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Advances in Nano Research
  Volume 8, Number 2, February 2020 , pages 149-156

Nonlocal strain gradient effects on forced vibrations of porous FG cylindrical nanoshells
Seyed Sajad Mirjavadi, Masoud Forsat, Alireza Farrokhi Nia, Salman Badnava and A.M.S. Hamouda

    The present paper explores forced vibrational properties of porosity-dependent functionally graded (FG) cylindrical nanoshells exposed to linear-type or triangular-type impulse load via classical shell theory (CST) and nonlocal strain gradient theory (NSGT). Employing such scale-dependent theory, two scale factors accounting for stiffness softening and hardening effects are incorporated in modeling of the nanoshell. Two sorts of porosity distributions called even and uneven have been taken into account. Governing equations obtained for porous nanoshell have been solved through inverse Laplace transforms technique to derive dynamical deflections. It is shown that transient responses of a nanoshell are affected by the form and position of impulse loading, amount of porosities, porosities dispensation, nonlocal and strain gradient factors.
Key Words
    dynamic analysis; transient vibrations; nanoshell; porous FGMs; nonlocal strain gradient theory
(1) Seyed Sajad Mirjavadi, Masoud Forsat, Alireza Farrokhi Nia, A.M.S. Hamouda:
Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;
(2) Salman Badnava:
Department of Computer Science and Engineering, College of Engineering, Qatar University, P.O. Box 2713 Doha, Qatar.

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