저자명 N. Park and H. Huh 
Name 2015 KSTP fall conference 
Year 2015 
page  

This paper is concerned with modeling of a ductile fracture model considering the anisotropy of sheet metal to predict the sudden fracture of advanced high strength steel (AHSS) sheets in complicated forming processes. The Lou−Huh ductile fracture criterion is modified using the Hill’s 48 anisotropic plastic potential instead of the von Mises isotropic plastic potential to take account of the influence of anisotropy on the equivalent plastic strain at the onset of fracture. Two dimensional digital image correlation (2D-DIC) method is utilized to measure the strain histories on the surface of three different types of specimens during deformation. For the derivation of an anisotropic ductile fracture model, principal stresses are expressed in terms of the stress triaxiality, the Lode parameter, and the equivalent stress based on the Hill’s 48 anisotropic plastic potential. It is quantitatively verified that the anisotropic ductile fracture suggested can predict the onset of the fracture over a wide range of loading paths based on the confirmation of damage accumulation, such that it can be utilized for complicated sheet metal forming processes to evaluate the forming limit of advanced high strength steel (AHSS) sheets.

번호 제목 저자명 날짜 조회 수
256 Evaluation of Dynamic Hardening Models With Taylor Impact Tests at Ultra High Strain Rates For 4340 Steel file M. J. Piao, I. Lee, H...  2017.10.11 664
255 Tension/compression Test of Giga-grade Steel Sheets Considering Intermediate Strain Rates file Geunsu Joo, Hoon Huh  2017.06.07 777
254 Evaluation of Measurement Uncertainty of Dynamic Tensile Properties M.K. Choi, H. Choe, H...  2017.06.07 708
253 Evaluation of Tensile Properties of Auto-body Plastics Using DIC Method and Force Equilibrium Grid Method file Jesung Yoo, Park Nams...  2017.06.07 686
» Modeling of a Ductile Fracture Model Considering the Anisotropy of Sheet Metal file N. Park and H. Huh  2015.12.28 2449
251 Evaluation of Dynamic Hardening Models With Taylor Impact Tests at Ultra High Strain Rates For 4340 Steel file M.J. Piao, I. Lee, H....  2015.06.15 2854
250 Prediction of Fracture Strains for DP980 Steel Sheets at a Wide Range of Loading Paths file N. Park, H. Huh  2014.10.29 2900
249 Evaluation of Structural Design for Improvement of the Roof Strength of a Three-Wheel Vehicle file Jesung Yoo, Junbeom K...  2014.07.10 3232
248 Tension/compression Hardening Behavior of Auto-body Steel Sheets at Intermediate Strain Rates file Geunsu Joo, Minkuk Ch...  2014.07.10 3218
247 Prediction of Deformation Behavior of PBX Simulant in a Warhead during High Speed Crash file Namsu Park, Chunghee ...  2014.07.01 3503
246 Tensile Properties of Nugget Region in Spot-welded Joints at Various Strain-Rates file Namsu Park, Moonsu Pa...  2014.07.01 3474
245 Measurement Uncertainty Evaluation of High Speed Tensile Properties of AZ 31 Sheet Considering Correlation file M. K. Choi, H. Huh, C...  2014.06.24 3200
244 Evaluation and Prediction of Tensile Properties of CFRP file Junbeom Kwon, Jaeyoun...  2013.12.27 3865
243 Experimental Investigation of the Effect of the Forming Speed on the Springback Behavior of DP780 Steel Sheets file M. K. Choi, H. Huh  2013.12.27 3392
242 Evaluation of Standard Uncertainty in Modified Measurement of Dynamic Tensile Properties of Auto-body Steel Sheets file Min Kuk Choi, Sehwan ...  2013.12.27 3613
241 The stress softening-effect of polymer-bonded explosive simulant for shear deformation file Kee Sun Yeom Hoon Huh...  2013.12.10 3354
240 User Defined Material Model in LS-DYNA for Numerical Simulations of PBX Simulants file Chunghee Park Hoon Hu...  2013.08.30 5175
239 Fracture strain evaluation of the metallic materials at intermediate strain rates file Sung Jun Lim and Hoon...  2013.08.30 3517
238 Anisotropy Effect on the Fracture Strain of DP980 Sheets [1] file Namsu Park, Sung Jun ...  2013.08.29 3860
237 Evaluation of Ductile Fracture Criteria in Full Stress States file Yanshan Lou, Mingjun...  2013.02.01 5758