Design and wear resistance analysis of bionic roller for folding of automobile body cover parts based on pearl shell surface texture

2020 ◽  
Vol 8 (4) ◽  
pp. 045027
Author(s):  
Bang-Cheng Zhang ◽  
Zi-Qiang Zhang ◽  
Jian-Wei Sun ◽  
Chen Shao
Keyword(s):  
Wear Resistance ◽  
Surface Texture ◽  
Shell Surface ◽  
Resistance Analysis ◽  
Automobile Body

A GEOMETRICAL SURFACE TEXTURE STUDY OF CYCLOID DRIVE DISCS AFTER BENCH TESTS

Tribologia ◽  
2021 ◽  
Vol 297 (3) ◽  
pp. 27-33
Author(s):  
Krzysztof Olejarczyk ◽  
Marek Kalbarczyk
Keyword(s):  
Wear Resistance ◽  
Working Conditions ◽  
Surface Texture ◽  
Potential Application ◽  
Bench Test ◽  
Roughness Parameters ◽  
Bench Tests ◽  
Lubrication Film ◽  
Test Parameters ◽  
Before And After

The article presents the results of a geometrical surface texture study of cycloid drive discs after bench tests. For this purpose, the working surfaces, such as peak and valley areas of the epicycloid and the holes inner surfaces of both discs, were investigated using contact profilometry. From each surface, a transverse profiles were extracted, before and after 50 cycles of bench test. The discs and the profiles were examined for signs of wear and roughness changes. For each profile, the Ra and Rz roughness parameters were determined. On the base of the obtained profiles and the values of roughness parameters, it can be stated that the assumed test parameters provide stable working conditions, with an uninterrupted lubrication film, which results in practically negligible and unmeasurable wear. Taking into account the operating specification of a helicopter winch as an example of potential application of the presented cycloidal drive, the developed solution fulfils the requirements concerning wear resistance.

Wear Resistance Analysis of a Lightweight Aluminum Alloy Sheet Friction Stir Joint Area

2020 ◽  
Vol 52 (4) ◽  
pp. 565-572
Author(s):  
H. F. Wang ◽  
D. W. Zuo ◽  
S. R. Liu ◽  
J. F. Pu ◽  
W. W. Song
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Friction Stir ◽  
Resistance Analysis ◽  
Joint Area

Fretting friction properties of laser surface texture microfilaments

2019 ◽  
Vol 72 (3) ◽  
pp. 427-431
Author(s):  
Ke Li ◽  
Xiuping Dong ◽  
Mingji Huang ◽  
Ping Chen
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Surface Texture ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Textured Surface ◽  
Wear Depth ◽  
Content Type ◽  
Texture Density ◽  
Metal Rubber

Purpose This paper aims to improve the wear resistance of metal rubber microfilaments and the service life. The effect of surface texture by laser processing on the fretting friction properties of metal rubber microfilaments was studied. Design/methodology/approach The LQL-F20A laser marking machine was used to fabricate a ring groove array with equal spacing and dense arrangement on the surface of metal rubber microfilaments. The test was carried out with a self-made micro-dynamic frictional tester. The topography of the microfilaments was observed by scanning electron microscopy and analyzed. Findings It has shown that laser surface texturing can improve the wear performance of microfilaments. Under the same experimental conditions, the microfilaments of textured surface has a smaller depth of wear than un-textured specimen. The wear resistance increases with the increase of texture density. The friction coefficient of textured specimen is significantly reduced compared with un-textured specimen, and the surface texture density of microfilaments has little influence on the friction coefficient after stabilization. In the stage of stable fretting wear, the wear depth will be more with the increase of the load. Originality/value There is little research on metal rubber microfilaments tribological properties. In this paper, the effect of laser texturing of microfilaments on micro-dynamic friction properties was studied by friction machine to provide a reference for the application of metal rubber in aerospace, medical and other fields.

Wear Resistance Analysis of Plateau Honing Surface for Ceramics Mg-PSZ

2001 ◽  
Vol 202-203 ◽  
pp. 299-302
Author(s):  
Ai Bing Yu ◽  
Yan Fei Tan ◽  
Bin Lin ◽  
Yan Shen Xu ◽  
Xin Li Tian
Keyword(s):  
Wear Resistance ◽  
Resistance Analysis

Designing a Bioinspired Surface for Improved Wear Resistance and Friction Reduction

2021 ◽  
pp. 1-19
Author(s):  
Julia Hoskins ◽  
Min Zou
Keyword(s):  
Wear Resistance ◽  
Surface Texture ◽  
Friction And Wear ◽  
Wear Track ◽  
Wear Behavior ◽  
Friction Reduction ◽  
Loading Conditions ◽  
Track Width ◽  
Friction And Wear Behavior ◽  
Average Wear

Abstract This study used 2-photon 3D lithographic printing and replica molding to fabricate a micro-texture based on the Ocellated Skink. The fabricated surface texture was studied for friction and wear behavior using linear reciprocating tribological tests with a chrome steel ball counterface under various loading conditions and compared to samples fabricated with the same methods without a surface texture. The texture was found to decrease friction at low loads and provide steady friction under all loading conditions. The textured samples also decreased the average wear track width up to 61%. Wear was reduced on surfaces by the texture through the controlled formation of microcracking, which both reduced the amount of debris built up on samples and effectively reduced the worn area.

Computational modelling based wear resistance analysis of thick composite coatings

2014 ◽  
Vol 72 ◽  
pp. 13-30 ◽  
Author(s):  
K. Holmberg ◽  
A. Laukkanen ◽  
A. Ghabchi ◽  
M. Rombouts ◽  
E. Turunen ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Computational Modelling ◽  
Resistance Analysis

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

A TEM study of the microstructure of avian eggshells

1992 ◽  
Vol 50 (2) ◽  
pp. 1102-1103
Author(s):  
S. Q. Xiao ◽  
S. Baden ◽  
A. H. Heuer
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Nucleation And Growth ◽  
Growth Mechanisms ◽  
Shell Surface ◽  
Thin Sections ◽  
Polycrystalline Metals ◽  
Transmission Electron ◽  
Nucleation And Growth Mechanisms

The avian eggshell is one of the most rapidly mineralizing biological systems known. In situ, 5g of calcium carbonate are crystallized in less than 20 hrs to fabricate the shell. Although there have been much work about the formation of eggshells, controversy about the nucleation and growth mechanisms of the calcite crystals, and their texture in the eggshell, still remain unclear. In this report the microstructure and microchemistry of avian eggshells have been analyzed using transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS).Fresh white and dry brown eggshells were broken and fixed in Karnosky's fixative (kaltitanden) for 2 hrs, then rinsed in distilled H2O. Small speckles of the eggshells were embedded in Spurr medium and thin sections were made ultramicrotome.The crystalline part of eggshells are composed of many small plate-like calcite grains, whose plate normals are approximately parallel to the shell surface. The sizes of the grains are about 0.3×0.3×1 μm3 (Fig.l). These grains are not as closely packed as man-made polycrystalline metals and ceramics, and small gaps between adjacent grains are visible indicating the absence of conventional grain boundaries.

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