长纤维增强聚合物注塑流动纤维取向分布数值模拟  

Numerical Simulation on the Fiber Orientation Distribution During Flow in Injection Molding of Long Fiber Reinforced Polymer

作　　者：江青松[1] 柳和生[1] 熊爱华[1] 何建涛[1] 李孟山[1] 

机构地区：[1]南昌大学聚合物成型加工研究室,江西南昌330031

出　　处：《高分子材料科学与工程》2015年第3期123-127,共5页Polymer Materials Science & Engineering

基　　金：江西省自然科学基金资助项目(20142BAB206030)

摘　　要：基于Hele-Shaw流动模型及广义牛顿流体本构方程,采用ARD-RSC取向模型,建立了长纤维增强聚合物注塑成型流动数学模型。以方形薄板为研究对象,运用Moldflow对注塑流动过程进行模拟,研究注射时间、熔体温度、模具温度和保压压力对纤维取向及分布的影响。结果表明,注射时间对纤维取向的影响最为显著,随着注射时间延长,纤维取向值增加;随着熔体温度或模具温度的升高,纤维取向值减小;保压压力对纤维取向的影响与速度/压力转换点有关。Based on the Hele-Shaw flow model and generalized Newtonian fluid constitutive equation,the flow mathematical model of injection molding of long fiber reinforced polymer was established coupled with the ARD-RSC orientation model.The part under study is a thin-walled square plate,and the effects of injection time,melt temperature,mold temperature and holding pressure on the fiber orientation distribution were investigated by Moldflow.The results show that injection time has the most dramatic effect on the fiber orientation.With the injection time increasing,the fiber orientation value increases.With increasing the temperature of melt or mold,the fiber orientation value decreases.The effect of the holding pressure on fiber orientation greatly depends on the velocity / pressure switchover point.

关 键 词：长纤维增强聚合物 注塑流动 纤维取向分布 数值模拟 

分 类 号：TQ327[化学工程—合成树脂塑料工业]