Seoul National University · Engineering
Maenghyo Cho 교수의 연구실은 복합재료의 정밀한 거동 해석과 설계를 핵심으로 하며, 고차수 보 이론과 유한요소 해법을 기반으로 한 다층 복합재판의 변형 및 응력 해석 기법을 개발하고 있습니다. 특히, 층간 접합면에서의 전단 응력 연속성과 표면 자유 조건을 만족시키는 정확한 해석 모델링을 통해 인위적 보정 계수 없이도 높은 정확도를 확보합니다. 또한, 리튬이온 및 나트륨이온 배터리의 고체 전극 재료에서의 구조 안정성과 이온 이동 메커니즘을 원자 수준에서 분석하여 고성능 전극 재료의 설계 원리를 제시하고 있습니다. 이와 같은 다학제적 연구는 복합재료의 구조 해석과 에너지 재료의 성능 최적화를 아우르는 핵심 기반을 제공합니다.
Figures are computed from collected data and may differ slightly.
An efficient higher order plate theory for laminated composites is developed. A composite plate theory for general lamination configurations is obtained by superimposing a cubic varying displacement field on a zig-zag linearly varying displacement. The theory has the same number of dependent unknowns as first-order shear deformation theory, and the number of unknowns is independent of the number of layers. The displacement satisfies transverse shear stress continuity conditions at the interface
Our observations indicate that thermodynamically stable and kinetically movable intermediate tetrahedral states of Mn are the main origin of Mn migration, leading to the phase transformation of Li<sub>2</sub>MnO<sub>3</sub>.
The room-temperature shapes of cured unsymmetric composite laminates have out-of-plane warping after autoclave processing. In addition, they exhibit two stable room-temperature configurations due to snap-through phenomena when the side length of laminates exceed a critical value. The cured shape of unsymmetric laminates are influenced by many factors. Experiments show that the effect of tool-plate cannot be ignored and has significant influence on the cured shape. This study examines slippage ef
Recently, the substitution of inactive elements has been reported as a promising strategy for improving the structural stability and electrochemical performance of layered cathode materials for sodium-ion batteries (SIBs). In this regard, we investigated the positive effects of inactive Ti substitution into O3-type NaFe<sub>0.25</sub>Ni<sub>0.25</sub>Mn<sub>0.5</sub>O<sub>2</sub> based on first-principles calculations and electrochemical experiments. After Ti substitution, Na[Ti<sub>0.03</sub>(F
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