IMECH-IR  > 非线性力学国家重点实验室
LOCAL BENDING OF THIN FILM ON VISCOUS LAYER
Zhang Y(张吟); Liu Y; Zhang Y
Source PublicationActa Mechanica Solida Sinica
2010
Volume23Issue:2Pages:106-114
ISSN0894-9166
AbstractEffects 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.
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Indexed BySCI
Language英语
WOS IDWOS:000278350900002
WOS KeywordCOMPRESSED ELASTIC FILM ; STRESSED SOLIDS ; CANTILEVER BEAM ; SURFACE STRESS ; QUANTUM DOTS ; ISLANDS ; GROWTH ; INSTABILITY ; TRANSITION ; DIFFUSION
WOS Research AreaMaterials Science ; Mechanics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [10721202] ; LNM
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/43511
Collection非线性力学国家重点实验室
Corresponding AuthorZhang Y
Recommended Citation
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.
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