Investigation into formation mechanism of nano-crystalline/ultra-fine grained chip via finite element method

被引：0
|
作者：
Wu C.-L. [1 ]
Ye B.-Y. [1 ]
机构：
[1] School of Mechanical and Automotive Engineering, South China University of Technology
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2010年 / 38卷 / 08期
关键词：
Finite element simulation; Large-strain machining; Microstructure; Nano-crystalline/ultra-fine grained chip;
D O I：
10.3969/j.issn.1000-565X.2010.08.015
中图分类号：
学科分类号：
摘要：
In this paper, first, a large-strain model describing the machining with large negeative rake angle and blunt round radius is established. Then, the effects of the tool rake angle and the blunt round radius on the chip shape, the effective strain and stress, the strain rate, the cutting temperature and the main cutting force during the cutting at a relatively low cutting speed are analyzed with the finite element software. The results indicate that (1) with the decrease in the tool rake angle and with the increase in the blunt round radius, the effective strain and stress, the strain rate, the cutting temperature and the main cutting force all increase, especially with the tool rake angle; (2) the effect of the blunt round radius weakens at a negative tool rake angle; and (3) large strains are imposed on the chip at a low temperature and a high stress and strain rate, which helps to produce nano-crystalline/ultra-fine grained chip materials with high hardness by the cutting with large negative tool rake angle and low cutting speed.
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页码：78 / 82
页数：4
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