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Vahid Borjalilou

Bio: Vahid Borjalilou is an academic researcher from Sharif University of Technology. The author has contributed to research in topics: Thermoelastic damping & Equations of motion. The author has an hindex of 8, co-authored 13 publications receiving 182 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the size-dependent behavior of micro-beams with the thermoelastic damping (TED) phenomenon is studied and coupled thermo-elasticity equations are derived on the basis of the modifi...
Abstract: In this article, the size-dependent behavior of micro-beams with the thermoelastic damping (TED) phenomenon is studied. The coupled thermoelasticity equations are derived on the basis of the modifi...

55 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present an explicit relation for thermoelastic damping in nanobeams capturing the small-scale effects on both the continuum mechanics and heat conduction domains.
Abstract: This paper aims to present an explicit relation for thermoelastic damping in nanobeams capturing the small-scale effects on both the continuum mechanics and heat conduction domains. To incorporate ...

46 citations

Journal ArticleDOI
TL;DR: In this paper, the authors dealt with the small-scale effects on the thermoelastic damping (TED) in microplates and provided coupled equations of motion and heat conduction.
Abstract: This paper deals with the small-scale effects on the thermoelastic damping (TED) in microplates. The coupled equations of motion and heat conduction are provided utilizing the strain gradient theor...

43 citations

Journal ArticleDOI
TL;DR: In this article, small-scale effects on the thermoelastic damping in microplates are studied and coupled governing equations of motion and heat conduction are obtained based on the non-classical continuum theory of the modified couple stress and the dual-phase-lag heat-conduction model.
Abstract: Thermoelastic damping (TED) is one of the main energy dissipation mechanisms in structures with small scales. On the other hand, the classical continuum theory is not capable of describing the mechanical behavior of small-scale structures. In this paper, small-scale effects on the thermoelastic damping in microplates are studied. To this end, the coupled governing equations of motion and heat conduction are obtained based on the non-classical continuum theory of the modified couple stress and the dual-phase-lag heat conduction model. By solving these coupled equations, an explicit expression including small-scale effects for calculating TED in microplates is derived. The results are compared with those given by the classical continuum and heat transfer theories. In addition, numerical results are presented to investigate the influences of some parameters on TED and critical thickness, such as microplate thickness, aspect ratio, boundary conditions, and the type of material.

40 citations

Journal ArticleDOI
TL;DR: Based on the first-order shear deformation (FSD) model and nonlocal elasticity theory, the simultaneous effects of shear and small scale on the nonlinear vibration behavior of functionally graded c... as mentioned in this paper.
Abstract: Based on the first-order shear deformation (FSD) model and nonlocal elasticity theory, the simultaneous effects of shear and small scale on the nonlinear vibration behavior of functionally graded c...

33 citations


Cited by
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01 Mar 2000
Abstract: The importance of thermoelastic damping as a fundamental dissipation mechanism for small-scale mechanical resonators is evaluated in light of recent efforts to design high-Q micrometer- and nanometer-scale electromechanical systems. The equations of linear thermoelasticity are used to give a simple derivation for thermoelastic damping of small flexural vibrations in thin beams. It is shown that Zener’s well-known approximation by a Lorentzian with a single thermal relaxation time slightly deviates from the exact expression.

106 citations

01 Jan 2016
TL;DR: Thank you very much for downloading thermal stresses advanced theory and applications for reading a good book with a cup of tea in the afternoon, instead they juggled with some malicious virus inside their desktop computer.
Abstract: Thank you very much for downloading thermal stresses advanced theory and applications. As you may know, people have look hundreds times for their chosen novels like this thermal stresses advanced theory and applications, but end up in infectious downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they juggled with some malicious virus inside their desktop computer.

104 citations

Journal ArticleDOI
02 Aug 2020-Symmetry
TL;DR: This paper aims to discuss nonlocal nanobeams analysis depending on the theories of Euler–Bernoulli and modified couple-stress (MCS), where it is assumed that the thermal conductivity of the nanobeam is dependent on the temperature.
Abstract: At present, with the development in nanotechnology, nanostructures with temperature-dependent properties have been used in nano-electromechanical systems (NEMS). Thus, introducing an accurate mathematical model of nanobeams with temperature-dependent properties is a major and important topic for the design of NEMS. This paper aims to discuss nonlocal nanobeams analysis depending on the theories of Euler–Bernoulli and modified couple-stress (MCS). It also is assumed that the thermal conductivity of the nanobeam is dependent on the temperature. Physical fields of the nanobeam are obtained utilizing Laplace transform and state-space techniques. The effects of the size and nonlocal parameters, variability of thermal conductivity and couple stress on various distributions are presented graphically and studied in detail. Numerical results are presented as application scales and the design of nanoparticles, nanoscale oscillators, atomic force microscopes, and nanogenerators, in which nanoparticles as nanobeams act as essential and basic elements.

72 citations

Journal ArticleDOI
TL;DR: In this article, a review has been carried regarding predicting material properties of single-walled carbon nanotubes (SWCNTs) using computational models and different approaches related to predicting the properties are discussed in detail.

65 citations

Journal ArticleDOI
TL;DR: In this paper, the size-dependent response assessment of carbon nanotubes (CNTs) is investigated in the context of nanocomposites and nano-systems.
Abstract: Carbon nanotubes (CNTs) are principal constituents of nanocomposites and nano-systems. CNT size-dependent response assessment is therefore a topic of current interest in Mechanics of Advanc...

51 citations