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Geomechanics and Engineering
  Volume 26, Number 1, July10 2021, pages 89-99
DOI: https://doi.org/10.12989/gae.2021.26.1.089
 


Analyzing dynamic response of nonlocal strain gradient porous beams under moving load and thermal environment
Kareem Mohsen Raheef, Ridha A. Ahmed, Adil Abed Nayeeif, Raad M. Fenjan and Nadhim M. Faleh

 
Abstract
    This research presents dynamic response analysis of a porous functionally graded (FG) nanobeam under a moving point load. The nanobeam formulation has been established with the use of a higher-order refined beam model and nonlocal strain gradient theory (NSGT) including two scale factors named nonlocal and strain gradient factors. The porous FG material has been modeled via modified power-law functions which contain porosity volume according to even or uneven porosity dispersions. Moreover, graded nonlocality has been considered in order to provide a better modeling of size effects for FG nano-size structures. The governing equations of the nanobeam have been discretized with the use of differential quadrature method (DQM) and inverse Laplace transform approach has been utilized to calculate the dynamic deflections. The main findings of the present research indicate the influences of nonlocal strain gradient factors, moving load speed, pore amount, porosity distribution and elastic medium on dynamic deflection of FG nanobeams.
 
Key Words
    dynamic response; thermal load; moving load; porosity; strain gradient
 
Address
Kareem Mohsen Raheef, Ridha A. Ahmed, Adil Abed Nayeeif, Raad M. Fenjan and Nadhim M. Faleh: College of Engineering, Mustansiriah University, P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq
 

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