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首页> 外文期刊>Journal of Reinforced Plastics and Composites >Comparison of in-plane resin transfer molding and vacuum-assisted resin transfer molding 'effective' permeabilities based on mold filling experiments and simulations
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Comparison of in-plane resin transfer molding and vacuum-assisted resin transfer molding 'effective' permeabilities based on mold filling experiments and simulations

机译：基于模具灌装实验和模拟的平面树脂转移模塑和真空辅助树脂转移模塑“有效”渗透的比较

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摘要

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.
机译：树脂传递模塑和真空辅助树脂转移成型是最常用的液体复合成型方法中的两个。对于树脂转移成型，模具填充模拟可以预测空隙和干斑的树脂流动图案和位置，这证明是设计用于复合部件的模具和喷射位置。为了模拟真空辅助树脂传递模塑，即使耦合模型在预测流动模式和厚度分布方面是成功的，除了渗透性表征之外还需要织物压实表征。此外，由于流量和织物压实的耦合性质，模拟是昂贵的昂贵，这耗尽了优化用于可靠生产的流动设计的可能性。在这项工作中，我们提出了一种替代方法来表征和使用树脂转移模塑求解器中的“有效”渗透率，以模拟真空辅助树脂转移成型中的树脂流动。这种去耦方法非常有效并提供合理的结果。模具填充时间之间的实验和模拟与E-玻璃CSM和碳5Hs的模拟之间的偏差分别为4.7％和1.0％，而使用“有效渗透值”的真空辅助树脂转移模塑盒分别为4.7％和1.0％ E-玻璃CSM和碳5HS织物分别为11.1％和12.3％，验证了所呈现的方法。

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