Post-buckling analysis of imperfect multi-phase nanocrystalline nanobeams considering nanograins and nanopores surface effects
作者： Mohammad Reza Barati , Ashraf M. Zenkour
DOI: 10.1016/J.COMPSTRUCT.2017.10.019
关键词: Galerkin method 、 Beam (structure) 、 Buckling 、 Phase (matter) 、 Condensed matter physics 、 Nanocrystalline material 、 Nanocrystalline silicon 、 Nonlinear system 、 Structural engineering 、 Materials science 、 Porosity
摘要: Abstract In this paper, a size-dependent nonlinear higher order refined beam model is developed based on modified couple stress theory. Then, it applied to investigate post-buckling behavior of multi-phase nanocrystalline silicon nanobeams with geometrical imperfection. Nanocrystalline materials (NcMs) are composites the contribution nanopores, nanograins and interface phase. Because experimental observation strain gradients near phase, nanobeam modeled via gradient A micromechanical Mori-Tanaka scheme employed incorporate size nanograins/nanopores their surface energies. The load-deflection relation obtained by solving governing equations having cubic nonlinearity applying Galerkin’s method needless any iteration process. New results show importance porosity percentage, size, imperfection, parameter, foundation parameters phase buckling NcM nanoscale beams.
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