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On nonlinear buckling of microshells
Publikationstyp
Journal Article
Publikationsdatum
2024-06-01
Sprache
English
Author
Department of Civil and Environmental Engineering, AmirKabir University of Technology, Tehran, Iran
Ilam University, Ilam, Iran
Akdeniz University, Antalya, Turkiye
Enthalten in
Volume
199
Article Number
104077
Citation
International Journal of Engineering Science 199: 104077 (2024)
Publisher DOI
Scopus ID
Publisher
Elsevier
Investigation of the geometrical nonlinear action of doubly curved shell panels (DCSPs) in micro scale is the main target of this paper. The proposed microshell panels (MSPs) are assumed to be made of an auxetic honeycomb core (AHOC), leading to negative magnitudes of Poisson's ratio, covered by two nanocomposite enriched coating layers (NCECLs). To conduct the size-dependent nonlinear analysis and achieve the corresponding nonlinear equilibrium path (EQP) of the proposed MSPs, the nonlocal strain gradient theory (NLSGT) is utilized. The governing equations containing the equilibrium and compatibility nonlinear partial differential equations in terms of the deformation components are analytically solved based on the Galerkin technique for different types of simply-supported panels. The achieved results of the present solution exhibit the fact that nonlocal and material length scale parameters significantly affect the EQP of the proposed MSPs especially at their post-buckling stage during their snap-through instability. By solving several numerical examples, the effects of various parameters on the size-dependent EQP of the proposed MSPs are investigated. The results indicate that the influences of size-dependency are significantly affected by the curvature and also boundary conditions of the microshells.
Schlagworte
Auxetic honeycomb core
Galerkin solution
Geometrical nonlinear
Nanocomposite enriched coating layers
Nonlocal strain gradient theory
Shell panels
snap-through instability
DDC Class
690: Building, Construction
620.1: Engineering Mechanics and Materials Science