Size-dependent bending and vibration analysis of piezoelectric nanobeam based on fractional-order kinematic relations

doi:10.1007/s10483-025-3274-9

摘要/Abstract

Abstract:

In this paper, a fractional-order kinematic model is utilized to capture the size-dependent static bending and free vibration responses of piezoelectric nanobeams. The general nonlocal strains in the Euler-Bernoulli piezoelectric beam are defined by a frame-invariant and dimensionally consistent Riesz-Caputo fractional-order derivatives. The strain energy, the work done by external loads, and the kinetic energy based on the fractional-order kinematic model are derived and expressed in explicit forms. The boundary conditions for the nonlocal Euler-Bernoulli beam are derived through variational principles. Furthermore, a finite element model for the fractional-order system is developed in order to obtain the numerical solutions to the integro-differential equations. The effects of the fractional order and the vibration order on the static bending and vibration responses of the Euler-Bernoulli piezoelectric beams are investigated numerically. The results from the present model are validated against the existing results in the literature, and it is demonstrated that they are theoretically consistent. Although this fractional finite element method (FEM) is presented in the context of a one-dimensional (1D) beam, it can be extended to higher dimensional fractional-order boundary value problems.

Key words: scale effect, Riesz-Caputo fractional-order derivative, Euler-Bernoulli piezoelectric beam, fractional-order finite element method (FEM)

中图分类号:

O342

. [J]. Applied Mathematics and Mechanics (English Edition), 2025, 46(7): 1261-1272.

Zhiwen FAN, Hai QING. Size-dependent bending and vibration analysis of piezoelectric nanobeam based on fractional-order kinematic relations[J]. Applied Mathematics and Mechanics (English Edition), 2025, 46(7): 1261-1272.

图/表 9

参考文献 44

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