저자명 N. Park, H. Huh, S.J. Lim, Y. Lou, Y.S. Kang, and M.H. Seo 
Journal International Journal of Plasticity 
Volume  
Number  
Pages 1-35 
year 2016 
This paper is concerned with modeling of fracture-based forming limit criteria for anisotropic materials in sheet metal forming to predict the sudden fracture in complicated forming processes. The LoueHuh ductile fracture criterion is modified using the Hill's 48 anisotropic yield function instead of the von Mises isotropic yield function to take account of the influence of anisotropy on the equivalent plastic strain at the onset of fracture. For the derivation of an anisotropic ductile fracture criterion, the principal stresses (s1,s2,s3) are expressed in terms of the stress triaxiality, the Lode parameter, and the equivalent stress based on the Hill's 48 yield function. Three different kinds of fracture based forming limit criteria are suggested and investigated with an assumption that the stress state is under the plane stress condition with proportional loading. To determine the parameters of the model proposed, the two-dimensional digital image correlation (2DDIC) method is utilized to measure the strain histories on the surface of three different types of specimens during deformation and the measurement results are investigated to identify the anisotropy effect on the equivalent plastic strain at the onset of fracture. This paper also discusses about a scaling method for a strain-based fracture forming limit criterion in order to capture the onset of fracture using a single forming limit curve for an anisotropic material. From the comparison of various forming limit criteria suggested, it is concluded that a polar effective plastic strain-based (PEPS) fracture forming limit diagram (FFLD) is suitable for prediction of the sudden fracture in AHSS sheets in complicated sheet metal forming processes on the basis of its path independence and simplicity of measuring strains in real forming processes.
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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...  2017.06.07 420
124 Tension/compression hardening behaviors of auto-body steel sheets at intermediate strain rates file Geunsu Joo, Hoon Huh,...  2017.06.07 339
123 Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates file J. Kwon, J. Choi, H. ...  2017.06.07 290
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...  2017.06.07 350
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120 Process design of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet file M.K. Choi, H. Huh, an...  2017.06.07 310
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118 Tensile Properties of Sheet Metals at Intermediate Strain Rates with Pre-Strain file S. B. Kim and H. Huh  2015.11.18 1413
117 Anisotropy Effect on the Fracture Model of DP980 Sheets Considering the Loading Path file N. PARK, H. HUH, J. B...  2015.06.15 1893
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 2400
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 2908
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 3910
113 New pseudo-elastic model for polymer-bonded explosive simulants considering the Mullins effect file Kee Sun Yeom Sehwan J...  2013.12.10 4147
112 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.12.10 3602
111 Strain Hardening Model of Pure Titanium Considering Effects of Deformation Twinning file Kwanghyun Ahn, Hoon H...  2013.09.16 4153
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