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Layerwise 이론을 이용한 전단변형이 고려된 복합재료보의 유한요소해석
박태훈(Park, Tae-Hoon),조창근(Cho, Chang-Gun),박문호(Park Moon-Ho),권민호(Kwon Min-Ho) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 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
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.