[1]娄燕,裴九龙,何培乾,等.基于分子链段长度的微观黏度模型研究[J].深圳大学学报理工版,2013,30(No.6(551-660)):629-635.[doi:10.3724/SP.J.1249.2013.06629]
 Lou Yan,Pei Jiulong,He Peiqian,et al.Research on a micro-viscosity model based on the molecular chain length[J].Journal of Shenzhen University Science and Engineering,2013,30(No.6(551-660)):629-635.[doi:10.3724/SP.J.1249.2013.06629]
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基于分子链段长度的微观黏度模型研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第30卷
期数:
2013年No.6(551-660)
页码:
629-635
栏目:
材料科学
出版日期:
2013-09-30

文章信息/Info

Title:
Research on a micro-viscosity model based on the molecular chain length
文章编号:
20130613
作者:
娄燕裴九龙何培乾柯昌星伍晓宇
深圳市模具先进制造技术重点实验室,深圳大学机电与控制工程学院,深圳 518060
Author(s):
Lou Yan Pei Jiulong He Peiqian Ke Changxing and Wu Xiaoyu
Shenzhen Key Laboratory of Advanced Manufacturing Technology for Mold & Die, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, P.R.China
关键词:
精密制造微观黏度模型微注塑填充率分子链段长度流动行为
Keywords:
precision manufacturing micro-scale viscosity model micro injection molding filling ratio molecular chain length flow behavior
分类号:
TH 16
DOI:
10.3724/SP.J.1249.2013.06629
文献标志码:
A
摘要:
借鉴传统流体Cross_Law宏观黏度模型,引入基于分子链段长度的尺寸修正因子,建立反映微尺度流动特性的微观黏度模型.通过对比厚度为70和80 μm薄板注塑填充率的实验与数值仿真结果,验证所建模型的准确性,分析微观黏度对微流动的影响规律.结果表明,随流道特征尺寸减小,微观黏度值减小,但维持相同流动速度的注射压力增大,流体剪切速率增大,而流道中心流速基本不变,熔体黏度最大值位置逐渐偏离流道中心.
Abstract:
According to the traditional Cross_Law model, a new micro-scale viscosity model reflecting the micro flow characteristics was established by introducing the dimension correction factor based on the molecular chain length. The model was verified by comparing the simulation filling ratio with micro injection experimental filling ratio of the 80 μm and 70 μm thick sheets. The research of the influence of micro-scale viscosity on melt flow was carried out by analyzing the change of viscosity distribution, injection pressure and flow velocity. The results show that along with the decrease of feature size of injection mold, the micro-scale viscosity becomes smaller and the injection pressure has to increase to maintain the same flow velocity. In addition, the shear rate increases and the position of max melt viscosity gradually deviates from the flow center because of the micro channel.

参考文献/References:

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备注/Memo

备注/Memo:
Received:2012-12-25;Accepted:2013-04-09
Foundation:National Natural Science Foundation of China (51175348); Shenzhen Science and Technology Foundation (JCYJ20120917163755066)
Corresponding author:Professor Lou Yan. E-mail: susanlou121@163.com
Citation:Lou Yan, Pei Jiulong, He Peiqian, et al. Research on a micro-viscosity model based on the molecular chain length[J]. Journal of Shenzhen University Science and Engineering, 2013, 30(6): 629-635.(in Chinese)
基金项目:国家自然科学基金资助项目(51175348); 深圳市科技计划资助项目(JCYJ20120917163755066)
作者简介:娄燕(1971-),女(汉族),四川省成都市人,深圳大学教授. E-mail: susanlou121@163.com
引文:娄燕,裴九龙,何培乾,等. 基于分子链段长度的微观黏度模型研究[J]. 深圳大学学报理工版,2013,30(6):629-635.
更新日期/Last Update: 2013-11-20