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Nonlocal microstructure-dependent dynamic stability of refined porous FG nanoplates in hygro-thermal environments

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Abstract.

Based on the generalized nonlocal strain gradient theory (NSGT), dynamic modeling and analysis of nanoporous inhomogeneous nanoplates is presented. Therefore, it is possible to capture both stiffness-softening and stiffness-hardening effects for a more accurate dynamic analysis of nanoplates. The nanoplate is in hygro-thermal environments and is subjected to an in-plane harmonic load. Porosities are incorporated to the model based on a modified rule of mixture. Modeling of the porous nanoplate is conducted according to a refined four-variable plate theory with fewer field variables than in the first-order plate theory. The governing equations and related classical and nonclassical boundary conditions are derived based on Hamilton’s principle. These equations are solved for hinged nanoplates via Galerkin’s method. It is shown that porosities, moisture rise, temperature rise, nonlocal parameter, strain gradient parameter, material gradation, elastic foundation and uniform dynamic load have a remarkable influence on the dynamic behavior of nanoscale plates.

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Authors and Affiliations

  1. Aerospace Engineering Department & Center of Excellence in Computational Aerospace, Amirkabir University of Technology, Tehran, Iran

    Mohammad Reza Barati

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  1. Mohammad Reza Barati
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Correspondence to Mohammad Reza Barati.

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Reza Barati, M. Nonlocal microstructure-dependent dynamic stability of refined porous FG nanoplates in hygro-thermal environments. Eur. Phys. J. Plus 132, 434 (2017). https://doi.org/10.1140/epjp/i2017-11686-2

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