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首页> 外文会议>International SAMPE symposium and exhibition >The effect of ply drop-off regions on flow propagation and processing parameters during the resin transfer molding process
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The effect of ply drop-off regions on flow propagation and processing parameters during the resin transfer molding process

机译：在树脂传递模塑过程中，层落区对流动传播和加工参数的影响

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摘要

Historically, the Resin Transfer Molding (RTM) injection process has relied on trial and error, where the resin is injected into a fiber filled mold, difficulties and problems in impregnation are discovered, adjustments are made and the process is iterated. The science-based manufacturing can reduce the guesswork and allow for greater reliability in part outcome. One feature of a desired part is a tapered section, or one with a changing cross section. During the fabric lay-up these sections must be filled by ply drop-offs, where one layer of fabric overlays another. This feature can cause certain concerns during the filling stage. The resin will run down the ply drop-offs, and cause disturbances to a "natural" flow front propagation. This study will first explore the potential benefits of a converging and diverging flow. Also, once perimeter racetracking is introduced, the ply drops create a transverse racetracking channel, which can drastically alter the resin flow pattern. This study will also examine the effect of different fabric stacking methods on the flow front pattern. Idealized upper and lower bound models will be introduced, and then the more practical middle bound models will be examined and their performance evaluated.
机译：从历史上看，树脂传递模塑（RTM）的注射过程依赖于反复试验，将树脂注射到填充纤维的模具中，发现了浸渍的困难和问题，进行了调整并重复了该过程。基于科学的制造可以减少猜测，并提高零件结果的可靠性。所需零件的一个特征是锥形截面，或者具有变化的截面。在织物叠置期间，这些部分必须由帘布层下垂物填充，其中一层织物要覆盖另一层。在填充阶段，此功能可能会引起某些问题。树脂将顺着帘布层滴落下来，并对“自然”流动前沿传播造成干扰。这项研究将首先探讨汇聚和分散流的潜在好处。同样，一旦引入了周边跑道，层状液滴就会产生横向跑道，这可以极大地改变树脂的流动方式。这项研究还将研究不同的织物堆叠方法对流动前沿图案的影响。将介绍理想的上限和下限模型，然后将检查更实用的中界模型并评估其性能。

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