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Stability analysis of a capacitive FGM micro-beam using modified couple stress theory

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Abstract

Based on the Modified Couple Stress Theory, a functionally graded micro-beam under electrostatic forces is studied. The FGM micro-beam is made of two materials and material properties vary continuously along the beam thickness according to a power-law. Dynamic and static pull-in voltages are obtained and it is shown that the static and dynamic pull-in voltages for some materials cannot be obtained using classic theories and components of couple stress must be taken into account. In addition, it is shown that the values of pull-in voltages depend on the variation through the thickness of the volume fractions of the two constituents.

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Authors and Affiliations

  1. Mechanical Engineering Department, Urmia University, Urmia, Iran

    Behrokh Abbasnejad, Ghader Rezazadeh & Rasool Shabani

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  1. Behrokh Abbasnejad
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  2. Ghader Rezazadeh
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  3. Rasool Shabani
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Correspondence to Ghader Rezazadeh.

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Abbasnejad, B., Rezazadeh, G. & Shabani, R. Stability analysis of a capacitive FGM micro-beam using modified couple stress theory. Acta Mech. Solida Sin. 26, 427–440 (2013). https://doi.org/10.1016/S0894-9166(13)60038-5

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  • DOI: https://doi.org/10.1016/S0894-9166(13)60038-5

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