Analysis of the resin transfer molding (RTM) process for FRP and its process simulation fundamentals

Caba, Stefan; Koch, Michael

doi:10.1063/1.4918428

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…By applying a vacuum the impregnation of the fiber material and the degassing of the matrix material are supported. This process allows the reproducibly manufacturing of high-quality components with high fiber volume percentage and low void content [5].…”

Section: Previewmentioning

confidence: 99%

Production of 3D Parts from Wood Chips in a Closed Mold Process

Hartmann

Koch

2015

MSF

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The application-oriented distribution of wood chips is a major obstacle in the production of 3D molded composite parts made of plastics and wood. Similar to fibers in conventional fiber-reinforced plastic components long chips can be used for force transmission. Short chips and wood powder can be distributed homogeneously between longer chips to increase the wood volume percentage and to allow post-processing-free edge areas. The applied process parameters during the incorporation of the matrix material determine the filling of the cavity and the impregnation of the chips. Different formaldehyde-free resin and adhesive systems, as well as thermoplastic powders are used as matrix material. By controlling the subsequent pressing process of the oriented and impregnated chips the density and wall thickness of the molded part can be influenced. In this work different production process variants and a concept for a modular 3D experimental mold are investigated. The flowability and bulk density of the wood chip fractions are characterized and the compression pressure required in the production process is determined. Initial tests with a panel mold are carried out and the bending strength of the manufactured specimen is examined.

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Section: Previewmentioning

confidence: 99%

Production of 3D Parts from Wood Chips in a Closed Mold Process

Hartmann

Koch

2015

MSF

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“…As the complexity of geometries and the stress values increases, the manual involvement decreases noticeably, replaced by complex, sophisticated robotic techniques that account for delivering less defective, highly consistent, and enhanced manufacturing rates. Nevertheless, the concepts of these processes have been kept unmodified, and there are existing troubles in minimizing the production costs of these techniques [22][23][24]. These structures are usually subjected to fluctuating stresses that deteriorates the material, leading to its degradation because of fibre/matrix de-bonding, matrix cracking, and fibre fracturing [25].…”

Section: Introductionmentioning

confidence: 99%

Influence of Stress Level and Fibre Volume Fraction on Fatigue Performance of Glass Fibre-Reinforced Polyester Composites

Zaghloul

2022

Polymers

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Fibre-reinforced polymeric composite materials are becoming substantial and convenient materials in the repair and replacement of traditional metallic materials due to their high stiffness. The composites undergo different types of fatigue loads during their service life. The drive to enhance the design methodologies and predictive models of fibre-reinforced polymeric composite materials subjected to fatigue stresses is reliant on more precise and reliable techniques for assessing their fatigue life. The influences of fibre volume fraction and stress level on the fatigue performance of glass fibre-reinforced polyester (GFRP) composite materials have been studied in the tension–tension fatigue scenario. The fibre volume fractions for this investigation were set to: 20%, 35%, and 50%. The tensile testing of specimens was performed using a universal testing machine and the Young’s modulus was validated with four different prediction models. In order to identify the modes of failure as well as the fatigue life of composites, polyester-based GFRP specimens were evaluated at five stress levels which were 75%, 65%, 50%, 40%, and 25% of the maximum tensile stress until either a fracture occurred or five million fatigue cycles was reached. The experimental results showed that glass fibre-reinforced polyester samples had a pure tension failure at high applied stress levels, while at low stress levels the failure mode was governed by stress levels. Finally, the experimental results of GFRP composite samples with different volume fractions were utilized for model validation and comparison, which showed that the proposed framework yields acceptable correlations of predicted fatigue lives in tension–tension fatigue regimes with experimental ones.

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Optimizing the Manufacturing Processes of Carbon Fiber Epoxy Resin Composite Panels

Hamdan

Lafi

Hassan

2017

Journal of Manufacturing Science and Engineering

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Carbon fiber-reinforced plastics (CFRPs) are sustainable materials compared to others due to their distinctive properties and light weight. On the other hand, producing CFRP products with minimum manufacturing costs and high quality can be quite challenging. This research aims to formulate a mathematical model that determines the optimum manufacturing process/processing parameters and takes into consideration the effect of the selected processes on the quality of panels and the environmental impact surface roughness and percentage of voids are used as metrics to assess the desired quality level of the finished product. Energy consumption is used to quantify the environmental cost. Design of experiment (DOE) was performed to study the effect of varying the process parameters, namely application method, pressure, and temperature on the response variables. Regression models were used to model the response variables. A generalized model was developed and validated both numerically and experimentally. Results signify the need for a systematic approach to determine optimum manufacturing processes without resorting to trial and error.

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Analysis of the resin transfer molding (RTM) process for FRP and its process simulation fundamentals

Cited by 3 publications

References 3 publications

Production of 3D Parts from Wood Chips in a Closed Mold Process

Production of 3D Parts from Wood Chips in a Closed Mold Process

Influence of Stress Level and Fibre Volume Fraction on Fatigue Performance of Glass Fibre-Reinforced Polyester Composites

Optimizing the Manufacturing Processes of Carbon Fiber Epoxy Resin Composite Panels

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