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스크램제트 재생냉각시스템의 복합열전달 해석을 위한 무격자 기법 해석자 개발
김재승(J.S. Kim),한다빈(D. Han),허진영(J.Y. Huh),김규홍(K.H. Kim) 한국전산유체공학회 2020 한국전산유체공학회지 Vol.25 No.4
A basic study was conducted to predict the internal thermal environment of an aircraft cruising at hypersonic speed. A numerical solver was developed using a meshless method to analyze the conjugate heat transfer of structures and cooling systems. Developed solver was validated comparing with a few analytic solutions for simple shapes. The solvers result was also verified with that from ABAQUS commercial solver for a 3-dimensional shape. In addition, Analysis of heat transfer including cooling channels confirmed that the heat capacity was preserved over time.
비이차 비등방 항복함수를 이용한 리튬-이온 배터리 파우치의 이방성 및 성형성 예측
김재승(J. S. Kim),문찬미(C. M. Moon),이형림(H.R. Lee),이명규(M. G. Lee) 한국소성·가공학회 2023 소성가공 : 한국소성가공학회지 Vol.32 No.3
This study analyzed the mechanical behavior of lithium-ion battery pouch material and predicted its formability. A homogenization method was used to evaluate the physical properties of the pouch, and a new hardening model was developed. The yield function for the plastic model was optimized, and the anisotropic property was determined. Also, the forming limits were measured and predicted using the M-K forming limit diagram. Finally, a square cup drawing experiment confirmed the accuracy of the measured mechanical properties and the formability calculation.