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近几年在树脂膜渗透成型工艺(RFI)的基础上开发出了一种新型的航空复合材料制造工艺:液体树脂灌注成型工艺(LRI,Liquid Resin Infusion)。由于LRI是在一个真空膜下进行的,它不需要特殊的模具,所以大大降低了制造成本,并且用这种工艺可以制出大而厚的复杂部件,但是这也使得我们很难了解到整个工艺过程中内部参数的变化情况。为了指导实际的制造工艺,优化制造方案和参数,并减少制造缺陷,开发和运用有效的数值计算模型就变的非常的必要。最近Celle等人利用有限元方法(FEM)开发出了一种有关LRI的基础数值模型[4,5],本文将要介绍在这种基础模型上开发出的对LRI的数值建模计算方法和它的应用,并与实验结果进行对比和讨论。结果表明:本文所做的数值建模计算结果与实验结果有着较好的一致性,能较为有效地对LRI成型工艺进行模拟计算。
In recent years, based on the resin membrane infiltration process (RFI), a new type of aviation composite manufacturing process has been developed: Liquid Resin Infusion (LRI). Since the LRI is carried out under a vacuum film, it does not require special molds, so the manufacturing costs are greatly reduced and large and thick complex parts can be made with this process, but this also makes it difficult to understand the entire Process changes in the internal parameters. In order to guide the actual manufacturing process, optimize manufacturing options and parameters, and reduce manufacturing defects, it is necessary to develop and apply effective numerical calculation models. Recently, Celle et al. Developed a basic numerical model for LRI by using the finite element method (FEM) [4,5]. This article will introduce the numerical modeling and calculation method for LRI developed on this basic model The application and comparison with the experimental results and discussion. The results show that the numerical simulation results obtained in this paper are in good agreement with the experimental ones, and the LRI molding process can be simulated more effectively.