长纤维增强聚合物注塑纤维长度分布三维数值模拟

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (10): 32-37.

长纤维增强聚合物注塑纤维长度分布三维数值模拟

江青松,柳和生^*

南昌大学机电工程学院聚合物成型研究室,南昌330031

收稿日期:2016-05-18 出版日期:2016-11-25 发布日期:2016-11-25
通讯作者: 柳和生(1965-),男,博士,教授,主要从事高分子材料成型加工方面的研究,hsliu@vip.163.com。
作者简介:江青松(1978-),男,博士,主要从事聚合物成型机械设计及理论方面的研究。
基金资助:
江西省自然科学基金资助项目(20142BAB206030)

THREE-DIMENSIONAL NUMERICAL SIMULATION ON THE FIBER LENGTH DISTRIBUTION IN INJECTION MOLDING OF LONG FIBER REINFORCED POLYMER

JIANG Qing-song,LIU He-sheng^*

Polymer Processing Research Lab, School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, China

Received:2016-05-18 Online:2016-11-25 Published:2016-11-25

摘要/Abstract

摘要： 基于Phelps-Tucker纤维断裂模型,以中心浇口圆盘为研究对象,采用Moldflow对长纤维增强聚合物注塑流动过程进行三维数值模拟,研究流动速率、熔体温度、模具温度和保压压力对纤维长度分布的影响规律,并探讨其产生的机理。结果表明,浇口附近是最长纤维和最短纤维的共存区;近壁面处纤维长度较中心层长;随着流动速率、模具温度和保压压力的增加,纤维长度均减小;随着熔体温度的增加,纤维长度先减小后增大;在近壁面处保压压力对纤维长度的影响不大。以上结果与文献对比总体吻合较好。

关键词: 长纤维增强聚合物, 注塑, 纤维长度分布, 影响因素, 三维数值模拟

Abstract: Based on Phelps-Tucker fiber breakage model, a center-gated disk was used for a three-dimensional numerical simulation during flow in injection molding of long fiber reinforced polymer by using Moldflow. The effects of flow rate, melt temperature, mold temperature and holding pressure on fiber length distribution were investigated, and the mechanisms were discussed. The results show that the longest and shortest fibers coexist near the gate, and the fiber length near the wall is larger than that of central layer. With flow rate, mold temperature and holding pressure increasing, the fiber length increases correspondingly. With the increase of melting temperature, the fiber length decrease first and then increase. Holding pressure near the wall has minimal impact on fiber length. These results from numerical simulation agree well with the corresponding references.

Key words: long fiber reinforced polymer, injection molding, fiber length distribution, influencing factor, three-dimensional numerical simulation

中图分类号:

TB332

江青松,柳和生. 长纤维增强聚合物注塑纤维长度分布三维数值模拟[J]. 玻璃钢/复合材料, 2016, 0(10): 32-37.

JIANG Qing-song,LIU He-sheng. THREE-DIMENSIONAL NUMERICAL SIMULATION ON THE FIBER LENGTH DISTRIBUTION IN INJECTION MOLDING OF LONG FIBER REINFORCED POLYMER[J]. Fiber Reinforced Plastics/Composites, 2016, 0(10): 32-37.

参考文献

[1] 王婧, 祝海峰, 高红梅, 等. LFT-D碳纤维增强尼龙性能研究[J]. 玻璃钢/复合材料, 2013(2): 74-76.
[2] Garesci F, Fliegener S. Young′s modulus prediction of long fiber reinforced thermoplastics[J]. Composites Science and Technology, 2013(85): 142-147.
[3] 沈玉考. 长纤维增强热塑性复合材料模塑技术新动向[J]. 玻璃钢/复合材料, 2004(2): 53-55.
[4] 方鲲, 张国荣, 吴丝竹, 等. 长纤维增强热塑性复合材料在汽车零配件上的应用进展[J]. 中国塑料, 2009(3): 13-18.
[5] Phelps J H, Abd El-Rahman A I, Kunc V, et al. A model for fiber length attrition in injection-molded long-fiber composites[J]. Composites Part A: Applied Science and Manufacturing, 2013, 51: 11-21.
[6] 咸贵军, 益小苏, 胡永明, 等. 注塑成型长玻璃纤维/聚丙烯复合材料的冲击韧性[J]. 复合材料学报, 2001, 18 (2): 36-40.
[7] 张宇, 段召华, 陈弦, 等. 注塑工艺参数对长玻纤增强PA66复合材料力学性能的影响 [J]. 塑料科技, 2011, 39 (2): 65-69.
[8] 曹伟, 王蕊, 申长雨. 塑料熔体在注塑模中的三维流动模拟[J]. 化工学报, 2004, 55 (9): 1493-1498.
[9] 耿铁, 李德群, 周华民. 全三维注塑成形流动模拟有限元模型的研究[J]. 中国机械工程, 2006, 17 (5): 505-509.
[10] Phelps J H. Processing-microstructure Models for Short- and Long-fiber Thermoplastic Composites[D]. Urbana-Champaign: University of Illinois, 2009.
[11] Steven D M, Robert A C. A rheological equation state for semi-concentrated fibre suspensions[J]. Journal of Rheology, 1984, 28 (3): 207-227.
[12] Phelps J H, Tucker III C L. An anisotropic rotary diffusion model for fiber orientation in short- and long-fiber thermoplastics [J]. Journal of Non-Newtonian Fluid Mechanics, 2009, 156(3): 165-176.
[13] 熊爱华, 柳和生, 黄兴元, 等. 短玻纤增强聚丙烯复合材料气体辅助注塑成型真三维模拟[J]. 高分子材料科学与工程, 2012(9): 182-186.
[14] Nguyen B N, Bapanapalli S K, Holbery J D, et al. Fiber Length and Orientation in Long-Fiber Injection-Molded Thermoplastics-Part I: Modeling of Microstructure and Elastic Properties[J]. Journal of Composite Materials, 2008, 42(10): 1003-1029.
[15] Metten M, Cremer M. Injection Moulding of Long-Fibre-Reinforced Thermoplastics[J]. Kunststoffe Plast Europe, 2000, 90 (78): 35-36.
[16] 钟世云, 梁昊. 影响长纤维增强热塑性塑料注塑制品中纤维长度的主要因素[J]. 合成材料老化与应用, 2004(1): 28-32.