Resin transfer molding process: a numerical and experimental investigation

Oliveira, Iran de; Amico, Sandro Campos; Souza, Jeferson Ávila; Lima, Antonio de

doi:10.1260/1750-9548.7.2.125

Cited by 15 publications

(6 citation statements)

References 10 publications

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“…Modeling of infiltration of liquids in porous media is a well‐studied subject, especially in the field of hydrology where it is used to model seepage of water through porous soils and rocks 29,30 . The physics of resin flow into a mold under pressure is similar to the seepage problem and so similar approaches have been used also to model the flow of resin into a mold containing fiber mats 23,31–38 . The models are used in these cases to determine the resin flow front and mold filling times corresponding to different infiltration conditions.…”

Section: Introductionmentioning

confidence: 99%

A polymer infiltration and pyrolysis (PIP) process model for ceramic matrix composites (CMCs)

et al. 2021

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This work describes a physics‐based model to simulate the polymer infiltration and pyrolysis (PIP) manufacturing process for ceramic matrix composites (CMCs). Models have been developed to characterize volumetric distribution of constituents and track porosity inside the composite at different PIP stages utilizing test data from TGA and DSC characterization of a commercial preceramic polymer. Laboratory experiments were done using C/SiC CMC specimens manufactured with a variable number of PIP cycles in order to obtain inputs for the models, and the analytical results have been shown to agree with porosity determined from physical measurements.

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Section: Introductionmentioning

confidence: 99%

A polymer infiltration and pyrolysis (PIP) process model for ceramic matrix composites (CMCs)

et al. 2021

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“…Process modeling and flow simulations of RTM and VARTM have been developed that predict the resin flow patterns, pressure distribution, and mold filling time that can assist in designing inlet and vents and optimize the process to produce parts without voids or dry-spots. For RTM, over the last three decades, several researchers have developed RTM process models and simulations, 2–7 based on constant material properties (no change in thickness, fiber volume fraction or permeability) during resin infusion and have validated them with RTM experiments. These simulations are very efficient and can predict mold filling for parts with many complex features and are being used by industry in their prototype development cycle.…”

Section: Introductionmentioning

confidence: 99%

Comparison of in-plane resin transfer molding and vacuum-assisted resin transfer molding ‘effective’ permeabilities based on mold filling experiments and simulations

Hancioglu

Sozer

Advani

2019

Journal of Reinforced Plastics and Composites

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Resin transfer molding and vacuum-assisted resin transfer molding are two of the most commonly used liquid composite molding processes. For resin transfer molding, mold filling simulations can predict the resin flow patterns and location of voids and dry spots which has proven useful in designing the mold and injection locations for composite parts. To simulate vacuum-assisted resin transfer molding, even though coupled models are successful in predicting flow patterns and thickness distribution, the input requires fabric compaction characterization in addition to permeability characterization. Moreover, due to the coupled nature of flow and fabric compaction, the simulation is computationally expensive precluding the possibility to optimize the flow design for reliable production. In this work, we present an alternative approach to characterize and use an “effective” permeability in the resin transfer molding solver to simulate resin flow in vacuum-assisted resin transfer molding. This decoupled method is very efficient and provides reasonable results. The deviations in mold filling times between experiments and simulations for the resin transfer molding process with E-glass CSM and carbon 5HS were 4.7% and 1.0%, respectively, while for the vacuum-assisted resin transfer molding case using “effective permeability value” with E-glass CSM and carbon 5HS fabrics were 11.1% and 12.3%, respectively, which validates the approach presented.

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“…The Resin Transfer Molding (RTM) process has been widely applied in several areas, such as: automotive, aerospace, sports and biomedical [10], as it has proved to be very effective in the processing of high performance composite materials [11]. In addition, it presents a low labor cost, simple tooling, a satisfactory cycle of time, easy process control, loss reduction, loss of styrene emission and allows the fabrication of complex structures with mechanical quality and good surface finishing [12,13].…”

Section: Introductionmentioning

confidence: 99%

Resin Flow in Porous-Fibrous Media: An Application to Polymer Composite Manufacturing

Santos

Delgado²,

Lima

et al. 2018

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This chapter aims to present a theoretical study of the fluid flow in porous media, with particular reference to manufacturing of polymer composites reinforced with fibers via resin transfer molding process. The mass and momentum conservation equations, including the effect of resin sorption by the fibers, and Darcy's law, are presented, and the analytical solution of the governing equation is obtained via method of separation of variables. Predicted results of the flow front, velocity, volumetric flow rate and pressure fields of the resin inside the model, during the injection process, are presented, and the effects of the injection pressure, resin viscosity and sorption term, are also analyzed.

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Resin transfer molding process: a numerical and experimental investigation

Cited by 15 publications

References 10 publications

A polymer infiltration and pyrolysis (PIP) process model for ceramic matrix composites (CMCs)

A polymer infiltration and pyrolysis (PIP) process model for ceramic matrix composites (CMCs)

Comparison of in-plane resin transfer molding and vacuum-assisted resin transfer molding ‘effective’ permeabilities based on mold filling experiments and simulations

Resin Flow in Porous-Fibrous Media: An Application to Polymer Composite Manufacturing

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