Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (9): 104-110.

• Materials Science & Technology • Previous Articles     Next Articles

Numerical Simulation of Melting Process in Single·Screw Extruder Under Vibration Force Field

Feng Yan-hong  Qu Jin-ping  Liu Bin  He He-zhi  Jin Gong  Zou Xin-liang   

  1. National Engineering Research Center of Novel Equipment for Polymer Processing,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-09-23 Online:2006-09-25 Published:2006-09-25
  • Contact: 冯彦洪(1976-)，女，博士，讲师，主要从事聚合物材料加工研究 E-mail:yhfeng@scut.edu.cn
  • About author:冯彦洪(1976-)，女，博士，讲师，主要从事聚合物材料加工研究
  • Supported by:

    国家自然科学基金资助项目(10590351，10472034)；广东省自然科学基金博士科研启动基金资助项目(04300096)；华南理工大学自然科学基金资助项目(110E5041190)

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Abstract:

In order to investigate the effect of vibration force field on the melting process in a single-screw extruder,a simplified 2 D dynamic melting model is established by adopting the assumption of”flowing solid”and the theory of hydrokinetics to solve the problem in the whole melting region.Thus,the problems of phase change and the so-lid-melt interface track are successfully solved. Moreover,as the melting process is of a non-isothermal phase change and the polymer presents time-dependent nonlinear viscoelastic characteristics in vibration force field, a self-amended non-isothermal Maxwell viscoelastic constitutive model that reflects the relaxation time spectrum of the polymer is developed.The dynamic melting process is finally simulated,followed by the analysis of the effects of vi-bration frequency and amplitude on the melting process.

Key words: vibration force field, single screw, dynamic melting, numerical simulation, relaxation time spectrum, non-isothermal viscoelastic c0nstitutive model