Acta Metallurgica Sinica (English Letters) ›› 2012, Vol. 25 ›› Issue (1): 47-54.DOI: 10.11890/1006-7191-121-47

• 研究论文 • 上一篇    下一篇

二维高速压制成形的格子玻尔兹曼方法模拟

李俏杰1,郑洲顺1,曲选辉2   

  1. 1. 中南大学
    2.
  • 收稿日期:2011-04-07 修回日期:2011-06-29 出版日期:2012-02-25 发布日期:2012-02-16
  • 通讯作者: 李俏杰

Simulation of high velocity compaction of powder in a two dimension mould using lattice Boltzmann method

Qiaojie LI1, Zhoushun ZHENG 1, Xuanhui QU2
   

  1. 1. School of Mathematical Science and Computing Technology, Central South University, Changsha 410083, China
    2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2011-04-07 Revised:2011-06-29 Online:2012-02-25 Published:2012-02-16
  • Contact: Zhoushun ZHENG

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摘要： 本文将多速度可压缩格子Boltzmann模型用于高速压制成形过程的模拟。对顶部边界进行特殊处理使其能模拟压制动态过程；根据粉末的流动特性，用一个动态的松弛函数来代替固定的松弛时间，分别对二维规则模具的压制过程进行模拟。数值模拟很好的呈现了压制过程中的冲击波；对其密度进行了分析以期对高速压制的成形机理进行初步的探索。

Abstract: This work presents a numerical study on the dynamic high velocity compaction of the metal powder. The analysis of the process is based on a mesoscopic approach using multi-speed lattice Boltzmann method. The boundary condition and the relaxation time are tailored to the situation. The dynamic compaction process is vividly presented and the shock wave can be easily found in the simulation. The density is analyzed in order to explore themechanism of the high velocity compaction.

Key words: High velocity compaction, Lattice Boltzmann method, Shock wave, Relaxation time function