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 A General Algorithm for Limit Solutions of Plane Stress Problems H. Huh W. H. Yang  2005.11.29 5353
175 Elasto-Plastic Finite Element Analysis with Directional Reduced Integration in Sheet Metal Forming Process file H. Huh S. S. Han D. Y...  2005.11.29 6112
174 Superplastic Sheet Forming Analysis by the Finite Element Method with Directional Reduced Integration file H. Huh S. S. Han  2005.11.29 5286
173 Experimental Verification of the Superplastic Sheet Metal Forming Analysis by the Finite Element Method file H. Huh S. S. Han J. S...  2005.11.29 4620
172 Rational Finite Element Formulation for a Membrane Element in Sheet Metal Forming Analysis file H. Huh S. S. Han D. Y...  2005.11.29 4857
171 Finite Element Stress Analysis for Design of Optical Fiber Connectors with Elastomeric Ferrules file H. Huh C. H. Lee M. Y...  2005.11.29 5613
170 Collapse Load Calculation for Thick-walled Tubes with Defect by Finite Element Limit Analysis file H. Huh K. S. Lee  2005.11.29 5507
169 Numerical Simulation of Rectangular Cup Drawing Processes with Drawbeads file H. Huh S. S. Han  2005.11.29 5002
168 Load-carrying Capacity of Nuclear Reactors under Internal Pressure considering Work-hardening Effect file H. Huh H. S. Kim H. D...  2005.11.29 5942
167 Parameter Study for Optimum Design of Sheet Metal Forming Processes with Inverse Finite Element Analysis file H. Huh C. H. Lee  2005.11.29 3820
166 Development of CALF for Thermal and Failure Analysis of RPV Lower Head file H. Huh H. S. Kim H. ...  2005.11.29 5763
165 The Effect of Aged Materials on the Autoclave Cure of Thick Composites file E. A. Kempner H. T. H...  2005.11.29 5230
164 Process Parameter Design with Finite Element Analysis in Sheet Metal Forming Processes file S. H. Kim C. H. Lee H...  2005.11.29 4463
163 Collapse Analysis of Space-framed Vehicle Models by Finite Element Limit Analysis file H. S. Kim H. Huh  2005.11.29 4761
162 Identificatoin of Dynamic Behavior of Sheet Metals for an Auto-body with Tension Split Hopkinson Bar file W. J. Kang S. S. Cho ...  2005.11.29 4628
161 Simulation of Three Dimensional Superplastic Blow Forming with a Modified Membrane Finite Element Method file K. S. Lee H. Huh  2005.11.29 4419
160 Estimation of Shape and Non-shape Parameters in Sheet Metal Forming Processes with Inverse Finite Element Analysis file C. H. Lee H. Huh  2005.11.29 4483
159 Thermal and Deformation Analysis for Optimization of the LOM Process with Composite Materials file H. Huh H. T. Hahn  2005.11.29 5319
158 Optimum Process Parameter Determination in Sheet Metal Forming Process file S. H. Kim H. Huh A. T...  2005.11.29 3656
157 Plastic Buckling Simulation of Tubular Structures by Finite Element Limit Analysis file H. Huh H. S. Kim  2005.11.29 4958