反挤工艺三维刚塑性有限元模拟及其局部网格细分技术的应用
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英文标题:Three dimensional rigid plastic FEM simulation of backward extrusion & application of local mesh densification |
作者:陈军 阮雪榆 |
单位:上海交通大学国家模具CAD工程研究中心 |
关键词:反向挤压 刚塑性有限元 数值模拟 网格细分 |
分类号:TG37,TG37 |
出版年,卷(期):页码:1998,23(1):0-0 |
摘要:
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利用建立的通用三维刚塑性/刚粘塑性有限元数值模拟系统SimuⅢ对方坯料的反向挤压工艺进行了成形过程模拟,分析了金属的流动规律和初始网格划分不合理所引起的误差,进而提出采用局部网格细分以准确地模拟金属的变形规律,模拟结果与文献中的模拟结果和实验结果对比,非常吻合。
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This paper has simulated the square billet's backward extrusion process by using the general 3 D rigid plastic/rigid viscoplastic FEM simulation system SimuⅢ developed by ourselves, and analyzed the material flowing pattern and the error because of the incorrect mesh discretion, furthermore, the paper proposes the method of local mesh densification to simulate the forming process more precisely. Finally, the simulating results fit well with the reference's numerical results and the correspondingly experimental results.
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参考文献:
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1DYYang,NKLe,JHYon.Athre-dimensionalrigid-plasticfiniteelementanalysisofspurgearforgingusingthemodularremeshingtechniques.Proc.Instn.Mech.Engrs,Vol.205,1991,p111-1212JuipengTang,WTWu,JohnWalters.Recentdevel-opmentandapplicationoffiniteelementmethodinmetalform-ing.J.Mater.Proces.Technol.46(1994),p117-1263YTronelandJLChenot.Predictionoftolwearus-ingfiniteelementsoftwareforthethre-dimensionalsimulationofthehotforgingproces.J.Mater.Proces.Technol.31(1992),p255-2634陈军.虚拟模具制造及其金属成形过程三维仿真技术研究.上海交通大学博士学位论文,1996.5NKLe,JHYoonandDYYang.Finiteelementanalysisoflargedeformationbyautomaticrenodingasaweak-ingremeshingtechnique,Int.J.Mech.Sci,Vol,34,No.4,1992,p255-2736SKobayashi,SIOhandTAltan.MetalFormingandtheFiniteElementMethod.OxfordUniversityPres,NewYork,USA,1989.
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