The Simulation Method for Injection Molding Process of Short-fiber/Thermoplastic Composites Considering Fiber Interactions

摘要

The theoretical fiber-interaction model including the fiber dynamics simulation for calculating the fiber orientation was proposed in our previous research. Then, the three-dimensional (3D) fiber orientation distribution was predicted by combining our developed fiber interaction model and improved Anisotropic Rotary Diffusion - Retarding Principle Rate (iARD-RPR) model. In this study, we proposed another theoretical model that has been introduced a fiber dynamics simulation in order to obtain a relation for fiber-matrix interaction coefficient C_M. This supposed that the coefficient is a exponential function of the fiber parameters, and strain rate. Simultaneously, the Micro-computed tomography system was employed to observe and measure the three-dimensional fiber orientation in short-glass fiber-reinforced polyamide 6 specimens, which were produced using plate-shaped cavity with the fiber contents ranging from 30 wt% to 65 wt%. The experimental and numerical results proved that this theory should be used for the 3D fiber orientation prediction with considering fountain flow.