Numerical analysis of single crystal Fe with abrasive grain micro-cutting based on molecular dynamics

被引：0
作者：
Li J.-Y. [1 ,2 ]
Liu Y. [1 ]
Lu H. [1 ]
Meng W.-Q. [1 ]
Yang Z.-J. [2 ]
Zhang X.-M. [1 ]
机构：
[1] Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing, Changchun University of Science and Technology, Changchun
[2] School of Mechanical and Aerospace Engineering, Jilin University, Changchun
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2019年 / 49卷 / 05期
关键词：
Abrasive flow; Atomic displacement; Crystal structure; Mechanical design; Micro-cutting; Molecular dynamics; Single crystal Fe;
D O I：
10.13229/j.cnki.jdxbgxb20180623
中图分类号：
学科分类号：
摘要：
In order to explore the mechanism of workpiece material removal during abrasive flow machining, the molecular dynamics method was used to simulate the machining process that SiC particles micro-cut single crystal Fe. The microscopic mechanism of action that affects the cutting force variation and the reasons for the continuous fluctuation of cutting force in the process are studied. The internal reasons of physical change of workpiece material and the working law of abrasive grains on workpiece are revealed under the micro-cutting process. Through the analysis of atomic displacement, it can be seen that the plastic deformation of the material in the micro-cutting process is mainly caused by the slip region generated in the sliding surface of the crystal lattice to form dislocations, and the atoms move along dislocation lines. At the same time, the accumulation of atoms and the mechanism of chip formation are discussed. The polyhedron template matching method was used to analyze the arrangement of workpiece atoms in the micro-cutting process, and the variation of the lattice structure in the workpiece material was discussed. The research can provide theoretical basis and technical support for processing single crystal Fe with abrasive flow machining. © 2019, Jilin University Press. All right reserved.
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页码：1567 / 1574
页数：7
相关论文
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