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Bending spring back analysis of U-shape stamping part based on JSATMP/NV

LI Yanbo1,LIU Rongfeng2,LIU Hongwu1(1.Institute of Industry Technology,Guangzhou & Chinese Academy of Sciences,Guangzhou 511458,China; 2.JSOL Co.,Tokyo 460-002,Japan)  
The main functions of JSTAMP/NV and YOSHIDA-UEMORI model(Y-U model) are introduced.Taking the examination question about effect of pre-strain on bending spring back of U-shape stamping part as an example,which is proposed on the international conference and workshop on numerical simulation of 3D sheet metal forming processes(Numisheet'2011),the application of JSTAMP/NV in bending and spring back simulation process with pre-strain and without pre-strain is introduced,the spring back simulation results are compared with the experiment results,and it shows that they are consistent quite well.At last,the new functions of new version 2.6 of JSTAMP/NV are briefly introduced.
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