Buckling behavior of nanowires predicted by a new surface energy density model

doi:10.1007/s00707-016-1597-2

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	Buckling behavior of nanowires predicted by a new surface energy density model
	Yao Y(姚寅); Chen SH(陈少华); Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
发表期刊	ACTA MECHANICA
	2016
卷号	227 期号:7 页码:1799-1811
ISSN	0001-5970
摘要	The axial buckling behavior of nanowires is investigated with a new continuum theory, in which the surface effect of nanomaterials is characterized by the surface energy density. Only the surface energy density of bulk materials and the surface relaxation parameter are involved, instead of the surface elastic constants in the classical surface elasticity theory. Two kinds of nanowires with different boundary conditions are discussed. It is demonstrated that the new continuum theory can predict the buckling behavior of nanowires very well. Similar to the prediction of the classical elasticity theory, the critical compressive load of axial buckling of nanowires predicted by the new continuum theory increases with an increasing characteristic length, such as the diameter or height of nanowires. With the same aspect ratio, a nanowire with a rectangular cross section possesses a larger critical buckling load than that with a circular one. However, the surface effect could enhance the critical buckling load not only for a fixed-fixed nanowire but also for a cantilevered one in contrast to the classical elastic model. All the results predicted by the new continuum theory agree well with predictions by the surface elasticity models. The present research not only verifies the validation of the new continuum theory, but also gives a much more convenient characterization of buckling behaviors of nanowires. This should be helpful for the design of nanodevices based on nanomaterials, for example, nanobeams in NEMS or high-precision instruments.
DOI	10.1007/s00707-016-1597-2
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000378775700001
WOS研究方向	Mechanics
WOS类目	Mechanics
项目资助者	The work reported here is supported by NSFC by Grants #11372317, #11125211, #11402270, the Nanoproject (2012CB937500) and the CAS/SAFEA International Partnership Program for Creative Research Teams.
课题组名称	LNM仿生材料与固体的微尺度力学
论文分区	二类
力学所作者排名	True
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59510
专题	非线性力学国家重点实验室
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Yao Y,Chen SH,Chen, SH . Buckling behavior of nanowires predicted by a new surface energy density model[J]. ACTA MECHANICA,2016,227,7,:1799-1811.
APA	姚寅,陈少华,&Chen, SH .(2016).Buckling behavior of nanowires predicted by a new surface energy density model.ACTA MECHANICA,227(7),1799-1811.
MLA	姚寅,et al."Buckling behavior of nanowires predicted by a new surface energy density model".ACTA MECHANICA 227.7(2016):1799-1811.

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