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  Volume 6, Number 4, October 2021 , pages 301-317
DOI: https://doi.org/10.12989/acd.2021.6.4.301
 

Analyzing dynamic characteristics of nonlocal porous graded beams under impulse and thermal loading
Mouayed H.Z. Al-Toki, Raad M. Fenjan, Ridha A. Ahmed, Nadhim M. Faleh, and Wael Najm Abdullah

 
Abstract
    In the framework of nonlocal strain gradient theory, the dynamic responses of a porous functionally graded (FG) nano-size beam under half-sine impulse load and thermal environment. The half-sine impulse load has been modeled as a point load located on the top surface of the nano-size beam. The exerted impulse load leads to the transient vibrations of the nano-size beam at a prescribed time. The porous beam has been described with two pore distributions named even-type and uneven-type pores. The formulation has been developed based upon the refined beam model while the equations will be solved numerically using differential quadrature (DQ) method. Finally, the dynamic deflections in transient region will be derived with the usage of Laplace transform technique. It will be indicated that temperature variation, pore distribution and nano-scale factors have remarkable influences on dynamic resonse of the nano-size beam subjected to sine-type impulse loads.
 
Key Words
    integrated ceiling; seismic ceiling; ceiling modules; FEM analysis
 
Address
Mouayed H.Z. Al-Toki:Middle Technical University, Technical College, Baghdad, Iraq

Raad M. Fenjan:Al-Mustansiriah University, Engineering Collage P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq

Ridha A. Ahmed:Al-Mustansiriah University, Engineering Collage P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq

Nadhim M. Faleh:Al-Mustansiriah University, Engineering Collage P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq

Wael Najm Abdullah:Al-Mustansiriah University, Engineering Collage P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq
 

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