저자명 Kwanghyun Ahn Hoon Huh Lee Ju Park 
Name KISHEM 
Place Incheon, Korea 
Year 2012 
This paper is concerned with the suggestion of the best dynamic hardening equation that is capable of quantifying the dynamic hardening properties of metallic materials for warhead. The dynamic response of metallic materials is indispensable for analysis of high speed condition. There is, however, no unique equation that is capable of representing the dynamic hardening characteristics of all kinds of materials although various dynamic hardening equations have been suggested by many researchers. Dynamic hardening equations reported and proposed have been investigated using the dynamic hardening characteristics of three kinds of representative materials for warhead: 4340Steel (BCC); OFHC (FCC); and Ti6Al4V (HCP). Three kinds of materials which have different crystalline structures were chosen to investigate the dynamic hardening characteristics with the variation of crystalline structure. Dynamic hardening characteristics of each material have been obtained by uniaxial tensile tests and SHPB tests. Uniaxial tensile tests have been performed with the variation of the strain rate from 0.001/sec to 100/sec and SHPB tests have been conducted at the strain rate ranging up to 4000/sec. Several existing models have been constructed and evaluated for Johnson-Cook model, Zerilli-Armstrong model, and Preston-Tonks-Wallace model using test results of three materials. Several proposed models by KAIST have been also evaluated for modified Johnson-Cook model, modified Khan-Huang model, and Lim-Huh model. The change of the strain rate and temperature during the deformation process were investigated for accurate application of hardening equations. The most applicable equation for each material has been suggested by comparison of constructed results.
번호 제목 저자명 날짜 조회 수
136 Development of Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle file Kwanghyun Ahn Hoon Hu...  2012.12.10 7284
135 Effect of Tensile Speed on the Failure Load of Laser Welding under Combined Loading Conditions file Jiwoong Ha Hoon Huh K...  2012.12.10 4863
134 Dynamic Failure Characteristics of Electric Resistance Spot Welds in DP Steel Sheets [2] file Jiwoong Ha Hoon Huh J...  2012.12.10 8455
133 Rate-dependent two-surface model for cyclic hardening behaviour of advanced high strength steel sheets file Jeehyang HUh Hoon Huh...  2012.11.06 6627
» Quantification of Material Properties of Structural Materials for Warhead at Various Strain Rates file Kwanghyun Ahn Hoon Hu...  2012.09.26 7010
131 Evaluation of Dynamic Hardening Models for Metallic Materials at Wide Range of Strain Rates file Hoon Huh Kwanghyun Ah...  2012.09.26 7031
130 Compressive Characteristics of PBX Simulant with the Variation of the Strain Rate file Chunghee Park, Sehwan...  2012.09.21 8504
129 Pulse Shaping Techniques for Soft Materials in Split Hopkinson Pressure Bar Tests file Chunghee Park Hoon Hu...  2012.07.13 5892
128 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 6700
127 Dynamic Hardening Equations of Metallic Materials with the Variation of Crystalline Structures file K. Ahn H. Huh L. Park  2012.06.22 5218
126 Micro-Tensile Tests of Aluminum Thin Foil with the Variation of Strain Rate file J.B. Kwon J. Huh H. H...  2012.06.19 7122
125 Comparison of Dynamic Hardening Equations for Metallic Materials with the Variation of Crystalline Structures file K. Ahn H. Huh L. Park  2012.05.07 5405
124 Variational Time Integrators for Handling Discontinuous Interfaces in Solids file S. J. Lim S. S. Cho H...  2012.03.20 7692
123 Limit dome height prediction based on a new ductile fracture criterion file Yanshan Lou Hoon Huh ...  2012.01.11 5523
122 Formability Prediction of Advanced High Strength Steel with a New Ductile Fracture Criterion file Yanshan Lou Sungjun L...  2012.01.11 5248
121 Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle Kwanghyun Ahn Hoon Hu...  2011.12.22 7271
120 Failure Characteristics of Spot Welds of AHSS under Quasi-static Conditions file J. Ha H. Huh H. Lee K...  2011.12.15 5171
119 Standard Uncertainty Evaluation for Dynamic Tensile Properties of Auto-body Steel Sheets Sehwan Jeong Hoon Hu...  2011.12.13 4656
118 A Method For Treating Temporal And Spatial High Gradient Phenomena In The Dynamics Of Solids K.C. Park S.j. Lim H....  2011.08.03 4582
117 Cyclic tension/compression test of auto-bod steel sheets with the variation of the strain rate file G. H. Bae H. Huh  2011.07.04 4693