Transactions of Materials and Heat Treatment

Title：Study of high velocity constitutive equation of copper based on lectronmagnetic ring expansion

Authors： LI Zheng HU Jian-hua MENG Zheng-hua LI Feng(School of Materials Science and Engneering Wuhan University of Technology Wuhan 430070 China)

Unit：

KeyWords： high velocity forming constitutive model copper electromagnetic ring expansion HVF constitutive equation

ClassificationCode：TG391

year,vol(issue):pagenumber：2009,34(4):156-158

Abstract：

High velocity forming was studied based on electromagnetic forming method.It is summarized that the change of constitutive relation is an important factor effecting the material high velocity formability.The strain-rate improvement determines the constitutive change.So the HVF constitutive model of copper was researched based on the electromagnetic ring expansion with accessorial tube method,which had a uniform electromagnetic force and it was setup based on the excessive stress model and the research data.The result of finite element simulation declares that the HVF constitutive model of copper can express rightly about the formability of metals in HVF compared to the constitutive model based on quasi-static forming.

Funds：

国家自然科学基金资助项目(50875192)

Reference：

[1]李春峰.高能率成形技术[M].北京:机械工业出版社,2001.
[2]杨桂通.塑性动力学[M].北京:高等教育出版社,2000.
[3]李忠,李春峰,江宏伟,等.管坯电磁胀形的塑性动力分析[J].材料科学与工艺,2004,(6):29-32.

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