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Title:
Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies
Author: Zhang Y(张吟); Zhao YP(赵亚溥)
Source: International Journal of Solids and Structures
Issued Date: 2016-12
Volume: 102-103, Pages:259-266
Abstract: A method of using the shifts of the beam resonant frequencies to determine the unknown parameters of nonlocal effects together with other effects such as surface elasticity, surface stress and residual stress is presented. The nonlocal effects are size-dependent, which only stand out when a specimen size diminishes. However, when the size of a specimen is small, other effects may also impact its mechanical properties and it is difficult to tell them apart. Unlike the static tests, the dynamic method presented in this study can differentiate various effects and thus determine the parameters. The parameters of different effects are solved as an inverse problem and the accuracy of the method is also demonstrated. So far, there are still no clear physical mechanisms to determine the parameters of nonlocal effects and different experiments yield different results. Because of the sensitivity to pre-existing defects, the mechanical properties of a small specimen may vary from one to another and the nonlocal effects can be disguised by other effects, which leads to different or even wrong interpretations on experimental data. With the capability of differentiating various effects, this study provides a more accurate and reliable method of determining the parameters of nonlocal effects, which should be of some help to the nonlocal theories.
Keyword: Nonlocal effects ; Micro/nanobeam ; Resonant frequency ; Inverse problem
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1016/j.ijsolstr.2016.09.034
Related URLs: 查看原文
WOS Subject: Mechanics
WOS Subject Extended: Mechanics
WOS ID: WOS:000389390200023
ISSN: 0020-7683
Funder: The research has been supported by the National Natural Science Foundation of China (NSFC No. 11372321)
Rank: [Zhang, Yin; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
Department: LNM纳/微系统力学与物理力学
Classification: 一类/力学重要期刊
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/59677
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Zhang Y,Zhao YP. Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies[J]. International Journal of Solids and Structures,2016-12-01,102-103:259-266.
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