[1]席道英,郑伟*.基于Voronoi图理论的微体积成形数值建模及验证[J].山东建筑大学学报,2019,34(06):45-49.[doi:10.12077/sdjz.2019.06.008]
 XI Daoying,ZHENG Wei*.Modeling and numerical simulation of micro-plastic forming based on Voronoi diagram[J].Journal of Shandong jianzhu university,2019,34(06):45-49.[doi:10.12077/sdjz.2019.06.008]
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基于Voronoi图理论的微体积成形数值建模及验证()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
34
期数:
2019年06期
页码:
45-49
栏目:
研究论文
出版日期:
2019-12-01

文章信息/Info

Title:
Modeling and numerical simulation of micro-plastic forming based on Voronoi diagram
文章编号:
1673-7644(2019)06-0045-05
作者:
席道英郑伟*
(山东建筑大学 工程力学研究所,山东 济南 250101)
Author(s):
XI Daoying ZHENG Wei*
(Institute of Engineering Mechanics, Shandong Jianzhu University, Jinan 250101, China)
关键词:
Voronoi图理论数值模拟微成形尺寸效应晶粒取向
Keywords:
Voronoi diagram theory numerical simulation micro forming size effect grain orientation
分类号:
TG301
DOI:
10.12077/sdjz.2019.06.008
文献标志码:
A
摘要:
数值模拟作为微塑性成形技术的核心方法之一,与实验相结合,能够减少工艺开发的时间和成本,具有经济和学术价值。文章基于Voronoi图理论,利用MATLAB和Python汇编语言建立了一种在ABAQUS软件中运行的多晶几何模型,对微塑性成形进行有限元建模和数值模拟,根据晶粒分布和取向特点以及表面层模型理论,修正宏观的Hall-Petch公式,建立了一种区域化本构模型,再利用所建立的几何模型和本构模型,通过有限元软件ABAQUS实现了微塑性成形的数值模拟。结果表明:三维多晶几何模型的数值模拟可以更真实地表现试样的晶粒形状,有限元多晶模型证实了尺度效应现象及晶粒分布的不均匀性;所建立的材料多晶几何模型和区域化本构模型具有一定的可靠性,提出的建模方法可用于分析微塑性成形过程的尺寸效应现象。
Abstract:
Numerical simulation is one of the core methods of micro-plastic forming technology. The numerical simulation method is used to analyze, adjust and optimize the process plan and combine it with the experiment, which can reduce the process development time and cost. In this paper, based on Voronoi diagram theory, the finite element modeling and numerical simulation of micro-plastic forming are studied. By means of MATLAB and Python assembly language, a method of establishing polycrystalline geometric model in ABAQUS software is proposed, which can be applied to the finite element modeling of micro-plastic forming. According to the characteristics of grain distribution and orientation as well as the surface layer model theory, the macroscopic Hall-Petch formula was revised to establish a regional constitutive model. Then, the geometric model and constitutive model were used to realize the numerical simulation of micro-plastic forming by the finite element software ABAQUS. The results show that the numerical simulation of three-dimensional polycrystalline geometry model can show the grain shape of the sample more realistically. The finite element polycrystalline model confirms the phenomenon of scale effect and the inhomogeneity of grain distribution. The model of polycrystalline geometry and the regional constitutive model are reliable. The modeling method can be used to analyze the size effect of micro-plastic forming process.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-11-07 基金项目:国家自然科学基金青年科学基金项目(51505256)作者简介:席道英(1994-),女,在读硕士,主要从事微塑性成形等方面的研究. E-mail:1599301818@qq.com 通讯作者*:郑伟(1982-),男,副教授,博士,主要从事金属塑性成形等方面的研究. E-mail: 23195420@qq.com
更新日期/Last Update: 2019-10-21