H. M. Lee, G. H. Yoon, J. Engqvist, M. Ristinmaa and M. Wallin. Mechanism and Machine Theory 195 (2024): 105605. This study considers deployable structures and presents a novel optimization method that aims to improve the stiffness at the fully deployed state. The considered structures consist of curved beams that deploy through buckling when rotated. The optimization ai...
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관리자 2024-03-13 535
T. Y. Ha and G. H. Yoon. Finite Elements in Analysis and Design 235 (2024): 104138. This study examines the phenomenon of intrinsic nature in wave mitigation, specifically focusing on the concept of destructive interference (DI). When waves interact, they can exhibit either destructive interference or constructive interference depending on the phase difference. In the case of mechanica...
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관리자 2024-03-13 528
H. S. Koh and G. H. Yoon. Structural and Multidisciplinary Optimization 67 (3), 33 This paper proposes a novel technique for large-scale partial topology optimization of dynamic engineering structures by utilizing substructuring techniques and repetitive geometry. Partial topology optimization refers to a design domain that only covers a part of the overall ana...
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관리자 2024-03-13 459
L. Long, J. W. Kim and G. H. Yoon. Composite Structures 117859. Vibration isolation is a promise to suppress mechanical vibration from a host structure, similarly, a mechanical vibration absorber, a simple but effective device to attenuate flexural wave propagation, which has been implemented in civil and mechanical engineering. This paper presents a type of composi...
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관리자 2024-03-13 523
H. M. Lee, S. J. Han, M. J. Kim and G. H. Yoon. Smart Materials and Structures 33.3 (2024): 035007. 4D printing has garnered significant attention within the field of engineering due to its capacity to introduce novel functionalities in printed structures through shape-morphing. Nevertheless, there persist challenges in the design and fabrication of intricate struct...
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관리자 2024-03-13 444
R. Zheng, B. Yi, X. Peng and G. H. Yoon. Applied Sciences 14.2 (2024): 657. This paper presents an efficient and compact Matlab code for 2D and 3D topology optimization of multi-materials. We extend a classical 88-line-based educational code to the multi-material problem using the mapping-based interpolation function, with which each material is modeled equally and ...
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관리자 2024-03-13 448
Y. H. Choi and G. H. Yoon. Structural and Multidisciplinary Optimization 66, no. 4 (2023): 91. This paper presents an educational code for topology optimization controlling the trajectory of particle in steady-state laminar fuid. To control the trajectory of particle, fuid motion is optimized by the fuid topology optimization. The one-way forward analysis between fuid and particle and the a...
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관리자 2024-01-15 370
H. S. Koh and G. H. Yoon. Finite Elements in Analysis and Design 227 (2023): 104023. We propose a new Ritz vector-based dynamic substructuring method which substitutes the unit pseudo-forces applied at the adjacent degrees of freedom (DOFs) using distributed forces. One of the main problems of the Ritz vector and unit pseudo-force-based dynamic substructuring method is t...
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관리자 2024-01-15 441
G. H. Yoon and M. K. Kim. Finite Elements in Analysis and Design 225 (2023): 104017. This study introduces a novel topology optimization method for transient two-phase fluid problem with continuous behavior, which remains a challenging task despite advances in computing capabilities. The application of gradient-based optimizer to continuous two-phase fluid systems is com...
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관리자 2024-01-15 386
H. M. Lee, D. Y. Shin, and G. H. Yoon. The International Journal of Advanced Manufacturing Technology (2023): 1-11. This study aims to design a stretchable metasurface system that can adaptively change its wettability using additive manufacturing. The system consists of a stretchable specimen with micro-surface patterns and a bi-layer actuator based on compliant mechanis...
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관리자 2024-01-15 384
D. Y. Kim, E. Park, K. Ku, S. J. Hwang, K.T. Hwang, C. H. Lee, and G. H. Yoon. Journal of the Mechanical Behavior of Biomedical Materials 146 (2023): 106077. This study presents a stacked autoencoder (SAE)-based assessment method which is one of the unsupervised learning schemes for the investigation of bone fracture. Relatively accurate health monitoring of bone fractu...
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관리자 2024-01-15 342
K. Ku, K. E. Silva, and G. H. Yoon. Computers & Structures 286 (2023) 107094. Statistical topology optimization (TO) scheme, which statistically records and analyzes local optima at random frequencies of the excitation force, is developed for material damage and open crack. To identify the alternations of stiffness, mass, and strength due to the damages, the structu...
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관리자 2024-01-15 296
J. H. Kim, Y. H. Choi, and G. H. Yoon. Engineering Optimization 55, no. 9 (2023): 1456-1476. This article develops a new topology optimization scheme for finding optimized joints for multiple components. As the optimized topologies for each component are determined by several structural conditions, simultaneously optimizing the joint location as well as the optimized top...
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관리자 2024-01-15 364
G. H. Yoon, M. Takalloozadeh, and P. Esmailpour. Mechanics Based Design of Structures and Machines 51, no. 9 (2023): 5141-5163. One of the effects of creep phenomena in structures is stress relaxation. Owing to this effect, the stiffness of each point is inversely related to the stress at that point, which causes a stress redistribution, a reduction of the maximum s...
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관리자 2024-01-15 330
H. M. Lee, T. H. Kim, and G. H. Yoon. Computational Particle Mechanics (2023): 1-15. In this study, the penetration behavior of a cone-shaped projectile into granular particles was analyzed using simulations based on the discrete element method (DEM). The rate-independent friction force and inertial drag force proportional to the squared projectile velocity are the princ...
