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
36 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.02.06 9029
35 Anisotropy Effect on the Fracture Model of DP980 Sheets Considering the Change of Loading Path file Namsu Park, Kwanghyun...  2013.08.29 5930
34 Fracture Evaluation of Metallic Materials at Intermediate Strain Rates file S. J. Lim, K. H. Ahn,...  2013.08.30 5328
33 Effect of Strain Rate on Mechanical Response of PBX Simulant file Chunghee Park, Hoon H...  2013.08.30 4885
32 Measurement Uncertainty Evaluation for High Speed Tensile Properties of Auto-body Steel Sheets file M.K. Choi, S. Jeong, ...  2013.12.27 3922
31 Experimental Investigation on the Springback Behavior of DP780 Steel Sheets with Various Process Parameters file Min Kuk Choi, Hoon Huh  2013.12.27 4689
30 Anisotropy Effect on the Stress-Based Fracture Forming Limit Diagram Using a Modified Lou–Huh Ductile Fracture Criterion file Namsu Park and Hoon Huh  2014.01.20 4898
29 Optimization of Combined Deep Drawing and Electromagnetic Corner Fill Process of DP980 Steel Sheet file M. K. Choi, H. Huh, N...  2014.06.24 3833
28 Prediction of Deformation Behavior of PBX Simulant in a Warhead During High Speed Crash file Namsu Park, Chunghee ...  2014.07.01 3680
27 High Speed Tensile Properties and Measurement Uncertainty of Auto-body Steel Sheets at Intermediate Strain Rates M.K. Choi, S. Jeong, ...  2014.10.07 3517
26 Prediction of Fracture Strains for DP980 Steel Sheets using a Modified Lou-Huh Ductile Fracture Model file Namsu Park, Hoon Huh  2014.10.29 3784
25 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 6530
24 A Newly Developed Clamping Device for the Tension/compression Test at various Strain Rates file Geunsu JOO, Min Kuk C...  2014.12.23 3515
23 Roof Structure Design and Evaluation for Improvement of Roof Strength of Three-Wheel Vehicles file Jesung Yoo, Junbeom K...  2015.06.15 3050
22 Validation of Dynamic Hardening Models With Taylor Impact Tests at High Strain Rates file MingJun Piao, Chunghe...  2015.06.15 3010
21 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 2683
20 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 3059
» Fracture-based forming limit criteria for anisotropic materials in sheet metal forming file Namsu Park, Hoon Huh  2016.02.17 3270
18 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 2763
17 Tensile Properties of Stitched Fabric Composite Manufactured by RTM Considering Various Strain Rates and Stacking Sequences file Jesung Yoo, Hoon Huh,...  2017.06.07 1416