저자명 Namsu Park, Hoon Huh 
Name Plasticity 2016 conference 
Place Big Island, Hawaii 
Year 2016 

This paper is concerned with modeling of fracture-based forming limit criteria for anisotropic materials in sheet metal forming for prediction of the sudden fracture 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 to demonstrate the anisotropy effect on the equivalent plastic strain at the onset of fracture. For the derivation of a modified Lou−Huh ductile fracture criterion, principal stresses 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. This paper also discusses 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 noted that a polar effective plastic strain-based (PEPS) fracture forming limit diagram (FFLD) is suitable for prediction of the sudden fracture of AHSS sheets in complicated sheet metal forming processes on the basis of its path independence and simplicity of measuring strains in real forming processes.

 
번호 제목 저자명 날짜 조회 수
171 Investigation of the hardening behavior of sheet metals at intermediate strain rates considering the pre-strain M. Kim and H. Huh  2017.06.07 126
170 Tensile properties of a tempered glass plate at the quasi-static state M. Kim, H. Huh, E. Ju...  2017.06.07 71
169 A Method for Evaluation of Tensile Properties of a Nugget Zone in a Spot-Welded Joint Considering the Strain Rate N. Park, M. Park, and...  2017.06.07 67
168 Prediction of the onset of fracture of DP980 steel 1.2t under typical loading conditions based on associated and non-associated flow rules file N. Park and H. Huh  2017.06.07 74
167 Evaluation of tensile properties of heat-treated AISI4340 steel at various strain rates file N. Park, S.J. Lim, an...  2017.06.07 74
166 Prediction of the Ductile-to-Brittle Transition Temperature of a silicon steel under various strain rate conditions file Junbeom Kwon, Hoon Hu...  2017.06.07 70
165 Rate-dependent Material Parameters of the Combined Isotropic/kinematic Hardening Model for the TRIP980 steel sheet file Geunsu Joo, Hoon Huh  2017.06.07 73
164 RATE-DEPENDENT HARDENING BEHAVIORS OF ULTRA-HIGH STRENGTH STEEL SHEETS UNDER IN-PLANE TENSION/COMPRESSION file Hoon Huh, Geunsu Joo  2017.06.07 75
163 ASYMMETRIC MECHANICAL PROPERTIES OF TRIP980 AND TWIP980 STEEL SHEETS AT VARIOUS STRAIN RATES file Geunsu Joo, Hoon Huh  2017.06.07 73
162 AN IMPROVED DEVICE FOR THE TENSION/COMPRESSION TEST AT INTERMEDIATE STRAIN RATES file Geunsu Joo, Hoon Huh  2017.06.07 75
161 Tensile Properties of Auto-body Plastic with Various Strain Rates for FEM by Using The DIC Method and The Force Equilibrium Grid Method file Jesung Yoo, Hoon Huh,...  2017.06.07 76
160 Tensile Properties of Stitched Fabric Composite Manufactured by RTM Considering Various Strain Rates and Stacking Sequences file Jesung Yoo, Hoon Huh,...  2017.06.07 75
159 Efficient coil design by electromagnetic topology optimization for electromagnetic sharp edge forming of DP980 steel sheet file M. K. Choi, H. Huh, M...  2016.05.25 1280
» Fracture-based forming limit criteria for anisotropic materials in sheet metal forming file Namsu Park, Hoon Huh  2016.02.17 1853
157 The tensile properties of CFRP laminate with various stacking sequences considering the strain rate effect at intermediate strain rate file Junbeom Kwon, Hoon Huh  2015.08.08 1552
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 1488
155 Validation of Dynamic Hardening Models With Taylor Impact Tests at High Strain Rates file MingJun Piao, Chunghe...  2015.06.15 1727
154 Roof Structure Design and Evaluation for Improvement of Roof Strength of Three-Wheel Vehicles file Jesung Yoo, Junbeom K...  2015.06.15 1686
153 A Newly Developed Clamping Device for the Tension/compression Test at various Strain Rates file Geunsu JOO, Min Kuk C...  2014.12.23 2324
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 2853