15 Result(s)
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Article
Local Directional Fractal Signature Method for Surface Texture Analysis
The detection of changes in surface texture characteristics is an important issue in manufacturing, contact mechanics, control of interactions between surfaces, machine failure analysis, and others. These chan...
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Article
En Route to the Automated Wear Surface Classification System: Differentiating Between Adhesive, Abrasive, and Corrosive Wear Under Different Load Conditions
From the industrial view point, an automated classification system of worn surfaces is highly desirable for the monitoring and prediction of the operational health status of machines and their components. Opti...
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Article
Directional Signatures of Surface Texture
Surface texture affects adhesion, friction and wear. A key component in the studies of these effects is a multiscale and directional characterization of surfaces. However, this task is beyond the ability of st...
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Article
Effects of Nanoscale Ripple Texture on Friction and Film Thickness in EHL Contacts
The effects of nanoscale ripple texture on the film thickness and friction in elastohydrodynamically lubricated (EHL) contacts were investigated through ball-on-disc experiments and numerical simulations of li...
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Article
Characterization of DLC-Coated and Uncoated Surfaces by New Directional Blanket Curvature Covering (DBCC) Method
Roughness and curvature of diamond-like carbon (DLC) surface coatings change with both scale and direction of a measurement. However, the changes are not detected by currently used standard parameters which ar...
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Article
Numerical Simulations of Groove Topography Effects on Film Thickness and Friction in EHL Regime
The effects of depth and top width of transverse rectangular grooves on film thickness and friction in elastohydrodynamic lubrication (EHL) regime were investigated through numerical simulations. Results were ...
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Article
Novel Directional Blanket Covering Method for Surface Curvature Analysis at Different Scales and Directions
The curvature of surface topography is quantified in this study using a newly developed directional blanket covering curvature (DBCC) method. The novel method addresses a long-standing problem of a measurement...
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Article
Characterization of Surface Topography from Small Images
Detailed characterization of 3D engineering surface topographies is still an unresolved problem. The reasons are that the majority of the real surfaces are anisotropic and multi-scale, i.e. their directionalit...
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Article
Fractal Analysis of Surface Topography by the Directional Blanket Covering Method
A new method, called directional blanket covering (DBC) method, was developed in this study to quantify the roughness of surfaces in a multi-scale manner. Unlike the ASME and ISO standards on surface texture t...
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Article
Efficient Solution to the Cavitation Problem in Hydrodynamic Lubrication
Hydrodynamic lubrication is present in the majority of machinery where load is transmitted between two contacting surfaces in relative motion. Cavitation in liquid lubricating films is common and directly affe...
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Article
Evaluation of Discretisation and Integration Methods for the Analysis of Hydrodynamic Bearings With and Without Surface Texturing
Surface texturing has been demonstrated to improve tribological performance of hydrodynamic bearings. Because the texturing increases complexity of a surface, numerical methods are required. However, no compar...
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Article
Analysis of AFM Images of Self-Structured Surface Textures by Directional Fractal Signature Method
A new method, called augmented blanket with rotating grid (ABRG), has been proposed in our recent work on characterizing roughness and directionality of self-structured surface textures. This is the first meth...
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Article
Directional Multiscale Analysis and Optimization for Surface Textures
Surface texturing has a potential to become a cost effective and easy way to improve the tribological performance of lubricated interfacing surfaces. Effects of surface textures on the performance of machine e...
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Article
Directional Fractal Signature Analysis of Self-Structured Surface Textures
Currently available directional fractal signature (DFS) methods are not suited for self-structured surface textures since they base on the assumption of Brownian fractal or they do not use the entire image dat...
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Article
3-D Characterization, Optimization, and Classification of Textured Surfaces
Surface texturing is a new technology aiming at reducing friction in operating machinery. Different surface features of varying shape and density are artificially introduced onto the existing surfaces. The met...
