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Structural Engineering and Mechanics Volume 68, Number 2, October25 2018 , pages 171-182 DOI: https://doi.org/10.12989/sem.2018.68.2.171 |
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Size-dependent damped vibration and buckling analyses of bidirectional functionally graded solid circular nano-plate with arbitrary thickness variation |
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Abbas Heydari
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| Abstract | ||
| For the first time, nonlocal damped vibration and buckling analyses of arbitrary tapered bidirectional functionally graded solid circular nano-plate (BDFGSCNP) are presented by employing modified spectral Ritz method. The energy method based on Love-Kirchhoff plate theory assumptions is applied to derive neutral equilibrium equation. The Eringen\'s nonlocal continuum theory is taken into account to capture small-scale effects. The characteristic equations and corresponding first mode shapes are calculated by using a novel modified basis in spectral Ritz method. The modified basis is in terms of orthogonal shifted Chebyshev polynomials of the first kind to avoid employing adhesive functions in the spectral Ritz method. The fast convergence and compatibility with various conditions are advantages of the modified spectral Ritz method. A more accurate multivariable function is used to model two-directional variations of elasticity modulus and mass density. The effects of nanoscale, in-plane pre-load, distributed dashpot, arbitrary tapering, pinned and clamped boundary conditions on natural frequencies and buckling loads are investigated. Observing an excellent agreement between results of current work and outcomes of previously published works in literature, indicates the results\' accuracy in current work. | ||
| Key Words | ||
| non-local continuum mechanics; damped vibration; buckling; bidirectional functionally graded material; circular nano-plate; arbitrary thickness variation | ||
| Address | ||
| Abbas Heydari: Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University, Ardabil, Iran | ||