DETECTION OF NONLOCAL CALIBRATION PARAMETERS AND RANGE INTERACTION FOR DYNAMICS OF FGM POROUS NANOBEAMS UNDER ELECTRO-MECHANICAL LOADS

IF 10.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

Facta Universitatis-Series Mechanical Engineering Pub Date : 2022-11-30 DOI:10.22190/fume210207007j

P. Jankowski

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引用次数: 4

Abstract

The present investigation examines the range of effect of nonlocal parameters on dynamic behavior of a smart beam-like nanostructure modeled as sandwich functionally graded porous nanobeam with piezoelectric layers. Therefore, the study is concentrated on determining length of the structure for which nonlocal effects are observed for vibration of nanobeam under in-plane electro-mechanical forces. The nanobeam-based NEMS device model is obtained based on assumptions of the nonlocal strain gradient theory in conjunction with Reddy higher-order shear deformation theory. The investigation present differences in obtained results for nanostructure’s free vibration based on classical and nonlocal assumptions. To study range of application of nonlocal parameters for different length of simply supported nanobeam, defined eigenvalue problem is solved in view of variation of length to thickness ratio, distribution of material properties, as well as electro-mechanical loads. What is more, the study attempts to determine and calibrate values of size-dependent coefficients based on expected natural frequencies, material properties, and applied loads. The results are completed with extensive discussion on the dependence of nonlocal parameters on nanobeam’s dynamic response, thus may be an important step forward to extend understanding of ultra-small structure’s behavior.

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机电载荷下FGM多孔纳米梁动力学非局部标定参数检测及范围相互作用

本研究考察了非局部参数对具有压电层的夹层功能梯度多孔纳米梁的智能梁状纳米结构动态行为的影响范围。因此，研究的重点是确定纳米梁在平面内机电力作用下振动的非局部效应的结构长度。基于非局部应变梯度理论的假设，结合Reddy高阶剪切变形理论，建立了基于纳米梁的NEMS器件模型。研究表明，基于经典和非局部假设的纳米结构自由振动得到的结果存在差异。为了研究不同长度简支纳米梁的非局部参数的适用范围，考虑了长厚比的变化、材料性能的分布以及机电载荷的变化，求解了定义特征值问题。更重要的是，该研究试图根据预期的固有频率、材料特性和施加的载荷来确定和校准尺寸相关系数的值。研究结果对非局部参数对纳米梁动力响应的依赖关系进行了广泛的讨论，这可能是进一步了解超小型结构行为的重要一步。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Facta Universitatis-Series Mechanical Engineering ENGINEERING, MECHANICAL-

CiteScore

14.40

自引率

2.50%

发文量

审稿时长

6 weeks

期刊介绍： Facta Universitatis, Series: Mechanical Engineering (FU Mech Eng) is an open-access, peer-reviewed international journal published by the University of Niš in the Republic of Serbia. It publishes high-quality, refereed papers three times a year, encompassing original theoretical and/or practice-oriented research as well as extended versions of previously published conference papers. The journal's scope covers the entire spectrum of Mechanical Engineering. Papers undergo rigorous peer review to ensure originality, relevance, and readability, maintaining high publication standards while offering a timely, comprehensive, and balanced review process.