Smart Structures and Systems

  • 제27권4호
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  • Pages.679-689
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  • 2021
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Damped forced vibration analysis of layered functionally graded thick beams with porosity

  • Alnujaie, Ali (Mechanical Engineering Department, Faculty of Engineering, Jazan University) ;
  • Akbas, Seref D. (Department of Civil Engineering, Bursa Technical University) ;
  • Eltaher, Mohamed A. (Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University) ;
  • Assie, Amr E. (Mechanical Engineering Department, Faculty of Engineering, Jazan University)
  • 투고 : 2020.06.27
  • 심사 : 2020.11.27
  • 발행 : 2021.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The following article presents the damped forced vibration of layered functionally graded thick beams including material porosities. In case of very thick beams, beam theories fail to satisfy boundary conditions and to predict the mechanical response accurately. So, the two-dimensional (2D) plane continuum model is exploited to model a thick functionally graded layered beam. The beam is composed from three- layers with functionally graded porous materials. The porosity is described by three different distribution models through the layer thickness. Applied forces to the functionally graded beam are assumed to be sinusoidal harmonic point load in time domain. The Kelvin-Voigt viscoelastic constitutive model is used to simulate damping effect. The governing equations are obtained by using Lagrange's equations. In frame of finite element analysis, twelve -node 2D plane element is exploited to discretize the space domain of thick beam. In the solution of the dynamic problem, the Newmark average acceleration method is used. Numerical studies illustrate effects of porosity distribution, stacking sequence, and graduation constant on the dynamic responses of layered functionally graded porous thick beams. The results show that the porosity function, stacking sequences and the damping ratio have a vital role in dynamic response of functionally graded beams. The proposed model can be used in nuclear, marine, and aerospace technologies.

키워드

과제정보

The project was funded by Deanship of Scientific Research (DSR) at Jazan University, Jazan, Kingdom of Saudi Arabia under grant no. W41-045. The authors acknowledge with thanks DSR for technical and financial support.

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