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Abstract：
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Geometrical description techniques of die is discussed in detail. These discussions givevaluable suggestions for selecting geometrical description method of die in 3D numerical simulation. Atlast, the development trends of die's geometrical description techniques is summarized.
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AuthorIntro：
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Reference：
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1王圣平.汽车覆盖件成形过程数值模拟研究.塑性工程学报.1996, 3(2)
2. Juipeng Tang, W T Wu,John Walters.Recent devel-opment and application of finite element metnod in metalforming.J.Mater.Process.Technol,1994.
3. Thierry Coupez,Nathalie Soyris and Jean LoupChenot.3D finite element modelling of the forging processwith automatic remeshing.J. Mater. Process. Technol,1991.
4王忠金.模锻过程的三维模拟及连杆终锻成形规律的研究吉林工业大学博士学位论文,1995
5陈军.虚拟模具制造及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.
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