复合材料RTM制造工艺计算机模拟分析研究

研究以计算机模拟分析技术的实际工程应用为目的,在普通 WINDOW窗口下实现各类平面构件RTM工艺过程的控制体积单元 /有限元算法 ( CV/FEM),进行工艺过程的压力场及树脂流场模拟分析。模拟分析主要工艺参数——树脂粘度、注射压力及预成型体渗透特性对 RTM工艺过程的影响规律。研究得出注射压力及渗透率与工艺充模时间的定量反比关系,以及树脂粘度与充模时间的的定量线性关系。研究还揭示了注口设计对充模时间的影响规律。实验验证表明工艺模拟分析结果与实验结果有较好的一致性。 RTM工艺过程的计算机模拟分析技术将为优化工艺设计、减低工艺实验成本及保证产品质量提供有效的技术手段

SIMULATION ANALYSIS OF RTM PROCESS FOR COMPOSITE MATERIALS

The simulation technique of RTM process has been developed which is based on control volume/finite element method (CV/FEM). The resin flow front and pressure profile of RTM process for the flat structure products are presented. The quantitative inverse ratio correlation both for injection pressure and permeability with filling time is revealed under constant injection pressure condition. The quantitative linear relationship between resin viscosity and filling time is also analyzed. The influences of injection gate design are discussed in the research. The simulation results of filling time are in good agreement with those of the experiments. The simulation technique developed is featured by its easy use and affordable application for general composite industries.