Steel and Composite Structures

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Nonlocal-integro-vibro analysis of vertically aligned monolayered nonuniform FGM nanorods

  • Yuan, Yuan (School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology) ;
  • Zhao, Ke (School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology) ;
  • Zhao, Yafei (School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology) ;
  • Kiani, Keivan (Department of Civil Engineering, K.N. Toosi University of Technology)
  • Received : 2019.09.06
  • Accepted : 2020.10.13
  • Published : 2020.12.10
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Abstract

Vibration of vertically aligned-monolayered-nonuniform nanorods consist of functionally graded materials with elastic supports has not been investigated yet. To fill this gap, the problem is examined using the elasticity theories of Eringen and Gurtin-Murdoch. The geometrical and mechanical properties of the surface layer and the bulk are allowed to vary arbitrarily across the length. The nonlocal-surface energy-based governing equations are established using differential-type and integro-type formulations, and solved by employing the Galerkin method by exploiting admissible modes approach and element-free Galerkin (EFG). Through various comparison studies, the effectiveness of the EFG in capturing both nonlocal-differential/integro-based frequencies is proved. A constructive parametric study is also conducted, and the roles of nanorods' diameter, length, stiffness of both inter-rod's elastic layer and elastic supports, power-law index of both constituent materials and geometry, nonlocal and surface effects on the dominant frequencies are revealed.

Keywords

Acknowledgement

Dedicated to the honorable memory of my beloved mother, Kobra Ahmadi (1950-July 21, 2020).

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