저자명 Jongsup Lee, Hoon Huh 
Name 10th USNCCM 
Place  
Year 2009 
This paper is concerned with topology optimization of plastic structures under large deformation using finite element limit analysis. The topology optimization allows designers to get a solution independent of the initial guess enhancing the required structural performances such as stiffness or eigenfrequency of structures. Due to the advantage, the topology optimization has been used in many applications very successfully since its introduction. However, most applications have been limited to optimization of structures with assumption of linear elastic material and finite deformation behavior which are not always valid especially in the cases of compliant design and energy absorption design. It is well known that the structural analysis considering a nonlinear plastic material and large deformation to evaluate the performance measure with respect to the design variation is very time consuming and the computing time of the conventional elasto-plastic analysis is generally dependent on the number of unknowns. Also it is extremely difficult to derive an analytic formulation of the design sensitivity for the objective and cost functions for plastic deformation problems. So, it is very crucial to employ an efficient and alternative structural analysis technique for the optimization to solve those obstacles. The topology optimization of plastic structures, hence, still remains inapplicable except a few ones. Finite element limit analysis could be one of promising solutions for nonlinear topology optimization. Finite element limit analysis predicts sequential collapse modes and collapse loads of a structure considering not only plastic material behavior but also large deformation with moderate computing cost.
In this paper, the optimum topologies of structures under large plastic deformation are obtained using finite element limit analysis. Optimizations are performed to maximize the plastic work under displacement-controlled loadings. The SIMP method and the MMA are employed for parameterization of the design domain and minimization of the objective functional respectively.
Comparisons between elastic design and limit analysis design are made for verification of the proposed optimization algorithm. The load-carry capacity and the stiffness of the optimal solutions by the elastic design and the limit analysis design are investigated. Considering the plastic deformation of the structures leads to different optimal layouts from those based on the elastic design. Results show that the optimization algorithm proposed can obtain the optimal structures which have much higher load-carrying capacity than those by the elastic analysis with comparatively less computing time.
번호 제목 저자명 날짜 조회 수
» TOPOLOGY OPTIMIZATION OF PLASTIC STRUCTURES USING FINITE ELEMENT LIMIT ANALYSIS file Jongsup Lee, Hoon Huh  2009.07.30 8288
175 A Phenomenological energy-based Model for PBX Simulants Considering the Mullins Effect file Kee Sun Yeom Sehwan J...  2013.02.06 8183
174 Compressive Characteristics of PBX Simulant with the Variation of the Strain Rate file Chunghee Park, Sehwan...  2012.09.21 8102
173 Dynamic Failure Characteristics of Electric Resistance Spot Welds in DP Steel Sheets [2] file Jiwoong Ha Hoon Huh J...  2012.12.10 7887
172 Variational Time Integrators for Handling Discontinuous Interfaces in Solids file S. J. Lim S. S. Cho H...  2012.03.20 7197
171 MECHANICAL CHARACTERISTICS OF PBX SIMULANT CONSIDERING STRAIN RATE EFFECT file Chunghee Park Sehwan ...  2011.07.04 7042
170 Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle Kwanghyun Ahn Hoon Hu...  2011.12.22 6918
169 Development of Buffer Stopper Using Progressive Compression Process for Crash Energy Absorption of a Railway Vehicle file Kwanghyun Ahn Hoon Hu...  2012.12.10 6737
168 Effect of helicity on the buckling behavior of single-wall carbon nanotubes file Jeehyang Huh Hoon Huh  2008.12.15 6728
167 Micro-Tensile Tests of Aluminum Thin Foil with the Variation of Strain Rate file J.B. Kwon J. Huh H. H...  2012.06.19 6698
166 Evaluation of Dynamic Hardening Models for Metallic Materials at Wide Range of Strain Rates file Hoon Huh Kwanghyun Ah...  2012.09.26 6678
165 Material Behaviors of PBX Simulant with Various Strain Rates [1] file Chunghee Park Sehwan ...  2013.01.08 6627
164 Quantification of Material Properties of Structural Materials for Warhead at Various Strain Rates file Kwanghyun Ahn Hoon Hu...  2012.09.26 6580
163 Material Properties of PBX Simulant Considering Strain Rate Effect file Chunghee Park Sehwan ...  2010.12.22 6469
162 Ductile fracture of dual phase steel: mechanisms, modeling, prediction and prospective applications file Yanshan Lou, Hoon Huh  2013.02.01 6443
161 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 6383
160 Rate-dependent two-surface model for cyclic hardening behaviour of advanced high strength steel sheets file Jeehyang HUh Hoon Huh...  2012.11.06 6107
159 Effect of the Yield Stress and r-value Distribution on the Earing Profile of Cup Drawing with Yld2000-2d Yield Function file Yanshan Lou Gihyun Ba...  2010.07.14 6069
158 Prediction of forming limit diagrams of DP590 steel based on the M-K model with experimental verification file Yanshan Lou Seokbong ...  2010.12.27 6060
157 Development and investigation of nonlinear shell elements with drilling degree of freedom file H. W. Lee H. Huh  2005.11.29 6007