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Numerical investigation on scale-dependent vibrations of porous foam plates under dynamic loads

  • Fenjan, Raad M. (Al-Mustansiriah University) ;
  • Ahmed, Ridha A. (Al-Mustansiriah University) ;
  • Faleh, Nadhim M. (Ministry of construction and housing) ;
  • Fatima, Fatima Masood (Al-Mustansiriah University)
  • Received : 2019.07.29
  • Accepted : 2020.03.17
  • Published : 2020.06.25
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Abstract

Dynamic responses of porous piezoelectric and metal foam nano-size plates have been examined via a four variables plate formulation. Diverse pore dispersions named uniform, symmetric and asymmetric have been selected. The piezoelectric nano-size plate is subjected to an external electrical voltage. Nonlocal strain gradient theory (NSGT) which includes two scale factors has been utilized to provide size-dependent model of foam nanoplate. The presented plate formulation verifies the shear deformations impacts and it gives fewer number of field components compared to first-order plate model. Hamilton's principle has been utilized for deriving the governing equations. Achieved results by differential quadrature (DQ) method have been verified with those reported in previous studies. The influences of nonlocal factor, strain gradients, electrical voltage, dynamical load frequency and pore type on forced responses of metal and piezoelectric foam nano-size plates have been researched.

Keywords

Acknowledgement

The authors would like to thank Mustansiriyah university (www.uomustansiriyah.edu.iq) Baghdad-Iraq for its support in the present work.

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