Effect of different AFM micro cantilever in fluid on the rough surface topography quality close to the surface

2017 ◽  
Author(s):  
Alireza Habibnejad Korayem ◽  
Moharam Habibnejad Korayem
Keyword(s):  
Surface Topography ◽  
Rough Surface ◽  
Micro Cantilever

Analysis of Plastic Strain between Substrate and Micro-Cantilever under Different Deformation Characteristics

2013 ◽  
Vol 477-478 ◽  
pp. 21-24
Author(s):  
Hui Kai Gao ◽  
Jian Meng Huang
Keyword(s):  
Plastic Strain ◽  
Rough Surface ◽  
Three Dimensional ◽  
Equivalent Plastic Strain ◽  
Adhesive Contact ◽  
Contact Model ◽  
Deformation Characteristics ◽  
Element Analysis ◽  
Flat Substrate ◽  
Micro Cantilever

The contact between substrate and micro-cantilever simplified as an ideal flat substrate contact with a micro-cantilever rough surface. A three-dimensional adhesive contact model was established on isotropic rough surfaces exhibiting fractal behavior, and the equivalent plastic strain was discussed using the finite element analysis. The maximum equivalent plastic strain and its depth were presented with the different paths of rough solid when loading. The result show that the equivalent plastic strain versus different depth which at different locations showed different laws, in the top area of the asperities versus different depth, the maximum equivalent plastic strain occurs in the subsurface range about 0.5μm from the surface or on the surface. In addition, with different deformation characteristics, the degree of the equivalent plastic strain was different.. The contact model between micro-cantilever rough surface and flat substrate will lay a foundation to further research on the substance of the process of friction and wear.

EFFECT OF SURFACE TOPOGRAPHY ON SEISMIC MAPPING

Geophysics ◽  
1946 ◽  
Vol 11 (3) ◽  
pp. 362-372 ◽  
Author(s):  
M. B. Widess
Keyword(s):  
Statistical Analysis ◽  
Surface Topography ◽  
Rough Surface ◽  
Computational Methods ◽  
Surface Relief ◽  
Lateral Variations ◽  
Source Of Error ◽  
Gathering Data ◽  
Effect Of Surface ◽  
Approximate Magnitude

The presence of rough surface topography in a prospect frequently constitutes a source of error in seismic mapping and poses the question of what computational methods can be applied by which seismic maps may be freed of the effect of surface relief. Various aspects of the problem are described. The use of a plane datum‐horizon is generally adequate as a solution of the problem. For greater refinement, the structural map may be modified to account for the overburden effect, the approximate magnitude of which is considered. Further modification may be required when lateral variations in subweathering velocity occur. Statistical analysis for determining the degree of conformity between surface topography and mapped structure at depth is useful in gathering data on the influence of surface topography.

Rough surface topography enhances the activation of Wnt/β-catenin signaling in mesenchymal cells

2010 ◽  
Vol 95A (3) ◽  
pp. 682-690 ◽  
Author(s):  
Carlo Galli ◽  
Giovanni Passeri ◽  
Francesca Ravanetti ◽  
Erida Elezi ◽  
Mario Pedrazzoni ◽  
...  
Keyword(s):  
Surface Topography ◽  
Rough Surface ◽  
Mesenchymal Cells

Role of rough surface topography on gas slip flow in microchannels

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
Chengbin Zhang ◽  
Yongping Chen ◽  
Zilong Deng ◽  
Mingheng Shi
Keyword(s):  
Surface Topography ◽  
Rough Surface ◽  
Slip Flow

Application of Contourlet in Research of Rough Surface Topography

2012 ◽  
Vol 542-543 ◽  
pp. 115-118
Author(s):  
Chao Zhou ◽  
Cheng Hui Gao
Keyword(s):  
Surface Topography ◽  
Rough Surface ◽  
Surface Analysis ◽  
Signal Analysis ◽  
Elementary Theory ◽  
Rough Surfaces ◽  
Good Method ◽  
Two Dimensional ◽  
Multi Scale

Since the tribology properties of rough surfaces are closely related to its topography, one of the most important ingredients in tribology research is to find an appropriate tool to analyze and characterize rough surfaces. The elementary theory of contourlet which is a good method for multi-scale and multi-direction signal analysis was introduced and an application of contourlet in rough surface analysis was demonstrated. It was found that contourlet is more sensitive to curved features than general two dimensional wavelets; it is possible to become a new powerful tool for rough surface analysis and characterization.

scholarly journals Multiscale Model Reduction of the Unsaturated Flow Problem in Heterogeneous Porous Media with Rough Surface Topography

Mathematics ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 904
Author(s):  
Denis Spiridonov ◽  
Maria Vasilyeva ◽  
Eric T. Chung ◽  
Yalchin Efendiev ◽  
Raghavendra Jana
Keyword(s):  
Porous Media ◽  
Boundary Conditions ◽  
Surface Topography ◽  
Rough Surface ◽  
Heterogeneous Porous Media ◽  
Coarse Grid ◽  
Basis Functions ◽  
Richards Equation ◽  
Small Scale ◽  
Fine Grid

In this paper, we consider unsaturated filtration in heterogeneous porous media with rough surface topography. The surface topography plays an important role in determining the flow process and includes multiscale features. The mathematical model is based on the Richards’ equation with three different types of boundary conditions on the surface: Dirichlet, Neumann, and Robin boundary conditions. For coarse-grid discretization, the Generalized Multiscale Finite Element Method (GMsFEM) is used. Multiscale basis functions that incorporate small scale heterogeneities into the basis functions are constructed. To treat rough boundaries, we construct additional basis functions to take into account the influence of boundary conditions on rough surfaces. We present numerical results for two-dimensional and three-dimensional model problems. To verify the obtained results, we calculate relative errors between the multiscale and reference (fine-grid) solutions for different numbers of multiscale basis functions. We obtain a good agreement between fine-grid and coarse-grid solutions.

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