Influence of dimple shape on tribofilm formation and tribological properties of textured surfaces under full and starved lubrication

Xu, Yufu; Zheng, Quan; Abuflaha, Rasha; Olson, Dustin; Furlong, Octavio Javier; You, Tao; Zhang, Qiangqiang; Hu, Xianguo; Tysoe, Wilfred T.

doi:10.1016/j.triboint.2019.03.047

Cited by 77 publications

(37 citation statements)

References 44 publications

(46 reference statements)

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“…However, different effects of groove orientation can be obtained for other operating parameters, such as the contact pressure. The authors of papers [ 128 , 129 , 130 , 131 , 132 ] found that ellipsoidal dimples should be positioned perpendicularly to the sliding direction to improve tribological properties. Qiu et al [ 128 ] obtained the highest load-carrying capacity under gas-lubricated sliding for the ellipsoidal oil pockets oriented orthogonally to the direction of motion.…”

Section: Spatial Parametersmentioning

confidence: 99%

“…Lu and Khonsari [ 130 ] obtained better tribological performance of elliptical dimples over circular ones under mixed lubrication. Oval dimples oriented perpendicularly to the sliding direction can lead to a decrease in the coefficient of friction in starved lubrication under reciprocating motion; however, the results depend on the ratio of the major to the minor axes of the ellipse [ 131 ]. The elliptical dimples showed the friction reduction up to 30%; compared with behaviour of untextured specimens in reciprocating motion, squared and circular oil pockets offered a smaller reduction [ 132 ].…”

Section: Spatial Parametersmentioning

confidence: 99%

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Functional Importance of Surface Texture Parameters

2021

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Areal 3D analysis of surface texture gives more opportunities than a study of 2D profiles. Surface topography evaluation, considered as 3D dimensional analysis in micro or nanoscales, plays an important role in many fields of science and life. Among many texture parameters, those connected with height are the most often used. However, there are many other parameters and functions that can provide additional important information regarding functional behaviour of surfaces in different applications. The knowledge about the functional importance of various surface properties is low. This review tries to fill this gap. Surface texture parameters are presented in various groups: height, spatial, hybrid, functional, feature, and others. Based on experiences of the present authors and literature review, the relationships among various surface parameters and functional properties are described. A proposal of a selection of parameters on the basis of their functional significations is provided. Considerations for future challenges are addressed.

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Section: Spatial Parametersmentioning

confidence: 99%

Section: Spatial Parametersmentioning

confidence: 99%

Functional Importance of Surface Texture Parameters

2021

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“…For the reason of micro-reservoirs of lubricating oil, micro-hydrodynamic perturbations (increasing total load carrying capacity) and wear debris trapping roles, surface texture has a significant effect on friction and wear properties, but this effect has various trend under different working conditions. 34 Figure 3 shows the variation trend of friction coefficient with the increase in Hertz contact pressure from 0.819 to 2.00 GPa when the SRs are 5% and 25%, respectively. The friction coefficient decreases with the increase in Hertz contact pressure between the contact surfaces, and this decreasing trend is evident at high entrainment velocity.…”

Section: Analysis Of Test Resultsmentioning

confidence: 99%

Influence of surface topography on the friction and dynamic characteristics of spur gears

Wang

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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As an important excitation source of gear dynamic problems, the time-varying friction of tooth surface is closely related to its topography. Considering the friction characteristics of tooth surface is of great significance to improve the calculation accuracy of gear dynamic characteristics. In order to solve the problem that the variation of tooth friction coefficient was simplified too much in the previous gear dynamics research, the time-varying tooth friction coefficient is obtained by fitting the results of twin-disc test in this research. To investigate the influence of tooth surface topography on the friction and dynamic characteristics of spur gears, the relationship between surface topography and friction coefficient under line contact condition is studied using twin-disc tester and analyzed by 3D topography parameters in ISO 25178. The time-varying friction coefficients of spur gears with different tooth surface topographies during meshing are fitted with the experimental results. The influence of time-varying friction coefficient caused by the tooth surface topography on the dynamic characteristics of spur gears under different operating conditions is examined by substituting the fitting curves of time-varying friction coefficient into the multi-degree-of-freedom dynamic model of spur gears. The results show that this influence is mainly embodied in the off-line-of-action direction, which is the direction of friction force acting on the tooth surface. The dynamic characteristics of gears with different surface topography are obviously different under various working conditions. The method presents in this paper simplifies the application of tooth contact analysis in the study of time-varying tooth friction characteristics, which will provide a new way for the gear dynamics research considering the tooth surface topography.

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“…In the current research, the main consideration for the application of texture is the influence of related parameters, and different texture parameters are designed for different application scenarios. For example, in Xu et al's [32][33][34][35][36] research, the application of different texture parameters in cylinders was studied, and friction and wear tests were carried out on the textured elements using a friction and wear machine. e research results provided a good understanding for the lubrication mechanisms of different textured surfaces.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring‐Sleeve Friction Pair of Hydraulic Cylinders

Wang

Liu

Chen

et al. 2021

Advances in Materials Science and Engineering

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The surface texture, a major way to decrease friction and wear of the cylinder-piston ring friction pair, was conducted on cylinder-piston ring friction pair specimen using the orthogonal experimental design method to investigate the effect of different texture parameters (size, depth, shape, and surface density) of the friction and wear characteristics. Through simulation analysis, the texture parameters that affect the friction and wear characteristics are obtained. Using the evaluation method of friction coefficient and mass wear rate, the influence sequence and optimal values of texture parameters that affect friction and wear characteristics are obtained through range analysis. The results show that, after surface texture treatment under mixed lubrication conditions, the friction characteristics of the friction pair have changed and the friction coefficient and friction and wear rate have been significantly reduced. The results show that the triangular texture has a good antifriction effect, the texture depth is deepened, and the surface density and the size increases have a positive effect on the improvement of friction and wear. An ultra-depth microscope was used to observe the wear morphology of the friction and wear tests. The results show that the weakening of the third body wear by the texturing treatment and the maintenance of oil lubrication are the main reasons for reducing friction and wear.

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Influence of dimple shape on tribofilm formation and tribological properties of textured surfaces under full and starved lubrication

Cited by 77 publications

References 44 publications

Functional Importance of Surface Texture Parameters

Functional Importance of Surface Texture Parameters

Influence of surface topography on the friction and dynamic characteristics of spur gears

Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring‐Sleeve Friction Pair of Hydraulic Cylinders

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