Frequency equations of nonlocal elastic micro/nanobeams with the consideration of the surface effects

作     者：H.S.ZHAO Y.ZHANG S.T.LIE 

作者机构：School of Civil and Environmental Engineering Nanyang Technological University 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2018年第39卷第8期

页      面：1089-1102页

核心收录：

学科分类：08[工学] 080101[工学-一般力学与力学基础] 0801[工学-力学（可授工学、理学学位）] 

基　　金：School of Civil and Environmental Engineering at Nanyang Technological University  Singapore for kindly supporting this research topic 

主　　题：Fredholm integral equation micro/nanobeam natural frequency nonlocal elasticity surface effect 

摘      要：A nonlocal elastic micro/nanobeam is theoretically modeled with the consideration of the surface elasticity, the residual surface stress, and the rotatory inertia,in which the nonlocal and surface effects are considered. Three types of boundary conditions, i.e., hinged-hinged, clamped-clamped, and clamped-hinged ends, are examined. For a hinged-hinged beam, an exact and explicit natural frequency equation is derived based on the established mathematical model. The Fredholm integral equation is adopted to deduce the approximate fundamental frequency equations for the clamped-clamped and clamped-hinged beams. In sum, the explicit frequency equations for the micro/nanobeam under three types of boundary conditions are proposed to reveal the dependence of the natural frequency on the effects of the nonlocal elasticity, the surface elasticity, the residual surface stress, and the rotatory inertia, providing a more convenient means in comparison with numerical computations.