Numerical Simulation of Pressure Variation and Resin Flow in Injection Pultrusion

Rahatekar, Sameer S.; Roux, J. A.

doi:10.1177/0021998303037012005

Cited by 33 publications

(38 citation statements)

References 6 publications

(12 reference statements)

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“…There are various geometric and processing parameters affecting the wetout process. The research contained in [1] through [14] has studied various aspects of the pultrusion manufacturing process and has recommended ways to improve pultrusion; however none have [1][2][3][4][5][6][7][8][9][10][11][12][13][14] considered fiber compaction due to the resin injection pressure. Some of the research has investigated fiber compaction behavior due to static compressive forces which helped in building up the basis for the present study.…”

mentioning

confidence: 99%

Effect of Resin Viscosity in Fiber Reinforcement Compaction in Resin Injection Pultrusion Process

Shakya¹,

Roux²,

Jeswani³

2013

Appl Compos Mater

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In resin injection pultrusion, the liquid resin is injected through the injection slots into the fiber reinforcement; the liquid resin penetrates through the fibers as well as pushes the fibers towards the centerplane causing fiber compaction. The compacted fibers are more difficult to penetrate, thus higher resin injection pressure becomes necessary to achieve complete reinforcement wetout. Lower injection pressures below a certain range (depending upon the fiber volume fraction and resin viscosity) cannot effectively penetrate through the fiber bed and thus cannot achieve complete wetout. Also, if the degree of compaction is very high the fibers might become essentially impenetrable. The more viscous the resin is, the harder it is to penetrate through the fibers and vice versa. The effect of resin viscosity on complete wetout achievement with reference to fiber-reinforcement compaction is presented in this study.

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confidence: 99%

Effect of Resin Viscosity in Fiber Reinforcement Compaction in Resin Injection Pultrusion Process

Shakya¹,

Roux²,

Jeswani³

2013

Appl Compos Mater

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“…For example, Dong [18] increased the thickness of the distribution medium and/or the fiber preform to obtain equivalent material permeability. Besides, the Kozeny-Carman equation was commonly utilized to discuss the flow impregnates inside the porous material when considering the dimension of fiber [19][20][21][22]. Gebart [19] investigated the permeability of an idealized unidirectional reinforcement through the Darcy's law and Kozeny-Carman equation, and Rahatekar [21] used the permeability models through Kozeny-Carman equation to discuss the relationship between injection pultrusion pressure and process control parameters.…”

Section: Introductionmentioning

confidence: 99%

A Prediction Method for In-Plane Permeability and Manufacturing Applications in the VARTM Process

Lee¹,

Jhan²,

Chung³

et al. 2011

ENG

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VARTM (Vacuum Assisted Resin Transfer Molding) is a popular method for manufacturing large-scaled, single-sided mold composite structures, such as wind turbine blades and yachts. Simulation to find the proper infusion scenario before manufacturing is essential to avoid dry spots as well as incomplete saturation and various fiber weaves with different permeability affect numerical simulation tremendously. This study focused on deriving the in-plane permeability prediction method for FRP (Fiber Reinforced Plastics) laminates in the VARTM process by experimental measurements and numerical analysis. The method provided an efficient way to determine the permeability of laminates without conducting lots of experiments in the future. In-plane permeability imported into the software, RTM-Worx, to simulate resin flowing pattern before the infusion experiments of a 3D ship hull with two different infusion scenarios. The close agreement between experiments and simulations proved the correctness and applicability of the prediction method for the in-plane permeability.

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“…Rahatekar and Roux [8] developed a 2D finite volume method to predict the resin pressure field, resin velocity field, and resin flow front location. A model for flow simulation and resin curing was developed by Kommu et al [9] employing the FE/CV and finite difference techniques; results were presented at very low pull speeds.…”

Section: Introductionmentioning

confidence: 99%

Multiple Injection Ports and Part Thickness Impact on Wetout of High Pull Speed Resin Injection Pultrusion

Jeswani

Roux

Vaughan

2009

Journal of Composite Materials

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Manufacturing of composite materials using resin injection pultrusion is presently a cost-effective method of producing composites; however, there is still a potential for significant improvements in the productivity of this approach for high-speed production. Complete wetout of the dry fiber reinforcement by the liquid resin at high pull speeds is essential for improving the throughput of the pultrusion process. Complete fiber reinforcement wetout depends strongly on axial placement of the injection ports/slots and the geometry of the injection chamber (taper of the walls of injection chamber and final part thickness). Geometric parameters modeled in this study were multiple injection ports and their axial location within the injection chamber and thickness of the final pultruded part; investigations of these geometric parameters are original contributions of the work. In this study, the finite volume numerical technique was employed to model the flow of polyester resin through the glass fiber reinforcement. Results depict the impact of varying the thickness of the pultruded part and the use of multiple injection ports on the minimum injection pressure necessary to achieve complete fiber matrix wetout and on the resin pressure at the injection chamber exit for the slot injection and for the discrete port injection configurations. This model is a useful guide for improving the efficiency and productivity of the resin injection pultrusion process for an attached injection chamber configuration with tapered walls.

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Numerical Simulation of Pressure Variation and Resin Flow in Injection Pultrusion

Cited by 33 publications

References 6 publications

Effect of Resin Viscosity in Fiber Reinforcement Compaction in Resin Injection Pultrusion Process

Effect of Resin Viscosity in Fiber Reinforcement Compaction in Resin Injection Pultrusion Process

A Prediction Method for In-Plane Permeability and Manufacturing Applications in the VARTM Process

Multiple Injection Ports and Part Thickness Impact on Wetout of High Pull Speed Resin Injection Pultrusion

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