复合材料注射成型纤维取向数值模拟分析
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摘要
基于Hele-Shaw理论及广义非牛顿流体本构方程,采用RSC取向模型,建立了短纤维增强聚合物注射成型流动数学模型。采用Moldflow对纤维增强聚合物在矩形薄板中的注射成型进行数值模拟。结果表明:沿宽度方向,矩形薄板两侧处的纤维取向程度高于薄板中部;沿流动方向,入口段和流动末端纤维取向较差,中段取向较好。随着熔体温度的升高,纤维取向值先增大后减小;而随着注射时间的增加,纤维取向值增大。
Based on the theory of Hele-Shaw and generalized Non Newtonian fluid constitutive equation, the flow mathematical model of injection molding of fiber reinforced polymer is established. Coupled with the RSC orientation model injection molding of fiber reinforced polymer is simulated by Moldflow software in rectangular mold. The results show that Along the width direction,the fiber orientation degree on both sides of rectangular mold is higher than orientation degree of the central plate; Along the flow direction, fiber orientation is poorer in the entrance section and the flow terminal piece, while fiber orientation is better in the middle piece. With the temperature of melt increasing, the fiber orientation value increases first and then decreases. Flow rate has little effect on the fiber orientation. And with the increase of injection time, fiber orientation value increase.
Based on the theory of Hele-Shaw and generalized Non Newtonian fluid constitutive equation, the flow mathematical model of injection molding of fiber reinforced polymer is established. Coupled with the RSC orientation model injection molding of fiber reinforced polymer is simulated by Moldflow software in rectangular mold. The results show that Along the width direction,the fiber orientation degree on both sides of rectangular mold is higher than orientation degree of the central plate; Along the flow direction, fiber orientation is poorer in the entrance section and the flow terminal piece, while fiber orientation is better in the middle piece. With the temperature of melt increasing, the fiber orientation value increases first and then decreases. Flow rate has little effect on the fiber orientation. And with the increase of injection time, fiber orientation value increase.
引文
[1]张晓明,刘雄亚.纤维增强热塑性复合材料及其应用[M].北京:化学工业出版社,2007.
[2]Jeffery G B. The motion of rigid particles in a shear flow an low reynolds number[J]. Journal of Fluid Mechanics,1922,14:284–304.
[3]Folgar F,Tucker C L. Orientation behavior of fibers in concentrated suspensions[J]. Journal of Reinforced Plastics and Composites,1984,3(2):98–119.
[4]Advani S G,Tucker C L. The use of tensors to describe and predict fiber orientation in short fiber composites[J].Journal of Rheology,1987,31(8):751–784.
[5]Liu H S,Xiong A H,Huang X Y. 3D numerical simulation research on the effect of gate location on fiber orientation and injection-molded deformation[J]. Advanced Materials Research,2012,472–475:403–410.
[6]上官林建,申长雨,刘保臣,等.短纤维复合材料注射成型纤维取向数值模拟研究进展[J].玻璃钢/复合材料,2009(3):86–88.
[7]Hung C F,Shen Y K. Numerical simulation of fiber orientation in injection mold filling[J]. International Communications in Heat&Mass Transfer,1995,22(6):791–802.
[8]Azaman M D,Sapuan S M,Sulaiman S,et al. Numerical simulation analysis of the in-cavity residual stress distribution of lignocellulosic(wood)polymer composites used in shallow thin-walled parts formed by the injection moulding process[J].Materials&Design,2014,55(6):381–386.
[9]熊爱华,柳和生,黄兴元,等.短玻璃纤维增强聚合物注塑充填过程及纤维取向数值模拟[J].高分子材料科学与工程,2012,28(3):161–164.
[10]江青松,柳和生,熊爱华,等.长纤维增强聚合物注塑流动纤维取向分布数值模拟[J].高分子材料科学与工程,2015,31(3):123–127.
[11]Monte M D,Moosbrugger E,Quaresimin M. Influence of temperature and thickness on the off-axis behaviour of short glass fiber reinforced polyamide 6.6-quasi-static loading[J]. Composites Part A:Applied Science&Manufacturing,2010,41(10):1368–1379.
[12]张红平,欧阳洁.纤维增强聚合物熔体的纤维取向和流场应力分析[J].复合材料学报,2007,24(6):153–159.
[13]陈艳霞,陈如香,吴盛金. Moldflow 2012中文版完全学习手册[M].北京:电子工业出版社,2012.
[2]Jeffery G B. The motion of rigid particles in a shear flow an low reynolds number[J]. Journal of Fluid Mechanics,1922,14:284–304.
[3]Folgar F,Tucker C L. Orientation behavior of fibers in concentrated suspensions[J]. Journal of Reinforced Plastics and Composites,1984,3(2):98–119.
[4]Advani S G,Tucker C L. The use of tensors to describe and predict fiber orientation in short fiber composites[J].Journal of Rheology,1987,31(8):751–784.
[5]Liu H S,Xiong A H,Huang X Y. 3D numerical simulation research on the effect of gate location on fiber orientation and injection-molded deformation[J]. Advanced Materials Research,2012,472–475:403–410.
[6]上官林建,申长雨,刘保臣,等.短纤维复合材料注射成型纤维取向数值模拟研究进展[J].玻璃钢/复合材料,2009(3):86–88.
[7]Hung C F,Shen Y K. Numerical simulation of fiber orientation in injection mold filling[J]. International Communications in Heat&Mass Transfer,1995,22(6):791–802.
[8]Azaman M D,Sapuan S M,Sulaiman S,et al. Numerical simulation analysis of the in-cavity residual stress distribution of lignocellulosic(wood)polymer composites used in shallow thin-walled parts formed by the injection moulding process[J].Materials&Design,2014,55(6):381–386.
[9]熊爱华,柳和生,黄兴元,等.短玻璃纤维增强聚合物注塑充填过程及纤维取向数值模拟[J].高分子材料科学与工程,2012,28(3):161–164.
[10]江青松,柳和生,熊爱华,等.长纤维增强聚合物注塑流动纤维取向分布数值模拟[J].高分子材料科学与工程,2015,31(3):123–127.
[11]Monte M D,Moosbrugger E,Quaresimin M. Influence of temperature and thickness on the off-axis behaviour of short glass fiber reinforced polyamide 6.6-quasi-static loading[J]. Composites Part A:Applied Science&Manufacturing,2010,41(10):1368–1379.
[12]张红平,欧阳洁.纤维增强聚合物熔体的纤维取向和流场应力分析[J].复合材料学报,2007,24(6):153–159.
[13]陈艳霞,陈如香,吴盛金. Moldflow 2012中文版完全学习手册[M].北京:电子工业出版社,2012.