锻压技术

金属成形模拟过程中局部网格重划技术研究

英文标题：Research on an automatic local remeshing technique for metal forming simulation

作者：黄绍泽朱江新

单位：广西大学

分类号：O242.21;TG386

出版年,卷(期):页码：2012,37(5):137-140

摘要：

针对金属成形模拟过程中网格畸变问题，提出了一种自动局部网格重划分技术。首先通过计算单元变形度的方法判断是否需要重划并标记出变形网格；然后利用特征线和特征面提取法得到变形局部的轮廓线和面；依照得到的轮廓划分网格；网格重划后利用面积加权平均法实现新旧网格信息的传递。通过ANSYS的参数化设计语言APDL编程来实现该技术，并通过对冲头压入过程的模拟分析，验证了该方法的可行性。

To solve the mesh distortion in metal forming simulation,a local remeshing technique was presented. The calculation of element shape was used to determine when to remesh and specify the distorted element, and the characteristic of element boundaries was used to fetch contour of remeshing areas. After rezoning the remeshing areas, remapping algorithms was used to remap physical variables. ANSYS software and the secondary development tools APDL of ANSYS were used for the realization of this method. This method was proved by the simulation of punch process.

基金项目：

广西制造系统与先进制造技术重点实验室基金资助项目（09-007-05S022）

参考文献：

［1］Slimani F, Cherouat A, Ayadi M, et al. Strain hardening analysis coupled to remeshing procedure application to sheet hydroforming processes[J]. Advanced Materials Research,2011, 418: 1255-1258.
［2］王纪武. 三维有限变形弹塑性有限元法及网格重划技术的研究[D]. 北京：清华大学, 1999.
［3］胡忠, 王志诚, 陈国学, 等. 塑性有限元数值模拟的二维及三维网格重划技术[J]. 清华大学学报, 1996, 36(3): 78-83.
［4］郭晓霞, 刘建生, 陈慧琴, 等. 大变形有限元中二维网格自动重分技术[J]. 塑性工程学报, 2002,3(9): 20-24.
［5］黄志超, 包忠诩, 周天瑞. 金属成形三维有限元网格重划技术研究[J]. 锻压技术, 2004,29(5): 35-39.
［6］Yasushi Ito, Alan Shih M, Soni B K . Three-dimensional automatic local remeshing for two or more hybrid meshes[J]. Int.J.Numer.Meth.Fluids, 2011, (66): 1495-1505.
［7］Son I H , Im Y T. Localized remeshing techniques for threedimensional metal forming simulations with linear tetrahedral elements[J].Int.J.Numer.Meth.Engng.,2006,(67): 672-696 .
［8］Martin Wicke, Daniel Ritchie, Klingner B M , et al. Dynamic local remeshing for elastoplastic simulation[J]. ACM Transactions on Graphics, 2010, 29(4): 1-11.
［9］Lin Zhi-wei, Jiang Shao\|en, Wu Shun-chao, et al. A local rezoning and remapping method for unstructured mesh[J]. Computer Physics Communications, 2011, (182): 1361-1376.
［10］Dae-Young Kwak, Jae\|Seung Cheon, Yong-Taek Im. Remeshing for metal forming simulations-Part I: Two\|dimensional quadrilateral remeshing[J]. Int.J.Numer.Meth.Engng., 2002, (53): 2463-2500.
［11］Liu D , Luo Z J, Gu M X . The algorithm of automatic local mesh subdivision and its application to finite-element analysis of a large deformation forming process[J]. Journal of Materials Processing Technology, 1998, (83): 164-169 .
［12］Zhu J Z, Zienkiewicz O C, Hinton E, et al. A new approach to the development of automatic quadrilateralmesh generation[J]. Int.J.Numer.Meth.Engng.,1991,(32):849-866.
［13］Ted D Blacker, Michael B Stephenson. Paving: A new approach to automated quadrilateral mesh generation [J]. Int.J.Numer.Meth.Engng., 1991, (32): 811-847.
［14］朱江新. 切削挤压成形过程分析与建模方法研究[D]. 西安：西安理工大学,2006.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】