LOCAL BENDING OF THIN FILM ON VISCOUS LAYER

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	LOCAL BENDING OF THIN FILM ON VISCOUS LAYER
	Zhang Y(张吟); Liu Y; Zhang Y
刊名	Acta Mechanica Solida Sinica
	2010
通讯作者邮箱	zhangyin@lnm.imech.ac.cn
卷号	23 期号:2 页码:106-114
ISSN号	0894-9166
通讯作者	Zhang Y
合作状况	国内
中文摘要	Effects of deposition layer position and number/density on local bending of a thin film are systematically investigated. Because the deposition layer interacts with the thin film at the interface and there is an offset between the thin film neutral surface and the interface, the deposition layer generates not only axial stress but also bending moment. The bending moment induces an instant out-of-plane deflection of the thin film, which may or may not cause the so-called local bending. The deposition layer is modeled as a local stressor, whose location and density are demonstrated to be vital to the occurrence of local bending. The thin film rests on a viscous layer, which is governed by the Navier-Stokes equation and behaves like an elastic foundation to exert transverse forces on the thin film. The unknown feature of the axial constraint force makes the governing equation highly nonlinear even for the small deflection case. The constraint force and film transverse deflection are solved iteratively through the governing equation and the displacement constraint equation of immovable edges. This research shows that in some special cases, the deposition density increase does not necessarily reduce the local bending. By comparing the thin film deflections of different deposition numbers and positions, we also present the guideline of strengthening or suppressing the local bending.
类目[WOS]	Materials Science, Multidisciplinary ; Mechanics
研究领域[WOS]	Materials Science ; Mechanics
关键词[WOS]	COMPRESSED ELASTIC FILM ; STRESSED SOLIDS ; CANTILEVER BEAM ; SURFACE STRESS ; QUANTUM DOTS ; ISLANDS ; GROWTH ; INSTABILITY ; TRANSITION ; DIFFUSION
收录类别	SCI
资助信息	National Natural Science Foundation of China [10721202]; LNM
原文出处	http://www.cnki.com.cn/Article/CJFDTotal-GTLB201002003.htm
语种	英语
WOS记录号	WOS:000278350900002
公开日期	2011-03-01 ; 2011-03-30
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/43511]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Zhang Y
推荐引用方式 GB/T 7714	Zhang Y,Liu Y,Zhang Y. LOCAL BENDING OF THIN FILM ON VISCOUS LAYER[J]. Acta Mechanica Solida Sinica,2010,23(2):106-114.
APA	张吟,Liu Y,&Zhang Y.(2010).LOCAL BENDING OF THIN FILM ON VISCOUS LAYER.Acta Mechanica Solida Sinica,23(2),106-114.
MLA	张吟,et al."LOCAL BENDING OF THIN FILM ON VISCOUS LAYER".Acta Mechanica Solida Sinica 23.2(2010):106-114.