On analysis of nanocomposite conical structures

International Journal of Engineering Science, Год журнала: 2023, Номер 191, С. 103918 - 103918

Опубликована: Июль 2, 2023

Язык: Английский

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Wave propagation characteristics of quasi-3D graphene origami-enabled auxetic metamaterial plates

International Journal of Engineering Science, Год журнала: 2024, Номер unknown, С. 104185 - 104185

Опубликована: Дек. 1, 2024

Язык: Английский

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On nonlinear 3D electro-elastic numerical modeling of two-phase inhomogeneous FG piezocomposites reinforced with GNPs

International Journal of Engineering Science, Год журнала: 2024, Номер 207, С. 104174 - 104174

Опубликована: Ноя. 27, 2024

Язык: Английский

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Analysis of thermoelastic dissipation in couple stress-based beams with two-dimensional Moore–Gibson–Thompson heat conduction

Archive of Applied Mechanics, Год журнала: 2025, Номер 95(2)

Опубликована: Фев. 1, 2025

Язык: Английский

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Mathematical modelling of the partial differential equations in microelectromechanical systems (MEMS) and its applications

Modern Physics Letters B, Год журнала: 2023, Номер 38(05)

Опубликована: Авг. 31, 2023

This paper presents a model of doubly clamped electrically actuated microbeam, which is commonly used structure in microelectromechanical systems (MEMS). The based on Euler–Bernoulli beam theory and includes the effect electrostatic forces beam’s deflection. electric field modeled using parallel plate capacitor model, deflection calculated Galerkin method. behavior microbeam subjected to van der Waals force, weak intermolecular force that arises from interaction between nearby surface. theory, Lennard–Jones potential. At last we study MEMS multi-walled carbon nanotubes (MWCNTs). MWCNTs have unique mechanical, thermal, electrical properties, make them ideal for use applications. approximate solution developed models found by homotopy perturbation Aboodh transformation (HPATM). HPATM mathematical method solve nonlinear equations converting into linear forms. approach involves introducing small parameter applying obtain series form. method’s accuracy defined existing literature because its matched variation iteration-based Laplace Also, compared results with finite difference validity stability analysis further established examining vicinity fixed points. Sketches are made phase portraits close equilibrium

Язык: Английский

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Thermodiffusion interactions in a homogeneous spherical shell based on the modified Moore–Gibson–Thompson theory with two time delays

Mechanics of Time-Dependent Materials, Год журнала: 2023, Номер 28(2), С. 617 - 638

Опубликована: Апрель 11, 2023

Язык: Английский

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Thermally stressed thermoelectric microbeam supported by Winkler foundation via the modified Moore–Gibson–Thompson thermoelasticity theory

ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Год журнала: 2023, Номер 103(11)

Опубликована: Июнь 11, 2023

Abstract This article offers the first investigation into thermoelectric vibration of microscale Euler‐Bernoulli beams resting on an elastic Winkler base. We developed system equations for thermoelastic microbeams using basis theory and generalized Moore–Gibson–Thompson (MGT) thermal transport framework with a single‐phase delay. At front microbeam, graphene strip connected to electrical power source was employed generate heat. In addition, influence ultra‐short‐pulsed laser microbeam is studied, taking account its heating effect. The variables were analyzed after solving mathematical by applying Laplace transform technique. Graphs showing how different inputs affect mechanical fields, such as substrate stiffness, voltage, resistance, temperature modulus pulses, are also presented. An increase in shear foundation found decrease amount deflection axial deformation microbeams. increased beam stiffness has resulted this decrease.

Язык: Английский

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On nonlinear buckling of microshells

International Journal of Engineering Science, Год журнала: 2024, Номер 199, С. 104077 - 104077

Опубликована: Апрель 26, 2024

Язык: Английский

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Influence of cracks on the nonlinear dynamic behaviors of pipes conveying fluid

Mechanics Based Design of Structures and Machines, Год журнала: 2025, Номер unknown, С. 1 - 22

Опубликована: Апрель 15, 2025

Язык: Английский

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Non-linear effects in seismic waves in high-energy earthquakes: A two-dimensional analysis for non-homogeneous isotropic media with a view towards the study of the 2009 L’Aquila earthquake

Mathematics and Mechanics of Solids, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

It is usually accepted in geophysics (and civil engineering) that linear models can be used for describing an earthquake and the consequent seismic waves’ propagation. However, large deformation experienced by soil these situations suggests this paradigm requires more critical consideration. In fact, we claim that, vicinity of some discontinuities (that are common all geophysical applications continuum models), corresponding strain concentrations make hypothesis small to inadequate. paper, verify inappropriateness a simple but reasonable case, with view future application study effects 2009 L’Aquila earthquake. To aim, start analysis which restricted two-dimensional body (i) inhomogeneity resembles Aterno River Valley, central Italy (ii) non-linearity most one, choosing energy quadratic non-linear measures deformation. More precisely, consider 2D piecewise homogeneous domain material viscoelastic isotropic geometrically non-linear. We apply, bottom such domain, excitation calculate differences response between cases. Using suitably designed numerical model, prove as conjectured, not only originate near pre-defined geometrical also propagate throughout rest domain. Moreover, find predictions frequency ratios ground acceleration time dependence amplitude produce, case models, closer experimental evidence than those obtained using model.

Язык: Английский

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