注射流动纤维取向的耦合模型

Fiber orientation coupling simulation model in injection molding

短纤维复合材料注射充模是一个复杂的流体流动过程,其多尺度结构的形成及演化是多层次-多尺度耦合问题。将塑料熔体中分布的纤维粒子处理成介观纤维硬棒粒子,以宏观连续介质模型为基础,采用拉格朗日-欧拉法建立了耦合有介观纤维柱状粒子的流动控制方程。使用有限元/有限差分/控制体积法对其进行了求解,模拟结果与实际基本符合。

Short fiber composites injection molding is one of very complicated fluid flowing process,the forming and evolvement of its multi-scale structure is a problem coupling multi-layer and multi-scales.Through studying its injection molding process,fiber particle was developed by using model of rigid rod.Based on the macroscopic continual equation,double-scale models of main and front fluid were established by Lagrange-Euler methods,which coupled both macro-scale and meso-scale.The results agree with the rule of fiber orientation induced by the flow.