分体式下模压印接头成形的有限元模拟及接头微观组织
Finite Element Simulation of Segmented Die Clinched Joint Deformation and Microstructure of Joint
摘 要
采用有限元方法模拟了5052铝合金板的分体式下模压印连接过程, 并与整体式下模压印过程的模拟结果进行了对比;对板料在分体式下模中的流动特征进行了模拟;对分体式下模压印接头阳极化覆膜后, 利用微分干涉相衬法(DIC)对显微组织进行了分析, 从微观角度观察分析了分体式下模压印连接成形过程中板料的流动。结果表明: 模拟得到的分体式下模压印接头的颈厚和镶嵌量能较好地与试样的变形特征参数相符;压印接头区域的显微组织由原来的块状晶粒变成了纤维状, 晶粒被拉长细化;分体式下模压印连接过程中板料流动的模拟结果与试验结果相吻合。
有限元模拟
分体式下模
显微组织
clinching
finite element simulation
segmented die
microstructure
Abstract
A finite element simulation about the forming principle and the process of clinched joint of aluminum alloy 5052 with segmented die was conducted, comparing with the simulation of integrate die and analyzing the metal flow in segmented die during clinching process. The samples of clinched joint with segmented die were prepared by anodizing the membrane and DIC was used for observing the microstructure of the clinched joint to analyze the metal flow in microscopic view. The results show that the simulation with segmented die obtained a better neck thickness and undercut, showing a good agreement with experimental results. Blocky grain of the microstructure in clinched joint changed into fibrous structure, with the grain stretched refining. And the flowing direction during the clinching process with segmented die of the simulation results was consistent with the experimental ones.
中图分类号 TG379
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(50965009)
收稿日期 2012/8/10
修改稿日期 2013/5/11
网络出版日期
作者单位点击查看
备注郑俊超(1986-), 男, 湖北宜昌人, 硕士研究生。
引用该论文: ZHENG Jun-chao,HE Xiao-cong,XING Bao-ying,DING Yan-fang,ZENG Kai. Finite Element Simulation of Segmented Die Clinched Joint Deformation and Microstructure of Joint[J]. Materials for mechancial engineering, 2013, 37(9): 79～83
郑俊超,何晓聪,邢保英,丁燕芳,曾凯. 分体式下模压印接头成形的有限元模拟及接头微观组织[J]. 机械工程材料, 2013, 37(9): 79～83
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参考文献
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【2】HE X. Coefficient of variation and its application to strength prediction of clinched joints[J].Advanced Science Letters, 2011, 4(4/5): 1757-1760.
【3】HAMEL V, ROELANDT J M, GACEL J N, et al. Finite element modeling of clinch forming with automatic remeshing[J].Computers and Structures, 2000, 77: 185-200.
【4】PAULA A A D, AGUILAR M T P, PERTENCE A E M, et al. Finite element simulations of the clinch joining of metallic sheets[J].Journal of Materials Processing Technology, 2007, 182: 352-357.
【5】MUCHA J. The analysis of lock forming mechanism in the clinching joint[J].Materials and Design, 2011, 32: 4943-4954.
【6】VARIS J P. The suitability for round clinching tools for high-strength structural steel[J].Thin-Walled Structures, 2002, 40(3): 225-238.
【7】VARIS J P. The suitability of clinching as a joining method for high-strength structural steel[J].Journal of Materials Processing Technology, 2003, 132(1/3): 242-249.
【8】VARIS J P, LEPISTO J. A simple testing-based procedure and simulation of the clinching process using finite elements analysis for establishing clinching parameters[J].Thin-Walled Structures, 2003, 41: 691-709.
【9】OUDJENE M, BEN-AYED L, DELAMEZIERE A, et al. Shape optimization of clinching tools using the response surface methodology with Moving Least-Square approximation[J].Journal of Materials Processing Technology, 2009, 209: 289-296.
【10】LEE C J, KIM J Y, LEE S K, et al. Design of mechanical clinching tools for joining of aluminium alloy sheets[J].Materials and Design, 2010, 31: 1854-1861.
【11】LEE C J, KIM J Y, LEE S K, et al. Parametric study on mechanical clinching process for joining aluminum alloy and high-strength steel sheets[J].Journal of Materials Processing Technology, 2010, 24: 123-126.
【12】冯模盛, 何晓聪, 严柯科, 等.压印连接工艺过程的数值模拟及实验研究[J].科学技术与工程, 2011, 11(23): 5538-5541.
【13】丁刚毅.ANSYS/LS-DYNA算法基础与使用方法;M].北京: 北京理工大学出版社, 1999.
【14】陈祥, 宋晋生, 李言祥.微分干涉相衬法在材料显微分析中的应用[J].实验技术与管理, 2003, 20(3): 19-23.
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