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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.24 No.2
- 발행연도
- 2017.1
- 수록면
- 151 - 176 (26page)
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This paper deals with general equations of motion for free vibration analysis response of thick three-layer doubly curved sandwich panels (DCSP) under simply supported boundary conditions (BCs) using higher order shear deformation theory. In this model, the face sheets are orthotropic laminated composite that follow the first order shear deformation theory (FSDT) based on Rissners-Mindlin (RM) kinematics field. The core is made of orthotropic material and its in-plane transverse displacements are modeled using the third order of the Taylor's series extension. It provides the potentiality for considering both compressible and incompressible cores. To find these equations and boundary conditions, Hamilton's principle is used. Also, the effect of trapezoidal shape factor for cross-section of curved panel element (1 ± <i>z/R</i>) is considered. The natural frequency parameters of DCSP are obtained using Galerkin Method. Convergence studies are performed with the appropriate formulas in general form for three-layer sandwich plate, cylindrical and spherical shells (both deep and shallow). The influences of core stiffness, ratio of core to face sheets thickness and radii of curvatures are investigated. Finally, for the first time, an optimum range for the core to face sheet stiffness ratio by considering the existence of in-plane stress which significantly affects the natural frequencies of DCSP are presented.
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참고문헌 (43)
참고문헌 신청
Amabili, M. / 2008 / Nonlinear Vibrations and Stability of Shells and Plates / Cambridge University Press
Biglari, H. / 2010 / High-order free vibrations of doubly-curved sandwich panels with flexible core based on a refined three-layered theory / Compos. Struct. 92(11):2685~2694
Bhimaraddi, A. / 1984 / A higher order theory for free vibration analysis of circular cylindrical shells / Int. J. Solids Struct. 20(7):623~630
Ćetković, M. / 2009 / Bending, free vibrations and buckling of laminated composite and sandwich plates using a layerwise displacement model / Compos. Struct. 88(2):219~227
Chang, J. D. / 1992 / Theory of Thick, Laminated Composite Shallow Shells
Biglari, H. / 2010 / High-order free vibrations of doubly-curved sandwich panels with flexible core based on a refined three-layered theory / Compos. Struct. 92(11):2685~2694
Bhimaraddi, A. / 1984 / A higher order theory for free vibration analysis of circular cylindrical shells / Int. J. Solids Struct. 20(7):623~630
Ćetković, M. / 2009 / Bending, free vibrations and buckling of laminated composite and sandwich plates using a layerwise displacement model / Compos. Struct. 88(2):219~227
Chang, J. D. / 1992 / Theory of Thick, Laminated Composite Shallow Shells
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