东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (3): 418-421.DOI: -

• 论著 • 上一篇    下一篇

基于SPH法的金属切削大变形数值模拟

宿崇;侯俊铭;朱立达;王宛山;   

  1. 东北大学机械工程与自动化学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-03-15 发布日期:2013-06-22
  • 通讯作者: Su, C.
  • 作者简介:-
  • 基金资助:
    教育部高等学校博士学科点专项科研基金资助项目(20060145017)

SPH-based numerical simulation for big deformation during metal cutting

Su, Chong (1); Hou, Jun-Ming (1); Zhu, Li-Da (1); Wang, Wan-Shan (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-03-15 Published:2013-06-22
  • Contact: Su, C.
  • About author:-
  • Supported by:
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摘要： 采用光滑质点流体动力学法对金属切削过程中复杂的材料本构行为进行了数值模拟,进而分析了切削加工中的基本规律.模拟结果表明,切削过程是切削层材料受刀具的挤压而产生的以剪切滑移为主的塑性变形过程;堆积在刀尖处的材料屈服强度提高,接触应力增大,使得工件表面产生显微裂纹;切削过程中,切削力逐渐增大,最后保持在一定范围内平稳变动;形成切屑后,前刀面上的最大接触应力在距离切刃一定距离处上下变动,在该位置处刀具的磨损较为严重.

关键词: 金属切削, 数值模拟, 有限元法, SPH法

Abstract: A numerical simulation was conducted using SPH for the constitutive behavior during metal cutting for complex materials, and the basic rules in metal cutting process were analyzed. The simulation results showed that the cutting process is actually a plastic deformation process in which the material layer being cut forms shearing slip because of the extrusion by cutting tool. The yield strength of the agglomerated material due to extrusion increases in the vicinity of cutting edge. It makes contact stress increase, and eventually results in microcrack on workpiece surface. The cutting force increases gradually, and then varies steadily in a certain range in the cutting process. After the formation of chip, the maximum contact stress on rake fluctuates at a certain distance to the cutting edge, where the cutting-tool is heavily worn.

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