanical aspects of [11,[44][45][46][47][48][49]. Woven fiber composites can be varied in several ways, such as variations in the arrangement, the number of layers, and the orientation of the fibers.…”

Section: Introductionmentioning

confidence: 99%

The Interconnection of Carbon Active Addition on Mechanical Properties of Hybrid Agel/Glass Fiber-Reinforced Green Composite

et al. 2023

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Nowadays, the hybridization of natural and glass fiber has promised several advantages as a green composite. Nevertheless, their different characteristics lead to poor mechanical bonding. In this work, agel fiber and glass fiber was used as reinforcements, and activated carbon filler was added to the polymer matrix of a hybrid composite to modify its characteristics and mechanical properties. A tensile and bending test was conducted to evaluate the effect of three different weight percentages of activated carbon filler (1, 2, and 4 wt%). Vacuum-assisted resin infusion was used to manufacture the hybrid composite to obtain the high-quality composite. The results have revealed that adding 1 wt% filler yielded the most optimum result with the highest tensile strength, flexural strength, and elastic modulus, respectively: 112.90 MPa, 85.26 MPa, and 1.80 GPa. A higher weight percentage of activated carbon filler on the composite reduced its mechanical properties. The lowest test value was shown by the composite with 4 wt%. The micrograph observations have proven that the 4 wt% composite formed agglomeration filler that can induce stress concentration and reduce its mechanical performance. Adding 1 wt% filler offered the best dispersion in the matrix, which can enhance better load transfer capability.

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

Cited by 6 publications

References 43 publications

Resin infusion in porous preform in the presence of HPM considering complex geometry and gravity: Flow simulation and experimental validation

Resin infusion in porous preform in the presence of HPM considering complex geometry and gravity: Flow simulation and experimental validation

Tannins as Biobased Molecules for Surface Treatments of Flax Wrapped Rovings for Epoxy/Flax Fabrics Biocomposites: Influence on Mechanical Properties through a Multi-Scale Approach

The Interconnection of Carbon Active Addition on Mechanical Properties of Hybrid Agel/Glass Fiber-Reinforced Green Composite

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