Transactions of Materials and Heat Treatment

Title：Numerical simulation of electromagnetic ring expansion

Authors： LI Feng HUANG Shang-yu LIU Peng(School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China)

Unit：

KeyWords： electromagnetic ring expansion numerical simulation electromagnetic force plastic strain accessorial tube

ClassificationCode：TG391

year,vol(issue):pagenumber：2008,33(6):74-78

Abstract：

Electromagnetic ring expansion is one of the most important methods in studying deformation laws of high rate forming.The distribution of ring's electromagnetic force affects its deformation mode.Two projects were designed to simulate electromagnetic force and deformation distribution with FEA.It indicates that original free electromagnetic ring expansion leads to inhomogeneity of deformation due to uninformed electromagnetic force.The method was improved by using the same material tube accessed at both end of the ring and completely uniformed radial electromagnetic force and consistent plastic strain distribution were got to make measurements and analysis simple.It is proved to be a more effective method in studying high rate deformation.

Funds：

塑性成形模拟及模具技术国家重点实验室资助项目(05-03)

Reference：

[1]Mala Seth.High velocity formability and factors affecting it[D].Ohio:The Ohio State University,2006.
[2]William H.Gourdin.Analysis and assessment of electromag-netic ring expansion as a high-strain-rate test[J].J.Apply.Phys.,1988,65(2):411-422.
[3]Grady D E,Benson D A.Fragmentation of metal rings by e-lectromagnetic loading[J].Experimental Mechanics,1983,23(4):393-400.
[4]Altynova MM.The improved ductility of aluminum and cop-per rings by electromagnetic forming technique[D].Ohio:The Ohio State University,1995.
[5]Altynova M,Hu XY,Daehn GS.Increased ductility in elec-tromagnetic ring expansion[J].Metal Mater.Trans.A,1996,27(7):837-844.
[6]Tamhane Amit,Altynova Marina M,Daehn Glenn S.Effectof sample size on ductility in electromagnetic expansion[J].Scripta Materialia,1996,34(8):1345-1350.
[7]黄尚宇,常志华,田贞武,等.管件电磁成形电磁力分布特性分析[J].塑性工程学报,2000,7(2):30-34.

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