Moving load excited dynamics of multi-layered imperfect microplates based on various micromechanical models

International Journal of Engineering Science, Journal Year: 2024, Volume and Issue: 197, P. 104017 - 104017

Published: Feb. 2, 2024

This paper presents an investigation into the importance of micromechanical models in analysis forced vibrations multi-layered microplates under a moving load. The microplate has core fabricated from functionally graded materials and face sheets consisting metal foam. problem is modelled via quasi-3D shear deformable method modified couple stress theory. study assumes that material follows power gradation pattern. Various models, i.e., Hashin-Shtrikman bounds, Voigt-Reuss-Hill, Voigt, Reuss, Tamura, are applied to estimate characteristics core. sheets, composed foams, possess closed- open-cell solid porosities. System's response time history type determined by numerically solving coupled motion equations obtained using force-moment balance method. A finite element conducted for simplified macroplate system, agreement between numerical results, proposed theoretical approach theory developed this paper, found be very good. results show influence mechanical properties layer, consequently impacting moving-load excited microsystem.

Language: Английский

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Dynamic behaviour of carbon-nanotube reinforced functionally graded double-arch systems

International Journal of Engineering Science, Journal Year: 2024, Volume and Issue: 196, P. 104024 - 104024

Published: Jan. 16, 2024

The goal of the current investigation is to determine dynamic behaviour double-arch systems: system made two arches reinforced by three different functionally graded patterns carbon nanotubes and connected with an elastic layer spring bed. carbon-nanotube considered are uniformly distributed, FG-X FG-O. Two boundary conditions movable immovable simply supported (named SS1 SS2) studied for double-arches, where displacements along curve-line constrained ends SS2 arches. Both Hamilton principle force-moment technique utilised formulate coupled equations motion. A series expansion then used solve equations. validation performed consistent agreement between proposed methodology simplified version achieved. One prominent observation arising from this study that increase in opening angle results a decline both transverse natural frequencies SS1. Conversely, systems exhibit initial rise as increases, followed gradual decrease. thicker demonstrates increased natural-frequency sensitivity variation angles. Lastly, increasing coefficient stiffness causes increment second frequency system.

Language: Английский

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Unified nonlocal surface elastic-based thermal induced asymmetric nonlinear buckling of inhomogeneous nano-arches subjected to dissimilar end conditions

Composite Structures, Journal Year: 2025, Volume and Issue: unknown, P. 118961 - 118961

Published: Feb. 1, 2025

Language: Английский

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Free Vibration of Bi-Directional Functionally Graded Nanobeams Resting on Winkler–Pasternak Foundations

Journal of Vibration Engineering & Technologies, Journal Year: 2024, Volume and Issue: unknown

Published: July 20, 2024

Language: Английский

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On wave propagation in nanobeams

International Journal of Engineering Science, Journal Year: 2024, Volume and Issue: 196, P. 104014 - 104014

Published: Jan. 6, 2024

Wave propagation in Rayleigh nanobeams resting on nonlocal media is investigated this paper. Small-scale structure-foundation problems are formulated according to a novel consistent approach extending the special elastostatic analysis Barretta et al. (2022). Nonlocal effects of nanostructure modelled stress-driven integral law. External elasticity nano-foundation instead described by displacement-driven spatial convolution. The developed methodology leads well-posed continuum problems, thus circumventing issues and applicative difficulties Eringen–Wieghardt approach. interacting with nano-foundations then analysed dispersive features analytically detected exploiting strategy. Closed form expressions size-dependent dispersion relations established connection outcomes available literature contributed. A general provided address wave nanomechanical problems. Parametric studies finally accomplished discussed show length scale parameters characteristics small-scale systems current interest Nano-Engineering.

Language: Английский

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Examination of the high-frequency behavior of functionally graded porous nanobeams using nonlocal simple higher-order shear deformation theory

Acta Mechanica, Journal Year: 2024, Volume and Issue: 235(5), P. 2695 - 2714

Published: Feb. 7, 2024

Language: Английский

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On torsion of FG elastic nanobeams on nonlocal foundations

Composite Structures, Journal Year: 2024, Volume and Issue: 340, P. 118146 - 118146

Published: April 24, 2024

A plethora of challenging nanomechanical applications deals with ultrasmall composite structures interacting nonlocal media. To capture size dependent behaviors, effective tools Nonlocal Continuum Mechanics can be conveniently adopted, provided that the relevant structural problem is well-posed. crucial improvement in modeling nanobeams on nanofoundations present work respect to formulation based Eringen–Wieghardt approach. Scale effects FG under torsion are effectively captured by exploiting consistent stress-driven integral theory elasticity. novel elastic foundations here introduced. Notably, constitutive behavior describing interaction between twisted and surrounding media modeled spatial convolution driven torsional rotation field. It shown governing mathematically represented an integro-differential formulation. An equivalent simpler differential then proven reduce computational burdens. Exemplar case-studies finally examined show efficacy developed methodology.

Language: Английский

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An investigation on ensemble machine learning algorithms for nonlinear stability response of a two-dimensional FG nanobeam

Journal of the Brazilian Society of Mechanical Sciences and Engineering, Journal Year: 2024, Volume and Issue: 46(9)

Published: Aug. 16, 2024

Language: Английский

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Nonlocal stability of curved carbon nanotubes conveying fluid based on Eringen’s nonlocal elasticity theory in a thermomagnetic environment

Acta Mechanica, Journal Year: 2024, Volume and Issue: 235(7), P. 4273 - 4287

Published: April 27, 2024

Language: Английский

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Thermal buckling response of foam core smart sandwich nanoplates with electro-elastic and magneto-strictive layers

Acta Mechanica, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

Language: Английский

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