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
96 Front Side Member Crash Analyses Considering Dynamic Failure of a Spot Weld file Jiwoong Ha, Jung-Han...  2009.07.31 4945
» TOPOLOGY OPTIMIZATION OF PLASTIC STRUCTURES USING FINITE ELEMENT LIMIT ANALYSIS file Jongsup Lee, Hoon Huh  2009.07.30 8318
94 A Time-Discontinuous Variational Integrator of Hamiltonian for Conservative Mechanical System file Sang Soon Cho, Hoon ...  2009.07.30 4088
93 Membrane Rebar Element considering Rotation of Reinforced Fibers for an Air Spring file Sehwan Jeong, Hoon H...  2009.07.30 4371
92 Parameter Study of the Roller Straightening Process of Steel Cords Using Finite Element Analysis file Gihyun Bae, Jongsup ...  2009.07.27 3960
91 Reliability based design optimization for crashworthiness of a spot welded hat type member file Y.J.Kim H.Huh  2009.06.29 3767
90 Minimization of Residual Stress of the Steel Cord for the Tire-reinforcement Using Finite Element Analysis file JongSup Lee, Hoon Hu...  2008.12.15 3826
89 Regression Model for Light Weight and Crashworthiness Enhancement Design of Automotive Parts in Frontal Car Crash file GIHYUN BAE, HOON HUH  2008.12.15 3914
88 Simulation-based Prediction Model of Draw-bead Restraining Force and Normal Force file G.H. Bae, H. Huh, S...  2008.12.15 3805
87 ENERGY ABSORPTION OF EXPANSION TUBE CONSIDERING LOCAL BUCKLING CHARACTERISTICS file K.H. Ahn, J.S. Kim ...  2008.12.15 5065
86 CRASHWORTHINESS DESIGN OF THE SHEAR BOLTS FOR LIGHT COLLISION SAFETY DEVICES file J.S. Kim, H. Huh T....  2008.12.15 3809
85 Crash Tests of Tension Bolts in Light Safety Collision Devices file J.S. Kim, H. Huh T....  2008.12.15 4269
84 Effect of helicity on the buckling behavior of single-wall carbon nanotubes file Jeehyang Huh Hoon Huh  2008.12.15 6758
83 ANALYSIS OF ELASTO-PLASTIC STRESS WAVES BY A TIME-DISCONTINUOUS VARIATIONAL INTEGRATOR OF HAMILTONIAN file S. S. Cho, H. Huh K...  2008.12.15 4275
82 Evaluation of the Failure Elongation of Steel Sheets for an Auto-body at the Intermediate Strain Rate file S. B. Kim H. Huh  2008.12.15 3881
81 Design of the Cross Section Shape of an Aluminum Crash Box for Crashworthiness Enhancement of a Car file S. B. Kim, H. Huh, ...  2008.12.15 4626
80 DYNAMIC MATERIAL PROPERTIES OF THE HEAT-AFFECTED ZONE (HAZ) IN RESISTANCE SPOT WELDING file JI-WOONG HA, JUNG-HA...  2008.12.14 3542
79 The Effects of Local Buckling on the Crash Energy Absorption of Thin-walled Expansion Tubes file Kwanghyun Ahn Jin Su...  2008.10.17 3800
78 Bending History in Finite Element Inverse Analysis of Deep Drawing Processes file Jeehyang Huh Jonghun ...  2008.09.16 3775
77 Failure Elongation of Steel Sheets for an Auto-body at the High Strain Rate file H. Huh S. B. Kim J. H...  2008.08.18 3759