Coupled systems mechanics

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Surface effect on forced vibration of DNS by viscoelastic layer under a moving load

  • Hosseini, S.A.H. (Buin Zahra Higher Education Center of Engineering and Technology, Imam Khomeini International University) ;
  • Rahmani, O. (Smart Structures and New Advanced Materials Laboratory, Department of Mechanical Engineering, University of Zanjan) ;
  • Hayati, H. (Faculty of Engineering and Information Technology, University of Technology Sydney) ;
  • Jahanshir, A. (Buin Zahra Higher Education Center of Engineering and Technology, Imam Khomeini International University)
  • Received : 2020.10.18
  • Accepted : 2021.07.01
  • Published : 2021.08.25
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Abstract

The surface effect for a forced vibration of a double-nanobeam-system (DNS) coupled by a viscoelastic layer under a moving constant load is studied in this paper. The viscoelastic layer that couples the nanobeams to each other, is modelled as spring-damper system. The Euler- Bernoulli theory and a simply supported boundary condition are considered for both nanobeams. By using the analytical solution, the dynamic displacement is obtained by considering the surface elasticity and residual tension effect on each nanobeams. Furthermore, the several significant parameters such as the velocity of the moving load, spring constant, damping coefficient and also the surface effect have been studied using some plots and examples. Finally, by observing the diagrams it was concluded that as the length of the beams reduces, the surface effect has a considerable effect on each of nanobeams especially at Nano scale, where it was not achieved by classic theories.

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References

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