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 (8): 1185-1188.DOI: -

• 论著 • 上一篇    下一篇

基于流线理论计算正交切削中应变率和应变的方法

毕雪峰;刘永贤;Gautier LIST;刘阳;   

  1. 东北大学机械工程与自动化学院;LPMM Université de Metz;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-08-15 发布日期:2013-06-22
  • 通讯作者: Bi, X.-F.
  • 作者简介:-
  • 基金资助:
    国家“十一五”重大专项科技支撑计划项目(2006BAF01A19)

Calculating strain rate and strain during orthogonal cutting in accordance to streamline theory

Bi, Xue-Feng (1); Liu, Yong-Xian (1); List, Gautier (2); Liu, Yang (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; (2) Laboratoire de Physique et Mécanique des Matériaux, Université de Metz, Metz 57045, France
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-08-15 Published:2013-06-22
  • Contact: Bi, X.-F.
  • About author:-
  • Supported by:
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摘要： 依据流体力学中的流线理论,选用了一个较为通用的流线模型,对正交金属切削时的塑性变形进行了分析研究.对实验获得的切削中的流线轨迹和流线模型进行拟合,确定了模型中的几何参数.应用流线理论和塑性理论相结合的方法,计算了剪切区的应变率分布,其结果与前人的实验和计算结果基本吻合,说明此流线模型可以用来分析金属切削中的塑性变形.对应变率进行数值积分,得到了剪切区的应变分布.根据计算的应变结果,提出了一种定义剪切区形状的方法.

关键词: 正交切削, 塑性变形, 流线模型, 应变, 剪切区形状

Abstract: The plastic deformation of metal during orthogonal cutting was analyzed according to the streamline theory in fluid mechanics, with a general streamline model introduced. The geometrical parameters in this model were determined by fitting the flow lines traced in experiments with the streamline model. Then, the distribution of strain rate in primary shear zone was calculated via combining the streamline analysis with plasticity theory. The results revealed that the distribution thus calculated conforms to the experimental results in earlier works, i.e., the streamline model is available to analyze the plastic deformation during metal cutting. The distribution of strain in primary shear zone is given by numerical integration. A new method is therefore proposed defining the shape of shear zone in accordance to the results of strain.

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