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This and the next image are from:
Hassan Zafamand (1), Manouchehr Salehi (2) and Kamran Asemi (3)
(1) Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
(2) Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran.
(3) Mechanical Engineering Department, Islamic Azad University, Tehran North Branch, Iran
“Three dimensional free vibration and transient analysis of two directional functionally graded thick cylindrical panels under impact loading”, Latin American Journal of Solids and Structures, Vol. 12, pp 205-225, 2015, DOI: 10.1590/1679-78251099
ABSTRACT: In this paper three dimensional free vibration and transient response of a cylindrical panel made of two directional functionally graded materials (2D-FGMs) based on three dimensional equations of elasticity and subjected to internal impact loading is considered. Material properties vary through both radial and axial directions continuously. The 3D graded finite element method (GFEM) based on Rayleigh-Ritz energy formulation and Newmark direct integration method has been applied to solve the equations in space and time domains. The fundamental normalized natural frequency, time history of displacements and stresses in three directions and velocity of radial stress wave propagation for various values of span angle of cylindrical panel and different power law exponents have been investigated. The present results show that using 2D-FGMs leads to a more flexible design than conventional 1D-FGMs. The GFEM solution have been compared with the results of an FG thick hollow cylinder and an FG curved panel, where a good agreement between them is observed.
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