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Simulating VARTM for better infusion

机译：模拟VARTM以获得更好的输液

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摘要

A resin flow simulation tool is helping to optimize liquid molding of aerospace parts. The progression of resin through a mold during infusion is a complex and often inscrutable phenomenon. Seat-of-the-pants mold design based on past experience might work for simple part geometries, but as shape complexity increases it becomes more difficult to position mold vents and gates for the best results. Getting it wrong can mean incomplete wetout of the reinforcements, nonuniform cure, poor resin/fiber bond and residual stresses. "There is a real need for analytical tools to supplement experience in manufacturing design," says Dr. Jeffrey M. Lawrence of V System Composites Inc. (VSC, Chester, Pa. and Anaheim, Calif.), previously a staff member at the University of Delaware's Center for Composite Materials (UD-CCM). UD-CCM's Drs. Suresh Advani and Pavel Simacek have, for the past 12 years, developed the Liquid Injection Molding Simulation (LIMS) tool, which enables the user to digitally model and predict a resin's in-mold flow behavior in resin transfer molding (RTM) and vacuum-assisted resin transfer molding (VARTM) processes. The LIMS software, to which Lawrence contributed while at the University, has become a key tool in VSC's efforts to optimize tool, part and manufacturing process designs.
机译：树脂流动模拟工具正在帮助优化航空航天零件的液体成型。输注过程中树脂通过霉菌的扩散是一个复杂且通常难以理解的现象。根据过去的经验，坐垫模具设计可能适用于简单的零件几何形状，但是随着形状复杂性的增加，为获得最佳效果而放置模具的排气孔和浇口变得越来越困难。弄错了可能意味着增强材料不完全浸湿，固化不均匀，树脂/纤维粘结不良和残余应力。 V System Composites Inc.（VSC，宾夕法尼亚州切斯特市和加利福尼亚州阿纳海姆市）的前工作人员，杰弗里·劳伦斯（Jeffrey M. Lawrence）博士说：“确实需要分析工具来补充制造设计方面的经验。”特拉华大学复合材料中心（UD-CCM）。 UD-CCM的博士Suresh Advani和Pavel Simacek在过去的12年中开发了液体注射成型仿真（LIMS）工具，使用户能够在树脂传递模塑（RTM）和真空中对树脂的模内流动行为进行数字化建模和预测。辅助树脂传递模塑（VARTM）工艺。劳伦斯在大学期间为其提供的LIMS软件已成为VSC优化工具，零件和制造过程设计的主要工具。

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