锻压技术

铝合金板弯曲回弹试验与有限元仿真

英文标题：Test and FEM simulation of springback for aluminum alloy sheet bending

作者：王巍李东升李小强

单位：北京航空航天大学

分类号：TG316.1+4

出版年,卷(期):页码：2013,38(3):160-164

摘要：

采用NUMISHEET'2002会议提出的铝合金板6111-T4大曲率半径纯弯曲回弹试验方案，在不同冲压行程下，对板料不同轧制方向的回弹角、成形力等进行试验研究。基于有限元软件eta/Dynaform,运用Hill'48屈服准则和Barlat'89屈服准则，模型分别采用指数强化模型和线性强化模型进行有限元仿真，与试验结果对比表明：随着凸模行程增加，冲压力增大，回弹后夹角增大；采用Barlat'89屈服准则和指数强化模型板料回弹值精度最高，误差为8.86%；采用Hill'48屈服准则和指数强化模型次之，误差为14.67%；屈服准则的选取对预测板料回弹量有较大影响，而强化模式的选取对回弹量的影响则不显著。

Aluminium 6111-T4 large curvature radius of pure bending springback examples being put forward in the NUMISHEET' 2002 session was adopted to research springback angle and forming force of the different sheet rolling directions. Based on the Hill'48 yield criterion and Barlat'89 yield criterion from the finite element analysis software eta/Dynaform, finite element simulation was conducted. During this study process, the exponential hardening model and linear hardening model were used. Comparing the simulated results with the experimental results，it shows that the punch pressure increases with the increasing of the punch stroke, the springback angle increases as well; the simulated springback accuracy value is the highest and the error is 8.86% by adopting the Barlat'89 yield criterion and index hardening model, and the springback accuracy value obtained by adopting the Hill'48 yield criterion and index hardening model is smaller and the error is 14.67%; the mode of yield criterion has larger effects on springback value than hardening expression, and the hardening mode has little effect on springback value.

基金项目：

国家自然科学基金资助项目（50905008）；航空科学基金资助项目（2010ZE51050）

参考文献：

［1］余国庆,鲁世红.基于有限元分析的铝合金板料弯曲回弹的影响因素研究[J].机械科学与技术, 2005, 24(9):1077-1080.Yu G Q, Lu S H. Study of the influence factors on Aluminum alloy bending based on finite element analysis[J]. Mechanical Science and Technology, 2005,24(9):1077-1080.
［2］Wang C T . An industrial outlook for springback predictability, measurement reliability and compensation technology[A]. Proceedings of NUMISHEET'2002 [C]. Korea, Jeju Island,2002.
［3］Merlein M, Geiger M. New materials and production technologies for innovative lightweight constructions [J]. Journal of materials Processing Technology,2002,125~126(9):532-536.
［4］Halil Ibrahim Demirci, Cemal Esner, Mustafa Yasar. Effect of the blank holder force on drawing of aluminum alloy square cup:theoretical and experimental investigation [J]. Journal of Materials Processing Technology, 2008, 206(13):152-160.
［5］赵茂俞,薛克敏,李萍.多元非线性回归的铝合金覆盖件成形模拟优化设计[J].农业机械学报, 2008, 39(9):166-169.Zhao M Y, Xue K M, Li P. Numerical simulation and optimization of aluminum alloy auto panel forming by multivariate nonlinear regressing[J]. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(9):166-169.
［6］闫康康,胡平,郭威.铝合金板冲压成形benchmark试验与有限元仿真[J].农业机械学报, 2009, 40(11):232-235.Yan K K, Hu P, Guo W. Benchmark test and FEM simulation of aluminum alloy sheet forming[J]. Transactions of the Chinese Society for Agricyltural Machinry, 2009,40(11):232-235.
［7］Zhang Dongjuan,Cui Zhenshan,Ruan Xueyu,et al. Sheet springback prediction based on non\|linear combined hardening rule and Barlat89's yielding function[J].Computational Materials Science, 2006, 1003(40), 1218-1225.
［8］张冬娟,崔振山,李玉强,等.宽板大曲率半径纯弯曲回弹量理论分析[J].工程力学, 2006, 23(10):77-81.Zhang D J, Cui Z S, Li Y Q, et al. The springback of wide metal sheet after large radius pure bending[J]. Engineering Mechanics, 2006,23(10):77-81.
［9］唐炳涛,鹿晓阳,王兆清,等.无约束圆柱弯曲成形卸载回弹的数值模拟[J].山东建筑大学学报, 2007, 22(4):283-287.Tang B T, Lu X Y, Wang Z Q, et al. FEM simulation ang experimental study on sprngback of unconstrained cylindrical bending benchmark[J]. Journal of Shandong Jianzhu University, 2007,22(4):283-287.
［10］Dong\|Yol Yang, Soo IK Oh. NUMISHEET 2002(I)[A]. Proceedings of NUMISHEET 2002 [C].Korea:Jeju Island,2002.
［11］王银芝.基于Dynaform的方盒形体拉深成形的数值模拟与分析[J].机床与液压, 2011, 39(13):114-117.Wang Y Z. Numerical simulation and analysis of rectangular cases forming based on dynaform[J]. Machine Tool ＆ Hydraulics, 2011, 39(13):114-117.
［12］万敏,李东升,乔立红,等.板料成形计算机分析技术[M].北京:北京航空航天大学出版社, 2008:Wan M, Li D S, Qiao L H, et al. Sheet Metal Forming Computer Analysis Technique[M]. Beijing : Beihang University Press,2008.
［13］Hill R. The Mathematical Theory of Plasticity [M]. London:Oxford Unwersity Press,1950.
［14］Barlat F, Lian J. Plastic behavior and stretch ability of sheet metals Part I: a yield function for orthotropic sheets under plane stress conditions [J].Internation Journal of Plasticity, 1989, (5):51-66.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】