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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.
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.