Evaluation of Local Flow under Injection Molding of FRP Based on Moving Particle Semi-implicit Particle Simulation Method

Flowability of resin and fibers during forming process of short fiber-reinforced plastics was evaluated by Moving Particle Semi-implicit (MPS) particle-simulation. For injection molding of short fiber-reinforced plastics, there are several design parameters. It is inefficient in terms of time and cost to optimize the parameters based on experimental procedures. In this study, a numerical prediction using MPS particle-simulation was applied. In particular, a new analysis method of local flow accompanied by change of time and analysis area was developed to solve discrepancies of the distribution of velocity between global injection area and local flow area. As the numerical results, resin flow and fiber orientation in injection molding had same tendency with global injection molding analysis and the proposed MPS analysis. Therefore, it is concluded that the proposed method contributed to evaluate resin flow and fibers in injection molding process of short fiber-reinforced plastics.