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박태훈,Park Tae-Hoon 한국국방경영분석학회 1979 한국국방경영분석학회지 Vol.5 No.2
In military applications of equipment, it is of the utmost importance that the equipment operates without breakdown for a specified length of time. We can increase the reliability of a system by adding redundant components to the basic nonredundant system. This study introduces a dynamic programming algorithm of finding optimum redundant design that maximizes the system reliability with constraints.
Layerwise 이론을 이용한 전단변형이 고려된 복합재료보의 유한요소해석
박태훈 ( Park Tae-hoon ),조창근 ( Cho Chang-gun ),박문호 ( Park Moon-ho ),권민호 ( Kwon Min-ho ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
This study developed Finite Element Model using Nonlinear Layerwise Theory which can recognize failure mode like state of stress of laminated composite beam which has different material properties , the fiber failure of laminated composite structure, matrix failure and delamination. This study show good agreement between the Finite Element Model using Nonlinear Layerwise Theory and the three-dimensional elasticity solution. The classical plate theory fails to accurately determine the stress and displacement variation through the thickness, both qualitatively and quantitatively. Note that both the thress-dimensional elasticity theory and Finite Element Model using Nonlinear Layerwise Theory assume that the load is applied at the top surface of the top ply. this gives rise to an unsymmetrical stress distribution through the thickness, as expected. In the conventional beams theorise, however, the load can be applied at the mid-plane only, thereby resulting in equal but opposite stresses at the top and bottom of the beam. Finally, the study identifies the particular types of problems where the layerwise elements possess a clear advantage and superiority over the conventional equivalent single-layer models.