Nonlocal Bending Analysis of Bilayer Annular/Circular Nano Plates Based on First Order Shear Deformation Theory
Publish place: Journal of Solid Mechanics، Vol: 8، Issue: 3
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JSMA-8-3_014
تاریخ نمایه سازی: 12 اسفند 1398
Abstract:
In this paper, nonlinear bending analysis of bilayer orthotropic annular/circular graphene sheets is studied based on the nonlocal elasticity theory. The equilibrium equations are derived in terms of generalized displacements and rotations considering the first-order Shear deformation theory (FSDT). The nonlinear governing equations are solved using the differential quadrature method (DQM) which is a highly accurate numerical method and a new semi-analytical polynomial method (SAPM). The ordinary differential equations (ODE’s) are converted to the nonlinear algebraic equations applying DQM or SAPM. Then, the Newton–Raphson iterative scheme is applied. The obtained results of DQM and SAPM are compared. It is concluded that although, the SAPM’s formulation is considerably simple in comparison with DQM, however, the results of two methods are so close to each other. The results are validated with available researches. The effects of small scale parameter, the value of van der Waals interaction between the layers, different values of elastic foundation and loading, the comparison between the local and nonlocal deflections and linear to nonlinear analysis are investigated.
Keywords:
Bilayer orthotropic annular/circular graphene sheets , Eringen nonlocal elasticity theory , Winkler-Pasternak elastic foundation , Differential quadrature method (DQM) , Semi analytical polynomial method (SAPM)
Authors
Sh Dastjerdi
Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University
M Jabbarzadeh
Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University
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