저자명 N. Park and H. Huh 
Name WCCM 12 
Place Korea 
Year 2016 

This paper is concerned with prediction of the onset of fracture of DP980 steel 1.2t under typical loading conditions based on associated and non-associated flow rules to consider the influence of histories in stress path and strain path on the damage accumulation. In general, metallic sheets exhibit a considerable anisotropy due to their crystallographic texture and it significantly affects their deformation behavior when subjected to certain loading conditions. In order to consider the mechanical anisotropic characteristics of the sheet metal during the simulation, the Hill’s 48 quadratic plastic potential was utilized and its material parameters were determined on the basis of the initial Lankford coefficients and/or yield stresses along the orthotropic and diagonal axes of the sheet metals. The LouHuh ductile fracture criterion was employed to evaluate the damage accumulated during the deformation. The coefficients of the LouHuh ductile fracture criterion for DP980 were obtained by evaluating the equivalent plastic strain to the fracture from tensile tests of various shape of specimens which induce typical loading conditions such as pure shear, plane strain tension, and uniaxial tension at the material point where the fracture initiates. Strain measurement were performed by the two-dimensional digital image correlation (2D-DIC) method. In order to perform the fracture simulation based on associated and non-associated flow rules, a vectorized user-defined material subroutine (VUMAT) was developed for commercial finite element code ABAQUS/Explicit.

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 8287
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 6698
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 6468
162 Ductile fracture of dual phase steel: mechanisms, modeling, prediction and prospective applications file Yanshan Lou, Hoon Huh  2013.02.01 6443
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 6382
160 Rate-dependent two-surface model for cyclic hardening behaviour of advanced high strength steel sheets file Jeehyang HUh Hoon Huh...  2012.11.06 6106
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