저자명 Yanshan Lou, Hoon Huh 
Name FTF'2012 
Place Zurich, Switzerland 
Year 2012 
The paper is concerned with the mechanism, modelling and numerical prediction of ductile fracture for a dual phase steel sheet of DP980 in a wide stress state at low stress triaxiality in shear and at intermediate stress triaxiality between uniaxial tension and plane strain tension. The mechanism of ductile fracture is investigated based on scanning electronic microscope (SEM) images of fracture surfaces for central hole, in-plane shear and notched specimens, which reveal that voids link up along the direction of the maximum shear stress for all these specimens. Shear linking-up of voids was assumed as the mechanism for void coalescence by a newly proposed micro-mechanism-motivated ductile fracture criterion. This criterion is utilized to construct the fracture locus of DP980 using fracture strains measured from in-plane shear, central hole and plane strain tensile specimens. The constructed fracture locus is implemented into numerical analysis to predict the onset of ductile fracture of these three specimens as well as three types of notched specimens and three shear tensile specimens. The predicted fracture strokes are demonstrated to be close to experimental results with high accuracy from comparison of predicted load-stroke curves with those measured from experiments. High accuracy of the proposed fracture criterion guarantees satisfactory predictability not only in failure prediction for sheet metal forming but also in blanking and cutting.
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 2947
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 3589
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
147 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 4747
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 8901
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
» Ductile fracture of dual phase steel: mechanisms, modeling, prediction and prospective applications file Yanshan Lou, Hoon Huh  2013.02.01 7173
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