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Dynamic Pull-In Instability of a Thermoelectromechanically Loaded Micro-Beam Based on "Symmetric Stress" Gradient Elasticity Theory

Author(s):



Medium: journal article
Language(s): English
Published in: International Journal of Structural Stability and Dynamics, , n. 10, v. 17
Page(s): 1750117
DOI: 10.1142/s0219455417501176
Abstract:

The dynamic pull-in instability of a thermoelectromechanically loaded micro-beam is investigated based on the “symmetric stress” gradient elasticity theory and Euler–Bernoulli beam theory. The beam is subjected to the combined action of an electric voltage, axial static force and a uniform temperature change. By employing Galerkin’s method, the nonlinear partial differential governing equation is decoupled into a set of nonlinear ordinary differential equations, which are then solved using Runge–Kutta method. Numerical results show that compared with the size-dependent micro-beam model, the classical elasticity theory in which the size effect is ignored underestimates the pull-in voltage. The effects of size, temperature change, axial force, geometric nonlinearity, fringe effect, initial gap, beam length and width on the pull-in instability of the micro-beam are discussed in detail.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1142/s0219455417501176.
  • About this
    data sheet
  • Reference-ID
    10352307
  • Published on:
    14/08/2019
  • Last updated on:
    29/05/2022
 
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