article · Mechanics of Advanced Materials and Structures
An investigation examines the postbuckling behaviour of nanocomposite beams reinforced with graphene platelets, taking into account geometrical imperfections and different porosity patterns. The platelets are modelled as either uniformly or non-uniformly dispersed across the thickness of the beam, with material elastic properties derived using the Halpin-Tsai micromechanics framework. The governing equations, which feature cubic nonlinearity, are solved directly through Galerkin's method without requiring iterative calculations to generate the postbuckling load-deflection relationship. Findings demonstrate that the postbuckling response of both ideal and imperfect nanoscale beams is significantly altered by porosity levels, the distribution of pores, platelet concentration, platelet arrangement, initial geometrical imperfections, and foundation parameters. Specifically, the interplay between internal pores and graphene reinforcement governs how these structures deform under compressive loads.
Understanding structural stability in advanced nanocomposites is essential for predicting failure under compressive loads. This study clarifies how microscale features such as graphene distribution, pores, and geometric flaws influence deformation in nanoscale beams. These insights help engineers design more resilient lightweight structures by tailoring internal material composition to resist buckling.
The abstract does not indicate a direct commercial application pathway or specify target end users, representing early-stage theoretical and numerical modelling. However, the findings could eventually inform design and simulation tools for structural engineers working with advanced composite materials, helping predict the stability of porous nanoscale components prior to physical fabrication.
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This research is concerned with the analysis of post-buckling of a nano-composite beam reinforced by graphene plateletes (GPLs) having geometrical imperfection. GPLs are uniformly and nonuniformly distributed thorough the thickness direction. Different porosity distributions are considered. The elastic properties of the nanocomposite are obtained by employing Halpin-Tsai micromechanics model. The postbuckling load-deflection relation is obtained by solving the governing equations having cubic nonlinearity applying Galerkin's method needless of any iteration process. New results show the importance of porosity coefficient, porosity distribution, GPL distribution, GPL weight fraction, geometrical imperfection, and foundation parameters on nonlinear buckling behavior of porous nanoscale beams. Specially, porosities and GPL reinforcement have a great impact on postbuckling configuration of both ideal and imperfect nanocomposite beams.
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DOI: 10.1080/15376494.2017.1400622
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