Modeling of resin flow in natural fiber reinforcement for liquid composite molding processes

Nguyen, Van Hau; DELEGLISE-LAGARDERE, M.; Park, Chung

doi:10.1016/j.compscitech.2015.03.016

Cited by 24 publications

(16 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is a value that relates the speed that a fluid front is able to pass through a permeable media to other processing variables. 15 Darcy's law relates the flow rate to the pressure gradient through permeability tensor [22][23][24]…”

Section: Permeabilitymentioning

confidence: 99%

“…It is a value that relates the speed that a fluid front is able to pass through a permeable media to other processing variables. 15 Darcy’s law relates the flow rate to the pressure gradient through permeability tensor 22–24 where V D is the Darcy’s velocity vector, P is the pressure, μ is the viscosity, and K is the symmetric permeability tensor. 25 When the continuity equation, ∇· V D = 0, is combined with the Darcy’s law and the boundary conditions are applied, it will result in an equation relating the fluid front position, Φ, to the permeability of the material as well as other test conditions by the following equation where Φ is a function of only the dimensionless fluid front, ρ f = r f /r o , where r f is the fluid front radius and r o is the inlet gate radius, and τ is the permeability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of different variables on in-plane radial permeability of natural fiber mats

Ehresmann

Amiri

Ulven

2016

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

There has been a vast growth in manufacturing of fiber reinforced plastics by means of liquid composite molding such as resin transfer molding and vacuum-assisted resin transfer molding processes. In these processes, compression of the porous media and pressure of the injected resin result in in-mold forces that need to be determined. Limited information exists regarding the processing parameters and extent of reinforcing potential natural fibers have in polymer matrices. Current study investigates the effect of different variables such as fiber volume fraction, shive content, fiber size, wax content, and resin viscosity on permeability of five different natural fiber mats. Flax fiber with low-, medium-, and high-shive content as well as hemp and kenaf fiber mats was selected for this study and an original experimental device was setup to measure the permeability of the mentioned fiber mats based on different variables. It was found that increasing fiber volume fraction will result in reduction of permeability of all mats. The presence of shive and larger fiber size increased the permeability. Higher wax content lowered the permeability. These competing factors could be used by manufacturers to produce a mat which had optimum permeability while still maintaining acceptable strength.

show abstract

Section: Permeabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of different variables on in-plane radial permeability of natural fiber mats

Ehresmann

Amiri

Ulven

2016

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…Once again, it was shown that fibre swelling controls the non-Darcy type response of such fabrics. Accordingly, Park and co-workers have proposed a new resin flow model including the volumetric changes of resin and of fibre [227] as well as the permeability change due to the fibre swelling [267] which compares well with experiments. Following the developments in fabric forming prior to resin impregnation for petro-based composites [271,272], permeabilities in sheared flax fabrics have received very little attention, but these may be of primary importance [273].…”

Section: Impregnation In Bio-based Compositesmentioning

confidence: 98%

“…Conversely, long fibres coming from crops like flax fibres, behave very differently regarding their particular fibre architecture and nature as described previously. Therefore, additional effects must be accounted for during the resin (liquid) impregnation of the flax fibre network [226,227].…”

Section: Impregnation In Bio-based Compositesmentioning

confidence: 99%

Specific features of flax fibres used to manufacture composite materials

et al. 2018

View full text Add to dashboard Cite

The use of composite materials reinforced by flax fibres has been increasing steadily over the last 20 years. These fibres show attractive mechanical properties but also some particularities (naturally limited length, presence of a lumen, fibres grouped in bundles in the plant, complex surface properties and composition). An analysis of the available literature indicates that the quality of the composite materials studied is not always optimal (high porosity, incomplete impregnation, heterogeneous microstructure, variable fibre orientation). This paper reviews published data on the specific nature of flax fibres with respect to manufacturing of biocomposites (defined here as polymers reinforced by natural fibres). All the important steps in the process which influence final properties are analyzed, including the plant development, retting, fibre extraction, fibre treatment, preform preparation, available manufacturing processes, the impregnation step, fibre cell wall changes during processing and fibre/matrix adhesion.

show abstract

“…Although in the literature, RTM process is recognized as an exclusive technique used for structural composites obtention, the application of this process for natural fiber composites production, since the parameters has been suitable adjusted, enables to produce natural fiber composites plates with better mechanical properties and higher fiber volume contents, regarding to useful process, as hand lay‐up .…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber chemical treatment of nonwoven coconut fiber/epoxy composites adhesion obtained by RTM process

et al. 2015

View full text Add to dashboard Cite

In this work untreated and alkali treated nonwoven coconut fiber mats/epoxy resin composites were manufactured using the resin transfer molding process. The alkaline solution removes some impurities present on fibers superficial layers and the effect regarding fiber/matrix adhesion were investigated by thermogravimetric analysis, dynamic mechanical analysis (DMA), scanning electron microscopy (SEM), ultrasonic C‐scan, and quasi‐static flexural test. Results show a removing of some amorphous fibers constituents, mainly waxes, extractives, and hemicellulose, revealing the fiber roughness surface but no initial degradation temperature changing. Regarding the composites, a similar interfacial adhesion was observed in both one through the results of SEM, DMA and quasi‐static flexural tests. The conclusion is that chemical treatment conditions applied on the fiber surface was been suitable to improve fiber roughness but did not the adhesion between coconut fibers mat and epoxy resin. POLYM. COMPOS., 38:2518–2527, 2017. © 2015 Society of Plastics Engineers

show abstract

Modeling of resin flow in natural fiber reinforcement for liquid composite molding processes

Cited by 24 publications

References 16 publications

The effect of different variables on in-plane radial permeability of natural fiber mats

The effect of different variables on in-plane radial permeability of natural fiber mats

Specific features of flax fibres used to manufacture composite materials

Effect of fiber chemical treatment of nonwoven coconut fiber/epoxy composites adhesion obtained by RTM process

Contact Info

Product

Resources

About