Advances in nano research

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Size dependent torsional vibration of a rotationally restrained circular FG nanorod via strain gradient nonlocal elasticity

  • Busra Uzun (Bursa Uludag University, Faculty of Engineering, Department of Civil Engineering) ;
  • Omer Civalek (Akdeniz University, Faculty of Engineering, Department of Civil Engineering) ;
  • M. Ozgur Yayli (Bursa Uludag University, Faculty of Engineering, Department of Civil Engineering)
  • Received : 2022.06.09
  • Accepted : 2023.12.05
  • Published : 2024.02.25
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Abstract

Dynamical behaviors of one-dimensional (1D) nano-sized structures are of great importance in nanotechnology applications. Therefore, the torsional dynamic response of functionally graded nanorods which could be used to model the nano electromechanical systems or micro electromechanical systems with torsional motion about the center of twist is examined based on the theory of strain gradient nonlocal elasticity in this work. The mathematical background is constructed based on both strain gradient theory and Eringen's nonlocal elasticity theory. The equation of motions and boundary conditions of radially functionally graded nanorods are derived using Hamilton's principle and then transformed into the eigenvalue analysis by using Fourier sine series. A general coefficient matrix is obtained to assemble the Stokes' transformation. The case of a restrained functionally graded nanorod embedded in two elastic springs against torsional rotation is then deeply investigated. The effect of changing the functionally graded index, the stiffness of elastic boundary conditions, the length scale parameter and nonlocal parameter are investigated in detail.

Keywords

References

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