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김현성(HyunSung Kim),손원식(WonSik Son),황종일(Jongil Hwang),이진규(Jinkyu Lee),임성한(SungHan Rhim) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
This study has conducted a forming analysis to establish design factors optimized for process of backward impact extrusion one-piece molding process. backward impact extrusion and gas bulging were performed, Finite element analysis was carried out assuming rigid-plastic and isotropic materials. In the backward impact extrusion analysis, The effective-stress distribution was higher than the tension test results. However, The materials fluidity was shown by the somewhat low critical damage value. It is expected that the shape completeness will increase if the thickness of the backward impact extrusion product decrease over the high temperature, high pressure and retention time in the gas bulging molding analysis.