Material structure and size effects on the nonlinear dynamics of electrostatically-actuated nano-beams

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• 作者：M. Shaat ^{shaat@nmsu.edu} ; A. Abdelkefi ; ^{abdu@nmsu.edu}
• 关键词：Nanocrystalline materials ; Nonlinear dynamics ; Electrostatically actuated beams ; Surface effects ; Couple stress
• 刊名：International Journal of Non-Linear Mechanics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：89
• 期：Complete
• 页码：25-42
• 全文大小：2938 K
• 卷排序：89

文摘

A nonlinear model for electrostatically actuated beams made of nanocrystalline materials is proposed. Two sets of measures are incorporated in the context of the proposed model. All the measures presented in the micromechanical model are related to the material structure. A size-dependent Euler-Bernoulli beam model is developed to model the mechanics of the nano-beam. The impacts of the material structure and size on the nonlinear dynamics and pull-in instability are studied.