Influence of surface energy on the non-linear pull-in instability of nano-switches

K Wang, Baolin Wang

    Research output: Contribution to journalArticlepeer-review


    This paper investigates the pull-in instability of a nano-switch under electrostatic and intermolecular Casimir forces. The analysis is based on the geometrically non-linear Euler-Bernoulli beam theory with consideration of the surface energy. Through differential quadrature method (DQM), the pull-in voltages of the nano-switch are obtained. Results show that the effect of surface energy and geometrically non-linear deformation on the pull-in voltage depends on the length, height and initial gap of the nano-switch. In addition, the effect of intermolecular Casimir force on the pull-in voltage weakens as the initial gap increases.
    Original languageEnglish
    Pages (from-to)69-75
    Number of pages7
    JournalInternational Journal of Non-Linear Mechanics
    Publication statusPublished - Jan 2014


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