저자명 M.K. Choi, H. Huh, and N. Park 
Journal Journal of Materials Processing Technology 
Volume 244 
Number  
Pages 331-343 
year 2017 
This paper introduces combined deep drawing and electromagnetic sharp edge forming to improve the formability of advanced high strength steels. It includes a feasibility study of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet with a thickness of 1.2 mm. A feasible approach of the combined forming process is investigated with numerical analysis which consists of pre-forming and electromagnetic sharp edge forming using the pre-formed sheet. Pre-forming analyses are conducted to check the formability of the material by utilizing a fracture forming limit diagram developed. Then electromagnetic forming is applied to the pre-formed workpiece to obtain a sharp edge that fails to format the conventional pre-forming. In electromagnetic sharp edge forming, process parameters related to the forming force are optimized so that the desired shape is formed as close as possible. The optimization of the forming force is carried out satisfying the objective function and constraint functions established to minimize the deviation of a deformed shape from the desired shape without exceeding the forming limits. In order to induce the optimized forming force, the electromagnetic tool coil is designed with topology optimization. A new electromagnetic topology optimization formulation is developed for the design of an efficient tool coil. Numerical results and conclusions demonstrate the applicability of this combined forming process.
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128 Characterization of Hardening Behaviors of 4130 Steel, OFHC Copper, Ti6Al4V Alloy Considering Ultra-High Strain Rates and high Temperatures file M. Piao, H. Huh, I. L...  2017.10.11 83
127 Characterization of flow stress at ultra-high strain rates by proper extrapolation with Taylor impact tests file M. Piao, H. Huh, I. L...  2017.10.11 75
126 Rate-dependent isotropic‒kinematic hardening model in tension‒compression of TRIP and TWIP steel sheets file Geunsu Joo, Hoon Huh  2017.10.11 76
125 Evaluation of the Ductile-to-Brittle Transition Temperature of a silicon steel under various strain rate conditions with a servo-hydraulic high speed testing machine file Junbeom Kwon, Hoon Hu...  2017.06.07 346
124 Tension/compression hardening behaviors of auto-body steel sheets at intermediate strain rates file Geunsu Joo, Hoon Huh,...  2017.06.07 269
123 Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates file J. Kwon, J. Choi, H. ...  2017.06.07 230
122 Material properties of the nugget zone in resistance spot-welded DP980 steel joint at various strain rates file N. Park, M. Park, J.B...  2017.06.07 272
121 Fracture-based Forming Limit Criteria for Anisotropic Materials in Sheet Metal Forming file N. Park, H. Huh, S.J....  2017.06.07 236
» Process design of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet file M.K. Choi, H. Huh, an...  2017.06.07 236
119 Fracture modelling of DP780 sheets using a hybrid experimental-numerical method and two-dimensional digital image correlation file Keunhwan Pack, Kwangh...  2015.12.01 1687
118 Tensile Properties of Sheet Metals at Intermediate Strain Rates with Pre-Strain file S. B. Kim and H. Huh  2015.11.18 1340
117 Anisotropy Effect on the Fracture Model of DP980 Sheets Considering the Loading Path file N. PARK, H. HUH, J. B...  2015.06.15 1822
116 Evaluation of dynamic hardening models for BCC, FCC,and HCP metals at a wide range of strain rates Hoon Huh, Kwanghyun A...  2015.02.16 2329
115 Specimen and Grain Size Effects of Al1100 on Strain and Strain Rate Hardening at Various Strain Rates for Al1100 file Junbeom Kwon, Hoon Hu...  2014.08.20 2848
114 Rate-dependent hardening model for polymer-bonded explosives with an HTPB polymer matrix considering a wide range of strain rates file Chunghee Park, Hoon H...  2014.04.11 3821
113 New pseudo-elastic model for polymer-bonded explosive simulants considering the Mullins effect file Kee Sun Yeom Sehwan J...  2013.12.10 4083
112 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.12.10 3521
111 Strain Hardening Model of Pure Titanium Considering Effects of Deformation Twinning file Kwanghyun Ahn, Hoon H...  2013.09.16 4070
110 Prediction of ductile fracture for advanced high strength steel with a new criterion: Experiments and simulation file Yanshan Lou Hoon Huh  2013.04.08 5872
109 Effect of strain rate on plastic anisotropy of advanced high strength steel sheets file Jeehyang Huh Hoon Huh...  2013.04.02 3874