发射箱箱盖树脂传递模塑工艺有限元模拟分析

Finite Element Simulation of Launcher Container Cover Molding by RTM Process

目的为了减少人力和物力资源的浪费,节约产品成本,通过有限元分析技术确定箱盖树脂传递模塑工艺(RTM)的工艺参数。方法对箱盖RTM工艺树脂流动过程进行数值模拟,对比箱盖结构在线注射-点出射和点注射-点出射工艺下,当注模压力为0.2,0.4 MPa时对应的树脂流动前锋位置和压力分布结果。结果综合成本和效率两方面因素,选择0.4 MPa作为RTM的注模压力。采用线注射-点出射工艺得到稳定的树脂流动前锋形状,能够有效预防干斑的产生。结论分析结果与实验具有较好的吻合性,能够有效指导RTM工艺中模具的设计,可降低"试错法"带来的高昂成本和低效率,对提高复合材料构件的制造水平具有明显积极作用。

The work aims to determine the RTM parameters of the launcher container cover through the finite element analysis technology, so as to reduce the waste of man power ＆ material resources and product costs. The numerical simu- lation of resin flow process of cover RTM was carried out. The resin flow forward position and pressure distribution re- sults of online injection - point outgoing and point injection - point outgoing were compared accordingly when the injec- tion molding pressure was 0.2 MPa or 0.4 MPa. In order to balance the cost and efficiency, 0.4 MPa was selected as the RTM injection molding pressure. Online injection - point outgoing process was used to get stable resin flow forward shape, which could effectively prevent the generation of dry patches. As analysis results are well anastomotic with the experi- ments, they can effectively.guide the mold design in the RTM process, reduce the high cost and low efficiency of ＂trial and error method＂, and play an obviously positive role in improving the manufacturing level of composite components.