Viscosity: thermal history treatment in resin transfer moulding process modelling

Fontana, Quentin P. V.

doi:10.1016/s1359-835x(97)00048-1

Cited by 24 publications

(10 citation statements)

References 6 publications

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“…Experiments at different temperatures must be conducted, compared and analyzed to calculate the parameters. A wide range of temperatures is needed [7] to obtain representative results.…”

Section: Resin Viscosity Modelsmentioning

confidence: 99%

Modeling the viscosity development of epoxy resins during injection of the RTM process

Caba¹,

Koch²

2016

AIP Conference Proceedings

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Effects of aspect ratio and concentration on rheology of epoxyAbstract. The development of, in particular RTM, processes for fiber reinforced composite parts is driven by cost reduction that can be achieved by shorter cycle times. The main sub processes are the injection and the curing time of the resin. Both depend directly on resin properties. During the injection phase the viscosity of the resin is a main factor for the flow rate. Additionally, the wetting of fibers and within that the void formation is influenced. The cure of the resin is the most time intensive sub process. In this paper a new model for the description of the resin viscosity development during the injection phase using the cumulative Weibull distribution function is presented. A study of the isothermal viscosity development of numerous resins has been conducted in a wide temperature range ascertaining the applicability. New possibilities for advanced resin selection and a more accurate modeling of the void formation during an injection phase of the RTM process are shown to confirm the benefit of this model.

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“…Experiments at different temperatures must be conducted, compared and analyzed to calculate the parameters. A wide range of temperatures is needed [7] to obtain representative results.…”

Section: Resin Viscosity Modelsmentioning

confidence: 99%

Modeling the viscosity development of epoxy resins during injection of the RTM process

Caba¹,

Koch²

2016

AIP Conference Proceedings

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“…A correction as a function of temperature is proposed by extrapolating that obtained for the Young modulus [27,28] or for the viscosity [29]. The temperature sensitivity can be written in an exponential form, the so called Arrhenius law [9,10]:…”

Section: Temperature Sensitivitymentioning

confidence: 99%

Ultrasonic broadband characterization of a viscous liquid: Methods and perturbation factors

2015

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“…It is also affected by the temperature at the time of injection, active shelf life, the reaction kinetics (which in turn depends upon the catalyst/accelerator ratio). It is assumed that the resin injection is completed during the incubation period of the curing reaction and, as a result, the temperature and viscosity are not significantly affected during the injection period [10]. It is also possible to assign the quality values based on the viscosity of the resin over which some consistency in quality is expected in the shop-floor.…”

Section: Resin Viscosity ()mentioning

confidence: 99%

Quality Evaluation of Resin Transfer Molded Products

Babu

Prabhakaran

Agrawal

2008

Journal of Reinforced Plastics and Composites

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The present study introduces a new procedure to evaluate the quality of composite products using the graph theoretic approach, and a composite screw rotors process is considered (manufactured by the Resin Transfer Molding (RTM)). The composite product coming from the manufacturing processes must have good surface finish and high quality without any defects. There are several factors which affect the quality during design and manufacture of the RTM products like screw rotors. These factors form a quality digraph based on the interactions existing between them. Hence, we considered the quality digraph by defining fuzzy crisp scores for the degree of interactions between the factors. A quality index derived from quality permanent function is helpful for quality inspectors on the shop floor to decide whether the product is within benchmark limits. The benchmark limits obtained for the composite product, manufactured by the RTM process by considering the strong and weak interactions existing between the factors defined for quality, are considered as upper and lower bounds in deriving the indices. Therefore the present work proposes a quality index, which is a useful numerical index for quality assurance groups to take proper decisions on the shop floor for the manufacturing process adapted to composites (composite molders).

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Viscosity: thermal history treatment in resin transfer moulding process modelling

Cited by 24 publications

References 6 publications

Modeling the viscosity development of epoxy resins during injection of the RTM process

Modeling the viscosity development of epoxy resins during injection of the RTM process

Ultrasonic broadband characterization of a viscous liquid: Methods and perturbation factors

Quality Evaluation of Resin Transfer Molded Products

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