저자명 S. J. Lim S. S. Cho H. Huh K. C. Park 
Name USNCCM 2011 
Place Minneapolis, USA 
Year 2011 
High-fidelity simulation of wave and/or energy packet propagation across transition interfaces, either involving soft-to-hard or hard-to-soft materials, has presented a challenge for the computational community. This paper presents a fresh reexamination of the mechanics of wave propagation across transition interfaces. In doing so, we adopt a class of parameterized time-discontinuous and space continuous variational time integrators [1,2]. Once the governing equations sets with appropriate transition interfaces are discretized both in time and space, an error analysis of the resulting coupled discrete equations is carried out, mainly with focus on the interface mechanics. The error analysis reveals the discretization errors in terms of energy dissipation amount manifested as a violation of symplecticity property, the dispersion error in terms of integration parameters whose values are determined by minimizing the dispersion and phase errors, and balancing between the minimization of the Gibbs spurious oscillations and the dissipation levels across the stress jumps. The parameterized variational integrators thus developed for handling discontinuous
interfaces are evaluated as applied first to one-dimensional wave propagation problem that consists of two vastly differing material properties. While a general applicability of the present integrators for two and three-dimensional problems await further validation tests, the present parameterized variational integrators are shown to adapt to various discontinuous interfaces.
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 7800
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 5189
134 Dynamic Failure Characteristics of Electric Resistance Spot Welds in DP Steel Sheets [2] file Jiwoong Ha Hoon Huh J...  2012.12.10 9034
133 Rate-dependent two-surface model for cyclic hardening behaviour of advanced high strength steel sheets file Jeehyang HUh Hoon Huh...  2012.11.06 7214
132 Quantification of Material Properties of Structural Materials for Warhead at Various Strain Rates file Kwanghyun Ahn Hoon Hu...  2012.09.26 7418
131 Evaluation of Dynamic Hardening Models for Metallic Materials at Wide Range of Strain Rates file Hoon Huh Kwanghyun Ah...  2012.09.26 7481
130 Compressive Characteristics of PBX Simulant with the Variation of the Strain Rate file Chunghee Park, Sehwan...  2012.09.21 8957
129 Pulse Shaping Techniques for Soft Materials in Split Hopkinson Pressure Bar Tests file Chunghee Park Hoon Hu...  2012.07.13 6378
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 7130
127 Dynamic Hardening Equations of Metallic Materials with the Variation of Crystalline Structures file K. Ahn H. Huh L. Park  2012.06.22 5579
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 7539
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 5776
» Variational Time Integrators for Handling Discontinuous Interfaces in Solids file S. J. Lim S. S. Cho H...  2012.03.20 8146
123 Limit dome height prediction based on a new ductile fracture criterion file Yanshan Lou Hoon Huh ...  2012.01.11 5843
122 Formability Prediction of Advanced High Strength Steel with a New Ductile Fracture Criterion file Yanshan Lou Sungjun L...  2012.01.11 5701
121 Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle Kwanghyun Ahn Hoon Hu...  2011.12.22 7701
120 Failure Characteristics of Spot Welds of AHSS under Quasi-static Conditions file J. Ha H. Huh H. Lee K...  2011.12.15 5545
119 Standard Uncertainty Evaluation for Dynamic Tensile Properties of Auto-body Steel Sheets Sehwan Jeong Hoon Hu...  2011.12.13 4976
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 4946
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 5032