Reactive mold filling in resin transfer molding processes with edge effects

Ding, Yanyu; Jia, Yuxi; Yang, Junying; Sun, Sheng; Shi, Tongfei; An, Lijia

doi:10.1002/app.30345

Cited by 10 publications

(8 citation statements)

References 34 publications

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“…The piecewise linear interface construction (PLIC‐VOF) method is used to track the flow front. The other detailed description of the rein flow governing equations had been reported in Ref [9, 10, 27]. Integrated with the recursive approach and the branching theory, the flow chart of the numerical simulation is shown in Fig.…”

Section: Setup Of Numerical Simulationmentioning

confidence: 99%

Correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior in RTM processes

et al. 2011

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At the reactive mould‐filling stage in resin transfer moulding (RTM) processes, the correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior plays a key role in the optimum control of RTM processes. A new methodology used to simulate the reactive resin flow in RTM processes with edge effect is presented in this article. The recursive approach and the branching theory are used to describe the evolution of molecular structure and resin viscosity, respectively. And then the resin flow process is simulated by means of a semi‐implicit iterative calculation method and the finite volume method. The results reveal the proposed resin cure‐structure‐viscosity model provides excellent agreement with the experimental viscosity data during the RTM filling process. It is also observed that the curing reaction causes the inhomogeneous distribution of resin conversion and resin molecular weight in the mould cavity, which will result in the spatially structural and performance inhomogeneities in the finished products. With the injection temperature or the edge width increasing, the discrepancy of resin conversion and resin molecular weight in the mould cavity is more evident. This study is helpful for understanding the complicated relationship among the processing variables, resin structures, and properties. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

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Section: Setup Of Numerical Simulationmentioning

confidence: 99%

Correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior in RTM processes

et al. 2011

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“…However, as being investigated in our previous work (Refs. and , even if the resin temperature reached up to 423 K, the maximum of resin curing degree is just around 0.1 during the resin infiltration process. Consequently, by comparing the effect of the above two aspects on resin viscosity, the higher the injection temperature is, the less the resin viscosity is.…”

Section: Simulation Results and Discussionmentioning

confidence: 96%

“…The boundary conditions involving the resin flow governing equations can be consulted in Refs. . Then the boundary conditions related to the sensitivity equations are illustrated as follows: inlet:

\frac{\partial q}{\partial p} = \frac{\partial q_{i n l e t}}{\partial p}

for constant injection velocity conditions; mold wall:

true{\begin{array}{l} S_{v} (i, M_{1}) = 0 & C (i, j) = 1 \\ S_{v} (i, M_{1}) = S_{v} (i, M_{2}) & C (i, j) < 1 \end{array},

where

(i, {normalM}_{1})

and

(i, {normalM}_{2})

are the last node and the penultimate node along the y ‐direction, respectively. outlet: all the parameter sensitivity

S_{f}

are supposed to be fully developed in the normal direction to the outlet section, then

\frac{\partial S_{f}}{\partial n} = 0

. …”

Section: Boundary Conditionsmentioning

confidence: 99%

Sensitivity analysis on resin transfer molding processes with edge effect and curing reaction characteristics

Ding

Jia

2014

Polym. Compos.

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The mold filling time and resin flow front shape are of fundamental importance during resin transfer molding (RTM) processes, because the former influences productivity and the latter affects composites quality. In this article, considering both edge effect and curing reaction characteristics of the resin flow process, the sensitivity analysis method is introduced to investigate the sensitive degree of mold filling time and resin flow front shape to the key material and processing parameters. The function employed to describe the resin flow front shape is defined, and the mathematical relationships of the key physical parameters, such as fluid pressure sensitivity, flow velocity sensitivity, mold filling time sensitivity, and resin flow front shape sensitivity, are established simultaneously. In addition, then the resin infiltration process is simulated by means of a semi‐implicit iterative calculation method and the finite volume method. The simulated results are in agreement with the analytical ones. The results show that under constant injection velocity conditions, both the change in the resin temperature and the alteration of the inlet velocity hardly affect the resin flow front shape, whereas the influence of edge permeability on the resin flow front shape is the greatest. This study is helpful for designing and optimizing RTM processes. POLYM. COMPOS., 36:2008–2016, 2015. © 2014 Society of Plastics Engineer

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“…The detailed description of rein flow governing equations has been reported in Refs. [9][10][11] , as listed in Table 1.…”

Section: Modelingmentioning

confidence: 99%

Non-Isothermal Simulation of Resin Transfer Molding Process with Edge Effect

Ding

Jia

Dong

et al. 2014

Polymers and Polymer Composites

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The resin infiltration stage during the resin transfer molding process is complicated, which involves the edge effect, resin curing reaction and heat transfer phenomenon. In this paper, considering the edge effect, the integrated investigation on curing reaction, physical property, two-dimensional resin flow and three-dimensional temperature distribution is implemented in theory and numerical simulation. And then the evolution of coupling physical fields, such as resin temperature, curing degree and resin viscosity, is analyzed numerically. The present study is helpful for understanding the complex relationships among a variety of parameters during the reactive filling process.

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Reactive mold filling in resin transfer molding processes with edge effects

Cited by 10 publications

References 34 publications

Correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior in RTM processes

Correlation analysis of epoxy/amine resin cure, structure and chemorheological behavior in RTM processes

Sensitivity analysis on resin transfer molding processes with edge effect and curing reaction characteristics

Non-Isothermal Simulation of Resin Transfer Molding Process with Edge Effect

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