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Steel and Composite Structures
  Volume 34, Number 5, March10 2020 , pages 657-670
DOI: https://doi.org/10.12989/scs.2020.34.5.657
 


Three dimensional free vibration analysis of functionally graded nano cylindrical shell considering thickness stretching effect
Maryam Lori Dehsaraji, Mohammad Arefi and Abbas Loghman

 
Abstract
    In this paper, vibration analysis of functionally graded nanoshell is studied based on the sinusoidal higher-order shear and normal deformation theory to account thickness stretching effect. To account size-dependency, Eringen nonlocal elasticity theory is used. For more accurate modeling the problem and corresponding numerical results, sinusoidal higher-order shear and normal deformation theory including out of plane normal strain is employed in this paper. The radial displacement is decomposed into three terms to show variation along the thickness direction. Governing differential equations of motion are derived using Hamilton\'s principle. It is assumed that the cylindrical shell is made of an arbitrary composition of metal and ceramic in which the local material properties are measured based on power law distribution. To justify trueness and necessity of this work, a comprehensive comparison with some lower order and lower dimension works and also some 3D works is presented. After presentation of comparative study, full numerical results are presented in terms of significant parameters of the problem such as small scale parameter, length to radius ratio, thickness to radius ratio, and number of modes.
 
Key Words
     thickness stretching effect; shear and normal deformation theory; free vibration analysis; length scale parameter; nonlocal theory
 
Address
Maryam Lori Dehsaraji, Mohammad Arefi and Abbas Loghman: Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran
 

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