A study on the effects of surface dimple geometry on fretting fatigue performance

Choi, Youngsik; Lee, Joonwon

doi:10.1007/s12541-015-0094-1

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…Studies have shown that the diameter and depth of micro-textures are also important factors affecting the tribological properties of surface textures. 106 The research of Choi et al 107 is consistent with this. At the same time, Choi ‘s research also shows that the effect of micro-texture depth on the tribological properties of texture is greater than that of texture diameter.…”

Section: Effect Of Texture Geometry On Tribological Propertiessupporting

confidence: 67%

Research progress of surface texturing to improve the tribological properties: A review

Liu,

Yang,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the process of machine and mechanical operation, it is inevitable to face problems such as friction and wear. At present, there are many solutions to solve the problems. As a very effective method, surface texturing has been applied in many projects. In recent years, surface texturing has made great achievements in the study of friction pair surface, which is of great significance to improve the tribological properties of friction pair surface. In this paper, the author reviews the main research results of surface texturing in controlling friction in recent years and points out the research purpose and development status of surface texture. The preparation of texturing is summarized and analyzed from two aspects: shape and size control accuracy and surface quality. The research on the anti-friction mechanism of texture is reviewed, and the three states of dry friction, fluid lubrication, and boundary lubrication are analyzed, respectively. The optimization of morphology and parameters was discussed, and the optimal parameter range was obtained. Finally, the above aspects of the full text are summarized, and the problems faced by all aspects are put forward. Combined with the actual situation of the current research, the future development prospect of surface texture technology is prospected.

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Section: Effect Of Texture Geometry On Tribological Propertiessupporting

confidence: 67%

Research progress of surface texturing to improve the tribological properties: A review

Liu,

Yang,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Firstly, to connect one of suspected fall-in points with four vertices of an instantaneous sweeping quadrilateral respectively, and then calculate include angles between the two adjacent connecting lines according to Equation (14).…”

Section: Simulation Methods For Ball-end Trochoidal Milling Micro Surface Topographymentioning

confidence: 99%

“…An important aspect of surface quality, micro surface topography refers to the irregular micro geometry such as surface roughness, waviness, shape error, and texture [12], which not only affects surfaces' wear, lubrication state, friction coefficient, etc., but also other properties of the parts' contact state [13][14][15]. Trochoidal milling has complex trajectories and consequently forms micro surfaces via complicated mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Micro Surface Topography from Ball-End Milling in a Trochoidal Milling Mode

Dong

Zhang

et al. 2021

Micromachines

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The trochoidal milling mode is widely used in high-speed machining, and due to good adaptability and flexible posture adjustment, ball-end milling cutters are conducive to complex surface machining with this mode. However, the processes of material removal and formation of machined micro surfaces are very difficult to describe as the profile of cutter teeth is complex and the trajectory direction changes continuously during the trochoidal milling process. A modeling method for the generation of micro surface topography of ball-end milling in the trochoidal milling mode is put forward. In this method, the locus equation of each cutter tooth is established based on the principle of homogeneous coordinate transformation, after which a Z-MAP algorithm is designed to simulate the micro surface topography. The Z-MAP algorithm can quickly obtain the part grid nodes potentially swept by the cutter tooth within a unit time step through the establishment of servo rectangular encirclement and instantaneous sweeping quadrilateral of the element of cutter teeth; the part grid nodes actually swept are further determined through an angle summation method, and the height coordinate is calculated with the method of linear interpolation according to Taylor’s formula of multivariate functions. Experiments showed that the micro surface topography resulting from ball-end milling in the trochoidal milling mode had high consistency with the simulation, which indicates that the proposed method can predict micro surface topography in practical manufacturing. In addition, a comparison of micro surface topography between trochoidal milling and ordinary straight-linear milling was conducted, and the results showed that the former was overall superior to the latter in resulting characteristics. Based on this conclusion, the influences of cutting parameters of ball-end trochoidal milling on surface characteristics, particularly amplitude and function, were analyzed according to the simulated micro surface topography data.

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“…The surface texture mainly improves the oil film bearing capacity through the difference in oil film pressure between the inlet and outlet of lubricating oil. Texture depth is an important parameter [45][46][47] that affects the surface tribological performance and plays a decisive role in the load-bearing capacity of the lubricating film. Mazuyer et al [48] found that if the surface texture depth is shallow, it will lead to a local decrease in the thickness of the lubricating film, which is consistent with the research results of Kaneta et al [49].…”

Section: Stepped Structure Texturementioning

confidence: 99%

Study on the mixed lubrication of rough planar extrusion considering surface texture

Su,

Shao,

Tang

et al. 2024

Surf. Topogr.: Metrol. Prop.

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Surface texture plays a crucial role in fluid dynamic lubrication. The non-Newtonian thermal elastohydrodynamic lubrication problem involving rough surfaces with texture has not been investigated to date. In this paper, a model for non-Newtonian thermal elastohydrodynamic lubrication incorporating rough surfaces and texture morphology is developed, focusing on the problem of mixed lubrication in planar extrusion with texture. The model builds upon the Reynolds equation with flow factor introduced. It considers the effects of rough surface texture, thermal effects, and non-Newtonian effects. The Reynolds equation is numerically solved using the Semi-System method to calculate the oil film pressure in full film region and contact pressure in dry contact area. The DC-FFT algorithm is employed to calculate surface elastic deformation. Comparing the calculated friction coefficient of the present model with the measured values in literature experiments, the average error is only 6.94%. Furthermore, the study investigates the effects of texture, temperature, and non-Newtonian on interfacial lubrication performance under mixed lubrication conditions. It’s found that compared to untextured surface, the average film thickness of textured surface increased by a maximum of 10.8%, and the friction coefficient decreased by a maximum of 67.4%; Compared to Newtonian fluids, shear thinning fluids reduce temperature by 0.18%, and shear thickening fluids are more conducive to improving mixed lubrication performance. A stepped pit texture is designed based on the dynamic pressure mechanism of the texture, indicating that the circular stepped pit texture has the best load-bearing capacity improvement.

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A study on the effects of surface dimple geometry on fretting fatigue performance

Cited by 10 publications

References 13 publications

Research progress of surface texturing to improve the tribological properties: A review

Research progress of surface texturing to improve the tribological properties: A review

Modeling and Analysis of Micro Surface Topography from Ball-End Milling in a Trochoidal Milling Mode

Study on the mixed lubrication of rough planar extrusion considering surface texture

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