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
176 TOPOLOGY OPTIMIZATION OF PLASTIC STRUCTURES USING FINITE ELEMENT LIMIT ANALYSIS file Jongsup Lee, Hoon Huh  2009.07.30 8288
175 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.02.06 8183
174 Compressive Characteristics of PBX Simulant with the Variation of the Strain Rate file Chunghee Park, Sehwan...  2012.09.21 8102
173 Dynamic Failure Characteristics of Electric Resistance Spot Welds in DP Steel Sheets [2] file Jiwoong Ha Hoon Huh J...  2012.12.10 7887
172 Variational Time Integrators for Handling Discontinuous Interfaces in Solids file S. J. Lim S. S. Cho H...  2012.03.20 7197
171 MECHANICAL CHARACTERISTICS OF PBX SIMULANT CONSIDERING STRAIN RATE EFFECT file Chunghee Park Sehwan ...  2011.07.04 7042
170 Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle Kwanghyun Ahn Hoon Hu...  2011.12.22 6918
169 Development of Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle file Kwanghyun Ahn Hoon Hu...  2012.12.10 6737
168 Effect of helicity on the buckling behavior of single-wall carbon nanotubes file Jeehyang Huh Hoon Huh  2008.12.15 6728
167 Micro-Tensile Tests of Aluminum Thin Foil with the Variation of Strain Rate file J.B. Kwon J. Huh H. H...  2012.06.19 6699
166 Evaluation of Dynamic Hardening Models for Metallic Materials at Wide Range of Strain Rates file Hoon Huh Kwanghyun Ah...  2012.09.26 6678
165 Material Behaviors of PBX Simulant with Various Strain Rates [1] file Chunghee Park Sehwan ...  2013.01.08 6627
164 Quantification of Material Properties of Structural Materials for Warhead at Various Strain Rates file Kwanghyun Ahn Hoon Hu...  2012.09.26 6580
163 Material Properties of PBX Simulant Considering Strain Rate Effect file Chunghee Park Sehwan ...  2010.12.22 6469
» Ductile fracture of dual phase steel: mechanisms, modeling, prediction and prospective applications file Yanshan Lou, Hoon Huh  2013.02.01 6444
161 Effect of Strain Rate on the Material Characteristics of a Fragment-Simulating Warhead and an Armor Plate file Jiwoong Ha Hoon Huh K...  2012.06.27 6383
160 Rate-dependent two-surface model for cyclic hardening behaviour of advanced high strength steel sheets file Jeehyang HUh Hoon Huh...  2012.11.06 6107
159 Effect of the Yield Stress and r-value Distribution on the Earing Profile of Cup Drawing with Yld2000-2d Yield Function file Yanshan Lou Gihyun Ba...  2010.07.14 6069
158 Prediction of forming limit diagrams of DP590 steel based on the M-K model with experimental verification file Yanshan Lou Seokbong ...  2010.12.27 6060
157 Development and investigation of nonlinear shell elements with drilling degree of freedom file H. W. Lee H. Huh  2005.11.29 6007