Simulation of the reinforcement compaction and resin flow during the complete resin infusion process

Govignon, Quentin; Bickerton, Simon; Kelly, Piaras

doi:10.1016/j.compositesa.2009.07.007

Cited by 115 publications

(130 citation statements)

References 43 publications

(52 reference statements)

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“…Therefore the preform compaction stress increases and the reinforcement is subjected to wet compaction. Note that during these three phases (dry compaction, wet unloading and wet compaction) the permeability, porosity and thickness of the preform dynamically change with the varying preform deformation because of compaction pressure variation [3]. Thickness variation during filling and post-filling process is a manifestation of the coupled fabric compaction and resin flow.…”

Section: Variation Of Part Thickness During Infusion Processmentioning

confidence: 99%

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Compaction Behavior and Part Thickness Variation in Vacuum Infusion Molding Process

et al. 2011

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In vacuum infusion molding process (VIMP), it is difficult to manufacture a composite part with small dimensional tolerance, since the upper mold for the process is flexible. In this study, the static and cyclic compaction responses of five kinds of fabrics were experimentally studied under real VIMP conditions, with the effects of compaction pressure, compaction time, compaction cycle and number of the fabric layers. The static and cyclic compaction responses of the all fabrics follow different power law models and the resulting fiber volume fraction and relaxation factor increase with the number of layers. Although the resulting fiber volume fraction increases with the layer numbers, change of the fiber volume fraction of the composite parts with 10 layers to 100 layers of the all fabrics is less than 2.5%. The thickness of the composite part was monitored and measured using micrometer gauges, and the effects of processing parameters on the final thickness of part was investigated. The part thickness varies as a function of spatial coordinates and time during pre-filling, filling and post-filling stages in VIMP. The variation and the final value of the part thickness would be significantly affected by the processing parameters. Statistical results show that the final part thickness is equivalent to the thickness of the dry preform under the 0.08 MPa vacuum compaction pressure in VIMP. The difference between the fiber volume fraction of the final part and that of the dry preform is 2%~5.7%.

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Section: Variation Of Part Thickness During Infusion Processmentioning

confidence: 99%

“…VIMP is widely used to manufacture large scale composite structures, such as wind turbine blades, pressure vessels, panels for boats, etc. The VIMP can be divided into four process stages [3,4]:lay-up, prefilling, filling and post-filling. In the lay-up stage, fabric preform is laid on the solid side of the mold.…”

Section: Introductionmentioning

confidence: 99%

Compaction Behavior and Part Thickness Variation in Vacuum Infusion Molding Process

et al. 2011

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“…The numerical simulation technology is a feasible solution [3,4]. After simulating the mold filling process, the rationality of the ply scheme and the pouring system can be judged, then the process parameters can be optimized [5].…”

Section: Introductionmentioning

confidence: 99%

Simulation Optimization of the Filling Process of Vacuum Infusion Molding Process for Composite Yacht Hull

Yang¹,

Jin²,

Wang³

2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract. Vacuum infusion molding process(VIMP) is widely used for manufacturing the composite yacht hull, but the process parameters are designed by experience or lots of experiments. In this paper, the filling process of VIMP for composite yacht hull was deeply analyzed based on numerical simulation technology. Firstly, we simulated the filling process of yacht hull under different ply schemes, evaluated the manufacturability of the ply scheme based on the simulation results. Secondly, we determined the best runner layout pattern by simulating the filling process under four different runner layout patterns. Lastly, we studied the optimization method for gate locating of VIMP, established the mathematical model for optimizing the gate location and obtained the concrete form of the object function after a series of simulations, then obtained the optimal gate location result. The simulations also showed that it is inadvisable to reduce the filling time just by adding the gate quantity.

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“…In addition, due to the use of the flexible vacuum bag and, consequently, due to the variation of compaction pressure, the part thickness and local permeability of the fibre preform change during resin injection as function of time and space [25]. Therefore, to achieve a desired thickness in the final part, one should model the coupled fabric compaction and resin flow [26][27][28]. The most common technique to measure the permeability is to induce an unidirectional flow trough the reinforcement and monitor both the matrix front and the pressure as function of time [29].…”

Section: Introductionmentioning

confidence: 99%

Permeability characterization of stitched carbon fiber preforms by fiber optic sensors

Antonucci¹,

Esposito²,

Ricciardi³

et al. 2011

Express Polym. Lett.

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Abstract. The in-plane and through thickness permeability of unidirectional stitched carbon fiber preforms have been determined through vacuum infusion tests. The impregnation of various dry preforms with different stitching characteristics has been monitored by fiber optic sensors that have been stitched together with the dry tow to manufacture the dry preform. The experimental infusion times have been fitted by a numerical procedure based on Finite Element (FE) processing simulations. A good agreement between the numerical and experimental infusion times has been found demonstrating the potentiality of the fiber sensor system as suitable tool to evaluate impregnation times and permeability characteristics.

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Simulation of the reinforcement compaction and resin flow during the complete resin infusion process

Cited by 115 publications

References 43 publications

Compaction Behavior and Part Thickness Variation in Vacuum Infusion Molding Process

Compaction Behavior and Part Thickness Variation in Vacuum Infusion Molding Process

Simulation Optimization of the Filling Process of Vacuum Infusion Molding Process for Composite Yacht Hull

Permeability characterization of stitched carbon fiber preforms by fiber optic sensors

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