... and subsurface layers. This work addresses the influence of selected deep rolling parameters (pressure, speed, feed, and number of passes) on the surface integrity (roughness, surface and subsurface microhardness, and microstructure) of AISI 1020, AISI 1065, and AISI 1080 carbon steels. Deep rolling...

... may compromise the friction. This paper reports on wetting, dry friction, and roughness properties of TiO 2 coated (hydrophilic) and polymethyl hydrogen siloxane (PMHS) coated (hydrophobic) self-cleaning ceramic tiles. The coefficient of friction values of the tile–rubber interface do not change...

...Santanu Sardar; Susanta Kumar Pradhan; Santanu Kumar Karmakar; Debdulal Das Tribological characterizations of composites are primarily focused on the evaluation of wear resistance (WR) and/or the coefficient of friction, although roughness of abraded surfaces (RASs) is one of the key factors...

...A. Jourani The comparison between elastic and elastoplastic models is also discussed in order to investigate the effect of mode of surface deformation on real area of contact and pressure distribution. The wide range of scales of roughness and waviness influence the local contact parameters...

..., a depth of 10 μm, and a spacing of 360 μm, the R ku increased to 12.3 and the R sk decreased to −2.7. 24 12 2011 17 04 2012 21 08 2012 21 08 2012 surface texturing roughness coefficient of friction boundary lubrication Many machine components operate under...

...Huaiju Liu; Ken Mao; Caichao Zhu; Xiangyang Xu The unified approach based upon the Reduced Reynolds technique is applied to develop a deterministic transient mixed lubrication line contact model. This model is used in spur gear applications to comprehensively show effects of roughness, working...

...Kyosuke Ono A new numerical method of analyzing adhesive contact mechanics between a sphere and a flat with sub-nanometer roughness is presented. In contrast to conventional theories, the elastic deformations of mean height surfaces and contacting asperities, and Lennard-Jones (LJ) surface forces...

... the influence of roughness on the performance of the seal. The choice of a deterministic approach has been made, this being justified by a review of the literature. A numerical model for the generation of random rough surfaces has been used prior to the flow model in order to give an accurate description...

... transmit substantial power under heavy loading conditions that may possibly induce plastic deformation of contacting surfaces. Moreover, the roughness of machined surfaces is usually of the same order of magnitude as, or greater than, the average EHL film thickness. Consequently, most components operate...

...Noël Brunetière; Bernard Tournerie The aim of this paper is to present a turbulence model that allows turbulent flows between smooth and/or rough walls to be dealt with. After analyzing available literature data, an improvement of the Elrod, Ng, and Pan turbulence model is proposed, taking...

... by a rough surface contact. This model is based on the Boussinesq–Cerruti integral equations, which relate surface tractions to displacements. The materials are assumed to respond elastic perfectly plastically for simplicity, and the localized hardness and shear strength are set as the upper limits...

...A. Kadiric; R. S. Sayles; E. Ioannides A numerical model designed to simulate a moving line contact of two rough layered bodies is presented. Fourier transforms are used to obtain fundamental solutions to relevant differential equations and then these solutions are used as kernel functions...

...Osama M. Abuzeid; Peter Eberhard The objective of this study is to construct a continuous mathematical model that describes the frictionless contact between a nominally flat (rough) viscoelastic punch and a perfectly rigid foundation. The material’s behavior is modeled by assuming a complex...

...Sudipto Ray; S. K. Roy Chowdhury In view of the difficulty in measurement of flash temperature rise at the contact between rough sliding bodies a good deal of work has been carried out in the last few decades to predict flash temperatures theoretically. However, as surfaces become smoother...

...A. D. Chapkov; C. H. Venner; A. A. Lubrecht Over the last decade, the operating conditions of the Elastohydrodynamic lubricated (EHL) contact have become increasingly severe. Consequently, the average film thickness decreased and became comparable to the surface roughness. Under those conditions...

...C. J. Hooke; K. Y. Li Using modern EHL programs it is relatively simple to determine the pressures and clearances in rough EHL contacts. The pressures may then be used to calculate the subsurface stresses in the two contacting components. However, the results depend on the assumptions made about...

...A. Hariri; J. W. Zu; R. Ben Mrad The asperities of rough surfaces have long been considered to be points higher than their immediate neighbors. Based on this concept, theories were developed for quantitatively understanding the elastic and plastic nature of contact between rough surfaces. Recently...

...Jeng Luen Liou; Jen Fin Lin Instead of a general consideration of the fractal dimension ( D ) and the topothesy ( G * ) as two invariants in the fractal analysis of surface asperities, these two roughness parameters in the present study are varied by changing the mean separation ( d * ) of two...

...Chengqing Yuan; Zhongxiao Peng; Xinping Yan Surface characterization, particularly roughness analysis, is very important for a wide range of applications including wear assessment. This paper proposes a set of methods and techniques to acquire appropriate images using confocal laser scanning...

...Sum Huan Ng; C. Fred Higgs,, III; Inho Yoon; Steven Danyluk Pressure and shear flow factors (Patir and Cheng, 1978) were used to take into account the roughness of the pad surface in the modeling of the interfacial fluid pressure during chemical mechanical polishing. An attempt was made to explain...