Abstract
In this research paper, the free vibration of a functionally graded porous (FGP) cylindrical shell is numerically examined. It is assumed that the modulus of elasticity of the porous composite is graded in the thickness direction. Material properties are defined according to the coordinates points in a user defined material UMAT subroutine implemented with the commercial code ABAQUS / Standard. First order-shear deformation theory (FSDT) is employed for analyzing the free vibration of cylindrical shell. Two types of porosity distribution (Even and Uneven types) are considered in the present work. This study examined the effect of material gradient index, porosity arrangements and porosity coefficient of free vibration characteristics of functionally graded porous (FGP) cylindrical shell. The numerical simulation illustrates very close results to solutions in the literature, assessing the accuracy and the effectiveness of the actual implementation. The proposed solution procedure is significantly efficient from the computational point of view.
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