scholarly journals Influence of surface roughness parameters and surface morphology on friction performance of ceramics

2019 ◽  
Vol 127 (11) ◽  
pp. 837-842 ◽  
Author(s):  
Wei ZHANG ◽  
Seiji YAMASHITA ◽  
Takeshi KUMAZAWA ◽  
Fumihito OZEKI ◽  
Hideki HYUGA ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Roughness Parameters ◽  
Surface Roughness Parameters ◽  
Friction Performance

Research on the Surface Roughness Parameters of Micro-EDM

2013 ◽  
Vol 572 ◽  
pp. 281-286 ◽  
Author(s):  
Zhi Jie Chen ◽  
Ji Hong Shen ◽  
Yun Tao Dai
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Surface Topography ◽  
Evaluation Method ◽  
Micro Edm ◽  
Roughness Parameters ◽  
Surface Roughness Parameters ◽  
Evaluation Problem ◽  
Lubrication Characteristics ◽  
Morphology Characteristics

The surface topography errors of micro-EDM are mainly composed of surface roughness, surface waveness and so on. Research shows that the surface morphology provides a lot of useful information, which has serious influence on the friction and lubrication characteristics of the surface. However, for the micro-EDM surface topography evaluation problem, researchers have been using surface roughness parameters and evaluation method of mechanical process, which restrict the micro-EDM technology further development. On this account, the surface roughness parameters of micro-EDM have been deeply studied in this paper according to its technology characteristics and the surface morphology characteristics, therefore, the main researches and creative points are obtained, which the influence that the surface roughness of micro-EDM parts impact on their using performance is analyzed, and based on the surface morphology characteristics, some roughness evaluation parameters are given respectively according to peaks and valley, moreover, their numerical calculation are also gained.

Influence of surface functional parameters on friction behavior and elastic–plastic deformation of grinding surface in mixed lubrication state

2018 ◽  
Vol 233 (6) ◽  
pp. 870-883 ◽  
Author(s):  
Bin Zhao ◽  
Song Zhang ◽  
Jianfeng Li
Keyword(s):  
Surface Roughness ◽  
Surface Topography ◽  
Mixed Lubrication ◽  
Surface Model ◽  
Roughness Parameters ◽  
Solid Contact ◽  
Friction Behavior ◽  
Surface Roughness Parameters ◽  
Simulation And Experiment ◽  
Friction Performance

Mixed lubrication is a common lubrication regime in sliding contact and has received much attention in recent research. The influences of surface topography on friction performance in this lubrication state are significant owing to the coexistence of fluid–solid contact and solid–solid contact conditions. First, an accuracy surface model is built based on wavelet transform results. Then, the average Reynolds equation is revised for a grinding surface to be used in simulation. Third, four surface roughness parameters ( Sa, Sbi, S ci, and Svi) are selected to characterize surface topography. Additionally, the impacts on the solid–solid contact area, friction coefficient, and surface flattening are investigated. Finally, optimizations of surface roughness parameters directed toward energy saving and sliding stability are conducted and verified. Simulation and experiment methods are jointly applied to guarantee the accuracy of this research. The result of this study can provide theoretical support for machining contact surfaces.

scholarly journals The Metrology of Ground Concrete Surfaces Morphology With 3D Laser Scanner

2015 ◽  
Vol 6 (2) ◽  
pp. 40-44 ◽  
Author(s):  
Lukasz Sadowski ◽  
Thomas G. Mathia
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Mathematical Morphology ◽  
Open Problem ◽  
Laser Scanner ◽  
Roughness Parameters ◽  
Surface Roughness Parameters ◽  
3D Surface Roughness ◽  
Surface Morphologies ◽  
Abrasive Process

Abstract This paper is devoted to machining of concrete by grinding and the metrology of its surface morphologies. The surface morphology is still open problem from metrological as well as mathematical morphology points of views. In order to understand better abrasive process the raw morphologic state is compared with the ground concrete surfaces. The most significant results are presented in the form of profiles, 3D isometric views and isotropy analysis. Several 3D surface roughness parameters were calculated.

Effect of species and grinding disc distance on the surface roughness parameters of medium density fiberboard

2016 ◽  
Vol 75 (3) ◽  
pp. 335-346 ◽  
Author(s):  
Lidia Gurau ◽  
Nadir Ayrilmis ◽  
Jan Thore Benthien ◽  
Martin Ohlmeyer ◽  
Manja Kitek Kuzman ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Medium Density Fiberboard ◽  
Medium Density ◽  
Roughness Parameters ◽  
Surface Roughness Parameters

scholarly journals Sensitivity of C-Band SAR Polarimetric Variables to the Directionality of Surface Roughness Parameters

2021 ◽  
Vol 13 (11) ◽  
pp. 2210
Author(s):  
Zohreh Alijani ◽  
John Lindsay ◽  
Melanie Chabot ◽  
Tracy Rowlandson ◽  
Aaron Berg
Keyword(s):  
Surface Roughness ◽  
Soil Moisture ◽  
Laser Scanner ◽  
Careful Attention ◽  
Roughness Parameters ◽  
Retrieval Models ◽  
Surface Roughness Parameters ◽  
The Look ◽  
The Relationship ◽  
Roughness Measurements

Surface roughness is an important factor in many soil moisture retrieval models. Therefore, any mischaracterization of surface roughness parameters (root mean square height, RMSH, and correlation length, ʅ) may result in unreliable predictions and soil moisture estimations. In many environments, but particularly in agricultural settings, surface roughness parameters may show different behaviours with respect to the orientation or azimuth. Consequently, the relationship between SAR polarimetric variables and surface roughness parameters may vary depending on measurement orientation. Generally, roughness obtained for many SAR-based studies is estimated using pin profilers that may, or may not, be collected with careful attention to orientation to the satellite look angle. In this study, we characterized surface roughness parameters in multi-azimuth mode using a terrestrial laser scanner (TLS). We characterized the surface roughness parameters in different orientations and then examined the sensitivity between polarimetric variables and surface roughness parameters; further, we compared these results to roughness profiles obtained using traditional pin profilers. The results showed that the polarimetric variables were more sensitive to the surface roughness parameters at higher incidence angles (θ). Moreover, when surface roughness measurements were conducted at the look angle of RADARSAT-2, more significant correlations were observed between polarimetric variables and surface roughness parameters. Our results also indicated that TLS can represent more reliable results than pin profiler in the measurement of the surface roughness parameters.

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