...Shengnan Zhang; Ming Yan; Yushi Wang A methodology is proposed to study the interplay between tooth wear and contact fatigue under elastohydrodynamic lubrication condition. The modeling methodology includes the influence of contact fatigue on wear and the influence of wear on contact fatigue. First...

...Wei Wang; Wenhan Zhao; Qiang Ma; Ange Nsilani Kouediatouka; Hui Zhang; Guangneng Dong; Meng Hua; Hon-Yuen Tam The synergistic effect of surface texturing and lubricants with various viscosity and polarity properties is an attractive and unexplored topic. In this study, surface texturing...

..., the lubricating mathematical model of the DDHLS is established based on the perturbation method and solved by the finite difference method. The influences of the nut-radial-displacement, the nut-tilt, and the dual-drivable design on the transmission performance of the DDHLS are researched. The results show...

...A. Dindar; A. S. Chimanpure; A. Kahraman A tribo-dynamic model of ball bearings is proposed to predict their load-dependent (mechanical) power losses. The model combines (i) a transient, point contact mixed elastohydrodynamic lubrication (EHL) formulation to simulate the mechanics of the load...

... tribometer. The results show that TiC formed when Ti content in the coating was higher than 5.8 at% and the I D /I G ratios increased gradually with the increasing Ti content. Ti-DLC with 0.7 at% Ti had the highest H/E and H 3 /E 2 ratios and exhibited optimal tribological properties under lubrication...

... techniques to create texture features on orthopedic biomaterial surfaces and emphasize the key difficulties that must be overcome to produce textured prosthetic hip implants. Fig. 5 ( a ) Texture aspect ratio versus sliding parameter, identifying different lubrication regimes and showing individual...

...Yufu Xu; Jingyuan Yu; Yinghui Dong; Tao You; Xianguo Hu As a novel layered material, black phosphorus (BP) shows unexpected characteristics in many aspects including tribological application. In this work, BP was prepared through ball milling from red phosphorus (RP). The boundary lubricating...

...Yeau-Ren Jeng; Yao-Huei Huang; Ping-Chi Tsai; Gan-Lin Hwang An experimental investigation is performed into the tribological properties of mineral oil lubricants containing carbon nanocapsules (CNCs) additives with various concentrations (wt.%). Friction characteristics and wear behaviors...

... is made available for the reader of the paper. The model and the associated numerical solution method have significant advantages over today's most frequently used cavitation algorithms, which are based on Elrod–Adams pioneering work. cavitation tribology lubrication linear complementarity...

.... Editor: Robert L. Jackson. 24 10 2012 21 07 2013 Determining friction is as equally essential as determining the film thickness in the lubricated contact, and is an important research subject. Indeed, reduction of friction in the automotive industry is important for both...

... Z i = physical variables α = numerical constant β = numerical constant γ = numerical constant γ · = shear rate δ = numerical constant η = viscosity of the lubricant π i = dimensionless equations σ y = yield strength...

... presents a viscosity close that of the lubricant used by Crook. Therefore, it may be concluded that a contact temperature higher than 21.66 °C validates the liquid-state hypothesis. The work presented in this paper aimed to develop a simple temperature model exploitable within any thermal EHL modeling...

... 04 2011 20 12 2011 26 06 2012 27 06 2012 magnetism lubrication hydrodynamic rheology non-Newtonian Magnetorheological (MR) fluids have been in existence for many decades, the first US patent being generally attributed to Rabinow in 1947 as discussed by Carlson [( 1...

...Bassem A. Kheireddin; Vinay Narayanunni; Mustafa Akbulut This work deals with the effect of surface roughness parameters on the frictional properties of nanowire-based lubrication systems (NBLS) across Cu surfaces with various topographies. The friction coefficient was discussed in the context...

.... Compared with normal surfaces (316 stainless steel flat surfaces without any dimples or coatings), the frictional properties of such magnetic surfaces were investigated under different loads and sliding speeds when lubricated with ferrofluids using a friction test rig. Much attention was paid to the effect...

... that existing valve train friction models do not reliably predict friction in boundary and mixed lubrication conditions and are not sensitive to lubricant chemistry. In these conditions, the friction losses depend on the tribological performance of tribofilms formed as a result of surface–lubricant additive...

... lubrication regimes. However, papers focused on this particular aspect in face seals are rather scarce compared with those dealing with other popular sealing devices. The present study thus proposes a numerical flow model of mixed lubrication in mechanical face seals. It achieves this by evaluating...

...Vimala Manivasakan; Govindarajan Sumathi A theoretical investigation of the laminar squeeze flow of a couple-stress fluid between a flat circular static disk and an axisymmetric curved circular moving disk has been carried out using modified lubrication theory and microcontinuum theory...

...Dong Zhu; Q. Jane Wang Elastohydrodynamic Lubrication (EHL) is commonly known as a mode of fluid-film lubrication in which the mechanism of hydrodynamic film formation is enhanced by surface elastic deformation and lubricant viscosity increase due to high pressure. It has been an active...

...Andreas Almqvist; John Fabricius; Andrew Spencer; Peter Wall Different averaging techniques have proved to be useful for analyzing the effects of surface roughness in hydrodynamic lubrication. This paper compares two of these averaging techniques, namely the flow factor method by Patir and Cheng (P...