Author
Mergen H. Ghayesh
Other affiliations: University of Wollongong, Tarbiat Modares University, Shenzhen University ...read more
Bio: Mergen H. Ghayesh is an academic researcher from University of Adelaide. The author has contributed to research in topics: Nonlinear system & Galerkin method. The author has an hindex of 60, co-authored 254 publications receiving 9691 citations. Previous affiliations of Mergen H. Ghayesh include University of Wollongong & Tarbiat Modares University.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the nonlinear forced vibrations of a microbeam are investigated by employing the strain gradient elasticity theory, and the geometrically nonlinear equation of motion of the microbeam, taking into account the size effect, is obtained employing a variational approach.
253 citations
TL;DR: In this paper, the nonlinear resonant dynamics of a microscale beam is studied numerically by means of the pseudo-arclength continuation technique, which is capable of continuing both the stable and unstable solution branches as well as determining different types of bifurcations.
Abstract: In the present study, the nonlinear resonant dynamics of a microscale beam is studied numerically. The nonlinear partial differential equation governing the motion of the system is derived based on the modified couple stress theory, employing Hamilton’s principle. In order to take advantage of the available numerical techniques, the Galerkin method along with appropriate eigenfunctions are used to discretize the nonlinear partial differential equation of motion into a set of nonlinear ordinary differential equations with coupled terms. This set of equations is solved numerically by means of the pseudo-arclength continuation technique, which is capable of continuing both the stable and unstable solution branches as well as determining different types of bifurcations. The frequency–response curves of the system are constructed. Moreover, the effect of different system parameters on the resonant dynamic response of the system is investigated.
247 citations
TL;DR: In this paper, the authors investigated the nonlinear size-dependent behavior of an electrically actuated MEMS resonator based on the modified couple stress theory; the microbeam is excited by an AC voltage which is superimposed on a DC voltage.
246 citations
TL;DR: In this paper, the authors investigated the nonlinear dynamics of a geometrically imperfect microbeam numerically on the basis of the modified couple stress theory and obtained the linear natural frequencies of the system.
244 citations
TL;DR: A critical review of nonlinear techniques which have been investigated for performance enhancement of energy harvesters in the past decade and the present state of the art of energy Harvesters which utilise this technique is conducted.
226 citations
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TL;DR: The paper summarizes the works led to the current wind energy and hydro energy harvesters based on the principle of flow- induced vibrations, including bladeless generator Vortex Bladeless, University of Michigan vortex-induced vibrations aquatic clean energy, Australian BPS company's airfoil tidal energy capture device bioSTREAM, and others.
313 citations
TL;DR: In this paper, a size-dependent beam model is proposed for nonlinear free vibration of a functionally graded (FG) nanobeam with immovable ends based on the nonlocal strain gradient theory (NLSGT) and Euler-Bernoulli beam theory in conjunction with the von-Karman's geometric nonlinearity.
313 citations
TL;DR: In this paper, a size-dependent nonlinear Euler-Bernoulli beam is considered in the framework of the nonlocal strain gradient theory and the geometric nonlinearity due to the stretching effect of the midplane of the size dependent beam was considered, and the governing equations and boundary conditions were derived by employing the Hamilton principle.
295 citations
TL;DR: In this paper, a comprehensive review on the development of higher-order continuum models for capturing size effects in small-scale structures is presented, mainly focusing on the size-dependent beam, plate and shell models developed based on the nonlocal elasticity theory, modified couple stress theory and strain gradient theory.
275 citations
TL;DR: In this article, the nonlinear forced vibrations of a microbeam are investigated by employing the strain gradient elasticity theory, and the geometrically nonlinear equation of motion of the microbeam, taking into account the size effect, is obtained employing a variational approach.
253 citations