Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies

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	Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies
	Zhang Y(张吟); Zhao YP(赵亚溥)
刊名	International Journal of Solids and Structures
	2016-12
卷号	102-103 页码:259-266
关键词	Nonlocal effects Micro/nanobeam Resonant frequency Inverse problem
ISSN号	0020-7683
产权排序	[Zhang, Yin; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
中文摘要	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.
分类号	一类/力学重要期刊
类目[WOS]	Mechanics
研究领域[WOS]	Mechanics
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.ijsolstr.2016.09.034
语种	英语
WOS记录号	WOS:000389390200023
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59677]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	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,2016,102-103:259-266.
APA	张吟,&赵亚溥.(2016).Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies.International Journal of Solids and Structures,102-103,259-266.
MLA	张吟,et al."Measuring the nonlocal effects of a micro/nanobeam by the shifts of resonant frequencies".International Journal of Solids and Structures 102-103(2016):259-266.