저자명 Namsu Park and Hoon Huh 
Name NUMISHEET 2014 
Place Melbourne, Australia 
Year Jan 6~10, 2014 
This paper is concerned with the anisotropy effect on the stress-based fracture forming limit diagram using a modified Lou–Huh ductile fracture criterion. In sheet metal forming process, a usage of advanced high-strength steels (AHSSs) has been remarkably increasing for the lightweight car body and good formability. It is, however, unable to evaluate the formability of AHSS with the conventional forming limit diagram during complex forming processes since it is obtained by assuming the proportional loading path and AHSS shows sudden fracture involving little amount of necking. The stress-based fracture forming limit diagram was constructed using a modified Lou–Huh ductile fracture criterion in order to evaluate the formability of AHSS accurately. The anisotropy effect on the fracture strain is also evaluated to reflect the material behavior of sheet metals in constructing the criterion for the prediction of onset of the fracture. The constructed stress-based fracture forming limit diagrams deal with the stress state ranging from pure shear to equi-biaxial tension with the variation of orientation of sheet metals. It is clearly observed that the stress-based fracture forming limit diagrams are varied with the change of orientation of sheet metals.
번호 제목 저자명 날짜 조회 수
156 An improved technique for reducing the load ringing phenomenon in tensile tests at high strain rates file J.B. Kwon, H.Huh, C.N...  2015.08.08 2592
155 Validation of Dynamic Hardening Models With Taylor Impact Tests at High Strain Rates file MingJun Piao, Chunghe...  2015.06.15 2895
154 Roof Structure Design and Evaluation for Improvement of Roof Strength of Three-Wheel Vehicles file Jesung Yoo, Junbeom K...  2015.06.15 2946
153 A Newly Developed Clamping Device for the Tension/compression Test at various Strain Rates file Geunsu JOO, Min Kuk C...  2014.12.23 3427
152 Effect of punch speed on the amount of springback in U-bending process of auto-body steel sheets Min Kuk Choi, Hoon Huh  2014.10.30 6346
151 Prediction of Fracture Strains for DP980 Steel Sheets using a Modified Lou-Huh Ductile Fracture Model file Namsu Park, Hoon Huh  2014.10.29 3668
150 High Speed Tensile Properties and Measurement Uncertainty of Auto-body Steel Sheets at Intermediate Strain Rates M.K. Choi, S. Jeong, ...  2014.10.07 3434
149 Prediction of Deformation Behavior of PBX Simulant in a Warhead During High Speed Crash file Namsu Park, Chunghee ...  2014.07.01 3588
148 Optimization of Combined Deep Drawing and Electromagnetic Corner Fill Process of DP980 Steel Sheet file M. K. Choi, H. Huh, N...  2014.06.24 3751
» Anisotropy Effect on the Stress-Based Fracture Forming Limit Diagram Using a Modified Lou–Huh Ductile Fracture Criterion file Namsu Park and Hoon Huh  2014.01.20 4746
146 Experimental Investigation on the Springback Behavior of DP780 Steel Sheets with Various Process Parameters file Min Kuk Choi, Hoon Huh  2013.12.27 4536
145 Measurement Uncertainty Evaluation for High Speed Tensile Properties of Auto-body Steel Sheets file M.K. Choi, S. Jeong, ...  2013.12.27 3843
144 Effect of Strain Rate on Mechanical Response of PBX Simulant file Chunghee Park, Hoon H...  2013.08.30 4755
143 Fracture Evaluation of Metallic Materials at Intermediate Strain Rates file S. J. Lim, K. H. Ahn,...  2013.08.30 5202
142 Anisotropy Effect on the Fracture Model of DP980 Sheets Considering the Change of Loading Path file Namsu Park, Kwanghyun...  2013.08.29 5862
141 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.02.06 8900
140 Fracture modeling of DP780 sheets using a hybrid experimental‒numerical method and two‐dimensional digital image correlation file Keunhwan Pack Kwanghy...  2013.02.06 6209
139 Ductile fracture of dual phase steel: mechanisms, modeling, prediction and prospective applications file Yanshan Lou, Hoon Huh  2013.02.01 7172
138 Material Behaviors of PBX Simulant with Various Strain Rates [1] file Chunghee Park Sehwan ...  2013.01.08 7470
137 Dynamic Hardening Equation of Nickel-based Superalloy Inconel 718 file Kwanghyun Ahn Hoon Huh  2012.12.10 5877