저자명 Geunsu Joo, Hoon Huh, Min Kuk Choi 
Journal International Journal of Mechancial Sciences 
Volume 108 
Number  
Pages 174-187 
year 2016 

This paper is concerned with the effect of the strain rate on the tension/compression hardening behavior of auto-body steel sheets. Since the repeated tension and compression prevails in sheet metal forming of deep drawing, accurate material properties under tension/compression loading paths are important to predict deformed shapes of steel sheets with numerical simulation. The in-plane tension/compression tests have not yet been performed for the rate-dependent material properties which are indispensable for practical sheet metal forming simulation. An experimental technique is established to conduct tension/compression tests of DQ and DP590 steel sheets at various strain rates ranging from 0.001 s−1 to 50 s−1. A new clamping device for compression tests is designed to suppress a specimen from thickness-directional buckling with H-shaped clamping plates which are optimized for application of the DIC method. Novel devices to impose a designated tensile strain and compressive strain are also developed for tension/compression tests with the high speed material testing machine at intermediate strain rates. Tension/compression hardening curves are obtained with the variation of the strain rate. It is noted from the test results that the Bauschinger ratio is increased according to the increase of the strain rate. It represents the gradual decrease of the Bauschinger effect with the increase of the strain rate. In a transient period which occurs in loading reversal, the decrease of the tangent modulus appear slowly as the strain rate increases, so that the amount of the permanent softening becomes smaller as the strain rate becomes higher.

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126 Rate-dependent isotropic‒kinematic hardening model in tension‒compression of TRIP and TWIP steel sheets file Geunsu Joo, Hoon Huh  2017.10.11 134
125 Evaluation of the Ductile-to-Brittle Transition Temperature of a silicon steel under various strain rate conditions with a servo-hydraulic high speed testing machine file Junbeom Kwon, Hoon Hu...  2017.06.07 420
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123 Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates file J. Kwon, J. Choi, H. ...  2017.06.07 290
122 Material properties of the nugget zone in resistance spot-welded DP980 steel joint at various strain rates file N. Park, M. Park, J.B...  2017.06.07 350
121 Fracture-based Forming Limit Criteria for Anisotropic Materials in Sheet Metal Forming file N. Park, H. Huh, S.J....  2017.06.07 304
120 Process design of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet file M.K. Choi, H. Huh, an...  2017.06.07 310
119 Fracture modelling of DP780 sheets using a hybrid experimental-numerical method and two-dimensional digital image correlation file Keunhwan Pack, Kwangh...  2015.12.01 1756
118 Tensile Properties of Sheet Metals at Intermediate Strain Rates with Pre-Strain file S. B. Kim and H. Huh  2015.11.18 1413
117 Anisotropy Effect on the Fracture Model of DP980 Sheets Considering the Loading Path file N. PARK, H. HUH, J. B...  2015.06.15 1893
116 Evaluation of dynamic hardening models for BCC, FCC,and HCP metals at a wide range of strain rates Hoon Huh, Kwanghyun A...  2015.02.16 2400
115 Specimen and Grain Size Effects of Al1100 on Strain and Strain Rate Hardening at Various Strain Rates for Al1100 file Junbeom Kwon, Hoon Hu...  2014.08.20 2908
114 Rate-dependent hardening model for polymer-bonded explosives with an HTPB polymer matrix considering a wide range of strain rates file Chunghee Park, Hoon H...  2014.04.11 3910
113 New pseudo-elastic model for polymer-bonded explosive simulants considering the Mullins effect file Kee Sun Yeom Sehwan J...  2013.12.10 4147
112 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.12.10 3602
111 Strain Hardening Model of Pure Titanium Considering Effects of Deformation Twinning file Kwanghyun Ahn, Hoon H...  2013.09.16 4153
110 Prediction of ductile fracture for advanced high strength steel with a new criterion: Experiments and simulation file Yanshan Lou Hoon Huh  2013.04.08 5954
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