Influence of surface roughness on the friction property of textured surface

Zhou, Yuankai; Zhu, Hua; Zhang, Wenqian; Zuo, Xue; Li, Yan; Yang, Jianhua

doi:10.1177/1687814014568500

Cited by 37 publications

(21 citation statements)

References 32 publications

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“…The results showed that both the surface texture and surface roughness play important roles, and friction reduction effect of the textured surface varies under different surface roughness. Zhou et al 6 investigated the influence of the surface roughness on friction property of the textured surface using the method of the computational fluid dynamics. Their results suggested that the load-carrying capacity is closely related to surface texture, surface roughness, and the interaction between them.…”

Section: Introductionmentioning

confidence: 99%

The comprehensive effect of surface texture and roughness under hydrodynamic and mixed lubrication conditions

Duan

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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A theoretical study is carried out to investigate the comprehensive effect of the machined roughness and fabricated textures, by solving the average Reynolds equation coupled with a mass-conservative cavitation algorithm and taking into account asperity contact. We analyzed the influence of surface roughness, which is represented by the combined root-mean-square roughness σ and surface pattern parameter γ on the optimum texture parameters including the dimple depth-over-diameter ratio and area density under hydrodynamic and mixed lubrication conditions. The results show that the effect of surface roughness on load-carrying capacity can be ignored under hydrodynamic lubrication condition. Furthermore, the optimum texture parameters under hydrodynamic lubrication condition and the optimum dimple depth-over-diameter ratio under mixed lubrication condition are determined at minimized friction coefficient, which can be taken as the same for smooth-textured surface and rough-textured surface. The corresponding minimum friction coefficient increases with increasing σ and γ, and decreasing dimple area density under mixed lubrication condition.

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Section: Introductionmentioning

confidence: 99%

The comprehensive effect of surface texture and roughness under hydrodynamic and mixed lubrication conditions

Duan

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…This means that a well-controlled tangential displacement and less drift are obtained. The literature shows that textured surfaces can reduce friction [67,68], and, as a result, the tangential displacement will also be reduced. Experiments in which the drift is measured at textured surfaces should be performed.…”

Section: Recommendationsmentioning

confidence: 99%

Pre-sliding behaviour of multi asperity ceramic contacts

Winogrodzka¹

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functioning of high-tech mechatronic systems. The tribological behaviour of sliding contacts in such mechanisms plays an important role in the performance of these systems. The geometrical changes of the surfaces, where geometry is defined as a multi asperity contact, will influence the frictional behaviour. This thesis focuses on the pre-sliding and sliding behaviour of contacts with the aim of determining the parameters which influence the errors in positioning accuracy.The single asperity contact is the first step in understanding the pre-sliding behaviour between two elements. It is from this model that the tangential displacement is calculated, based on an applied normal load and the coefficient of friction. The normal load can be constant, either increasing or decreasing; this will depend on the operating conditions within the application. Adhesion plays an important role in a single asperity contact, whilst for a multi asperity contact adhesion can often be ignored.This thesis introduces the test setup, which consists of a confocal height sensor for surface roughness measurement and a confocal Raman spectroscopy setup for chemical changes in the contact. Using this setup, it is possible to analyse the formation of chemical transfer layers as well as any geometrical changes in the wear track.The single asperity contact model shows good agreement with the experimental work performed for silicon and silica against glass. With respect to high and low SUMMARYvii contact pressures, (< 100 MPa) the Mindlin theory can be used to predict pre-sliding behaviour. However, at very low loads the adhesion starts to significantly affect the results.The pre-sliding behaviour of multi asperity contact, so rough surfaces, can be described on the basis of results obtained from theoretical calculations and experiments. The calculation of the tangential displacement for rough surfaces is presented in this thesis. The main assumption in the model presented is that rough surfaces can be modelled as a set of Hertzian contacts, where each asperity has its own radius and summit height. One asperity with a maximum value of tangential displacement will determine when a multi asperity contact starts sliding. The asperities will have no mutual influence apart from sharing the total tangential and normal load. Calculations for different applied loads, surface roughness and autocorrelation lengths show that roughness plays an important role in the preliminary displacement.In the design of surfaces for positioning accuracy, parameters such as surface roughness, applied normal load and tangential load should be taken into account. In het ontwerp van oppervlakken ten behoeve van positioneringsnauwkeurigheid is het belangrijk dat ten eerste de drift minimaal is en dat daarnaast het contact zo stabiel mogelijk zal opereren, ook bij eventuele veranderingen. Getextureerde oppervlakken, bestaande uit regelmatige structuren, zijn beter in staat om drift te minimaliseren dan random ruwe oppervlakken. Berekeningen laten zien dat een oppervlakte sam...

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“…Kadleckova and co-workers [2] reported that with the multistep etching process, the aluminumalloy substrate can be effectively modified and textured to the same morphology, regardless of the initial surface roughness. In [3] the authors investigated the effects of surface roughness on the tribological properties of a textured surface. Their investigations show that in contrast with dimple textures, surface roughness is a texture at the micro-level, which will essentially influence the load-bearing capacity of lubricant film.…”

Section: Introductionmentioning

confidence: 99%