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《Forging & Stamping Technology》 2011-01
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Influences of conditions at tube-blank end on viscous medium outer pressure necking of thin-wall parts

GAO Tie-jun1,LIU Zhan-jun1,WANG Zhong-jin(1.School of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;2.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)  
Influences of the conditions at tube-blank end on viscous medium outer necking of thin-wall parts were analyzed by theoretical method and finite element method.Then the buckling pressure as well as the shape change of the tube-blank and the rule of its wall thickness distribution after wrinkling,under the condition of the end fixed and free were obtained.Results show that the end condition of tube-blank makes an impact on the forming quality of the viscous medium outer pressure necking of thin-wall parts.Restraining the end of the tube-blank and limiting the material flow can not only give rise to the buckling pressure,but also help to eliminate the wrinkles and increase the necking limit.
【Fund】: 辽宁省教育厅(2009A577);; 航空基金(2009ZA54006)
【CateGory Index】: TB301
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