Correlation between surface roughness parameters and contact stress of gear

2020 ◽  
pp. 135065012092866
Author(s):  
Yang Duo ◽  
Tang Jinyuan ◽  
Zhou Wei ◽  
Wen Yuqin
Keyword(s):  
Surface Roughness ◽  
Shear Stress ◽  
Correlation Analysis ◽  
Maximum Shear Stress ◽  
Three Dimensional ◽  
Peak Height ◽  
Tooth Surface ◽  
Curvature Radius ◽  
Roughness Parameters ◽  
Surface Roughness Parameters

To reveal the relationship between rough tooth surface microstructure characteristics and contact performance, contact analysis is carried out based on the measured surface topography of the tooth surface of ultrasonic grinding by utilizing the elastic-plastic contact mechanics and statistical correlation analysis theory. Simple correlation analysis and partial correlation analysis are adopted for the gear three-dimensional surface roughness parameters and the maximum Mises stress and maximum shear stress. Then, the method of stepwise regression analysis and path analysis is used to construct the best fitting linear model of 3D roughness parameters and the maximum Mises stress and maximum shear stress, and the parameters’ decision coefficient is obtained. The research shows: (1) the rank of comprehensive influence factors of the maximum Mises stress is as follows: arithmetical mean height ( Sa), peak material portion ( Smr1), maximum peak height ( Sp), reduced peak height ( Spk), and minimum curvature radius and height ratio ( K), where Smr1, Spk, and K are negatively correlated with the maximum Mises stress; (2) the comprehensive influence variables of the maximum shear stress are in the order of Sa, Spk, and Vmp, among which Spk and Vmp are inversely related to the maximum shear stress.

scholarly journals Effect of gamma radiation on creep behavior, hardness and microstructure of Titanium dental material

2017 ◽  
pp. 5078-5084
Author(s):  
A. El Bediwi ◽  
Eman Kashita ◽  
Salah. M .M.Salman
Keyword(s):  
Surface Roughness ◽  
Shear Stress ◽  
Gamma Radiation ◽  
Stress Exponent ◽  
Creep Behavior ◽  
Vickers Hardness ◽  
Maximum Shear Stress ◽  
Dental Material ◽  
Roughness Parameters ◽  
Matrix Microstructure

Effect of gamma radiation with fixed doses on creep behavior, Vickers hardness, maximum shear stress and surface roughness parameters of cp Titanium have been investigated.  Vickers hardness and maximum shear stress values of cp Titanium are decreased after irradiated at 10, 20 and 30 kGy.  Surface roughness Ra of cp Titanium varied after irradiated at 10, 20 and 30 kGy.  Stress exponent values of cp Titanium decreased after irradiated at 10, 20 and 30 kGy.  Matrix microstructure of cp Titanium changed (Intensity, broadness and position) after irradiated at 10, 20 and 30 kGy.

Assessment of the Three-Dimensional Surface Roughness Parameters

2013 ◽  
Vol 274 ◽  
pp. 174-178 ◽  
Author(s):  
Bo Liu ◽  
Hai Yin Yu ◽  
Fan Ye ◽  
Jian Ying Guo
Keyword(s):  
Surface Roughness ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Mechanical Processing ◽  
Roughness Parameters ◽  
Surface Roughness Parameters ◽  
3D Surface Roughness ◽  
Improve Measurement ◽  
Roughness Assessment ◽  
Automatic Level

With the improvement of mechanical processing automatic level, the measurement of the surface roughness requires the ever-increasing demands, including the improvement of measurement methods, improve measurement accuracy and roughness parameters assessed. Around these requirements, this paper is the research to 3D surface roughness parameters, gives the method to determine the datum and 3D roughness assessment parameters.

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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