저자명 J. S. Lee H. Huh 
Name proc. KSTP Spring Conference 
Year 2004 
page 131-134 

  the hub hole is usually formed with a stretch flanging process followed by a blanking process of a hole. Since the hole is made by blanking, the blanked surface is so rough that the formability in the region is rather poor. The emerging task is to identify the formability of the blanked region in the forming simulation and to relate the criterion to the real forming process by experiments. In this paper, the blanked region of a hole surface is modeled by a defected-edge finite element for stretch flanging simulation. The analysis deals with the level of defect in the blanked region in order to identify the formability in the real process. The analysis provides the formability depending on the level of defect and seeks the way to match the level of defect to that of the real surface. The approach makes the analysis possible to deal with the formability of the high strength steel and predict the fracture at the hole surface during the stretch flanging simulation.

번호 제목 저자명 날짜 조회 수
256 Dynamic Hardening Equation for Metallic Materials with the Variation of Crystalline Structures file Kwanghyun Ahn Hoon Hu...  2012.06.07 8921
255 Effect of the Measurement Uncertaintty of Dynamic Tensile Properties on Dynamic Buckling Analysis of a Circular Tube file Sehwan Jeong Hoon Huh  2012.08.06 8366
254 Evolution of yield surface of SPCC steel sheet at different strain rates file Jeehyang Huh Hoon Huh  2012.05.29 7906
253 Investigation of springback behavior of DP780 steel sheets [1] file M.K.Choi H.Huh  2012.06.08 7483
252 Evaluation of Ductile Fracture Criteria in Full Stress States file Yanshan Lou, Mingjun...  2013.02.01 6760
251 A New Tangent Stiffness for Anisotropic Elasto-Viscoplastic Analysis of Polycrystalline Deformations file J. H. Yoon H. Huh Y. ...  2006.12.11 6501
250 User Defined Material Model in LS-DYNA for Numerical Simulations of PBX Simulants file Chunghee Park Hoon Hu...  2013.08.30 6346
249 Effect of Tensile Speed on the Failure Load of Laser Welding under Combined Loading Conditions [2] file Jiwoong Ha Hoon Huh S...  2012.06.27 6332
» Prediction of fracture in a hub-hole expansion with a defected-edge model file J. S. Lee H. Huh  2005.11.29 6140
247 Dynamic Material Properties of an Armor Plate Material for an Armored Vehicle file Jiwoong Ha Kwanghyun ...  2012.06.27 6135
246 Characteristics Analysis of the High Performance Damper-Strut Module file Youn-Ki Ko Jung-Han S...  2006.06.14 6113
245 Effect of Deformation Twinning on Strain Hardening in Titanium file Kwanghyun Ahn Hoon Hu...  2012.06.04 5819
244 Application of Ductile Fracture Criteria for the FLD Prediction of Steel Sheets file Yanshan Lou Soekbong ...  2010.12.27 5761
243 Development of Braking System for Railway Vehicle Using Progressive Compression Process file Kwanghyun Ahn Youn Ki...  2011.12.15 5701
242 Forming Limit Diagram of Advanced High Strength Steel Sheets for High-Speed Sheet Metal Forming file S. J. Lim, S. B. Kim...  2012.05.29 5681
241 Quasi-Static Failure of Spot Welds of AHSS under Combined Loading Conditions file Jiwoong Ha Hoon Huh H...  2011.04.01 5678
240 Finite Element Stress Analysis of the Tire Contact Problem file H. Huh Y. K. Kwak Y. ...  2005.11.29 5619
239 Railway Buffer Stop Using Progressive Compression Process file Kwanghyun Ahn Youn Ki...  2010.12.24 5371
238 Anisotropy Effect on the Fracture Strain of DP980 Sheets [1] file Namsu Park, Sung Jun ...  2013.08.29 5329
237 Microscopic Investigation of the Strain Rate Hardening for Metals file J. H. Yoon H. Huh C. ...  2007.10.14 5316