基于FEPG有限元分析系统的树脂充模过程模拟

Simulation of resin molding process based on FEPG finite element analysis system

为优化复杂预成型体结构的液体成型工艺,基于有限元法/生死节点法模拟了复合材料液体模塑成型过程树脂流动,并针对典型矩形平板、圆板结构、I型加筋壁板充模过程进行了仿真与验证。结果表明:典型矩形平板和圆板结构的充模过程模拟结果与理论解一致性较好,验证了生死节点法跟踪树脂流动前锋的有效性。含有方腔的变厚度圆柱体和正方体三维实体结构的充模过程模拟验证了有限元方法对三维结构的适用性。基于有限元法/生死节点法的液体充模过程模拟方法对于复杂求解区域具有更好适应性,可用于复杂实体结构的液体模塑成型工艺过程树脂流动规律预测、指导模具设计及工艺优化。

In order to optimize the liquid forming process of the complex perform structure, the resin flow during composite liquid molding process was simulated base on the finite element method/life and death node method. The molding process of the typical rectangle plate, circle plate structure and I rib reinforced panel was simulated and verified. The results show that the simulation results of molding process for typical rectangle plate and circle plate structure are in good agreement with the theoretical solutions, which verify the validation of the life and death node method in the resin flow front tracking. The molding process simulation of the non-uniform thickness cylinder with cavity and the cube three-dimensional entity structure verify the applicability of finite element method for the three-dimensional structure. The simulation method of liquid molding process base on the finite element method/life and death node method is more adaptive to the complex solution region, which can he used to predict the resin flow law of liquid molding process for the complex entity structure, guide the design and process optimization of the mould.