Resin flow modeling in compliant porous media: an efficient approach for liquid composite molding
Resin flow modeling in compliant porous media: an efficient approach for liquid composite molding
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DOI：
10.1007/s12289-017-1360-9
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发表时间：
2018-07
影响因子：
2.4
通讯作者：
P. Šimáček;S. Advani
中科院分区：
文献类型：
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作者：
P. Šimáček;S. Advani
在诸如树脂传递模塑（RTM）和真空辅助树脂传递模塑（VARTM）的液体复合材料模塑（LCM）工艺中，在注射步骤期间用树脂完全饱和增强是必要的。在RTM中，增强物在灌注期间不经历变形，但是对于其他方法，增强物厚度在注射期间改变。为了模拟柔性介质中的树脂流动，常规地使用RTM流动模拟软件。如果使用适当的“有效”渗透率，它在预测流型方面是成功的。正确的方法需要新的实现，耦合的变形和压力场，这是计算上更苛刻。我们的工作描述了一种计算效率高的方法来添加到RTM模拟环境中的校正，以考虑变形。这种方法是验证与已知的解决方案和实验验证。模拟应用到一个复杂的几何形状，表现出更好的计算性能，并确认，“有效”渗透率可以用来模拟复杂的几何形状的流动。
In Liquid Composite Molding (LCM) processes such as Resin Transfer Molding (RTM) and Vacuum Assisted Resin Transfer Molding (VARTM), complete saturation of reinforcement with resin during the injection step is necessary. In RTM, reinforcement experiences no deformation during infusion but for other methods reinforcement thickness changes during the injection. To model resin flow in compliant media, RTM flow simulation software is routinely used. It has been successful in predicting flow patterns if appropriate “effective” permeability is used. The proper approach requires new implementation that couples the deformation and pressure field which is computationally more demanding. Our work describes a computationally efficient methodology to add corrections into RTM simulation environment to account for deformation. This approach is verified with known solutions and experimental validation. The simulation is applied to a complex geometry which demonstrates better computational performance and confirms that the “effective” permeability may be used to model flow in complex geometries.