scholarly journals Evaluation of Surface Fatigue Sbength Based on Surface Temperature : Surface Temperature Calculation for Rolling-Sliding Contact

1999 ◽  
Vol 65 (630) ◽  
pp. 732-737
Author(s):  
Gang DENG ◽  
Tsutomu NAKANISHI
Keyword(s):  
Surface Temperature ◽  
Sliding Contact ◽  
Temperature Calculation ◽  
Surface Fatigue ◽  
Temperature Surface

Surface Temperature Calculation and its Application for the Surface Fatigue Strength Evaluation of Rollers

2000 ◽  
Author(s):  
Gang Deng ◽  
Tsutomu Nakanishi ◽  
Hironori Ikeda
Keyword(s):  
Fatigue Strength ◽  
Surface Temperature ◽  
Gear Tooth ◽  
Tooth Surface ◽  
Measured Temperature ◽  
Sliding Velocity ◽  
Strength Evaluation ◽  
Rolling Velocity ◽  
Temperature Calculation ◽  
Surface Fatigue

Abstract Surface temperature is resulted by not only the load and dimension at the contact point but also the sliding velocity, rolling velocity, surface roughness, lubrication condition and etc. So, the surface fatigue strength of such as roller and gear may be evaluated more exactly and simply by use of the surface temperature or an index including the surface temperature than the Hertzian stress. In this research, the surface temperatures of rollers in different rolling and sliding conditions were measured with a thermocouple. The effects of the load P, mean velocity Vm and sliding velocity Vs on the surface temperature are clarified. An experimental formula, which expresses a linear relationship between the surface temperature and the P0.86Vs1.31Vm−0.83 value, is presented to calculate the surface temperature. This formula is also confirmed available for the gear tooth surface temperature calculation by comparison of calculated temperature and the measured temperature on the gear tooth surface. The relationship between the surface temperature and the number of load cycles of rollers are investigated, the necessity and rationality of the surface fatigue strength evaluation considering the surface temperature are discussed.

scholarly journals The Influence of Pulling Up on Micropitting Location for Gears with Interference Fit Connections of Their Conical Surface

Coatings ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1224
Author(s):  
Layue Zhao ◽  
Yimin Shao ◽  
Minggang Du ◽  
Yang Yang ◽  
Jixuan Bian
Keyword(s):  
Boundary Lubrication ◽  
Gear Tooth ◽  
Sliding Contact ◽  
Conical Surface ◽  
Dynamic Loads ◽  
Interference Fit ◽  
Bending Fatigue ◽  
Lubrication Regimes ◽  
Surface Fatigue ◽  
Reducing Gear

Micropitting is a surface fatigue phenomenon that occurs in Hertzian type of rolling and sliding contact that operates in elastohydrodynamic or boundary lubrication regimes and can progress both in terms of depth and extent. If micropitting continues to propagate, it may result in reducing gear tooth accuracy, increasing dynamic loads and noise. Eventually, it can develop into macropitting and other modes of gear failure such as flank initiated bending fatigue. Micropitting has become a particular problem in the gear surface fatigue. Usually micropitting initiates in the dedendum of the driver and driven at the asperities on the surface. However, the authors found for some gears with interference fit connections of their conical surface, micropitting on the pinion occurs in the addendum. This study attempted to find the reason using a 3D–TCA method based on ISO/TR 15144-1 to predict the micropitting and try to understand the key influence likely to affect micropitting location.

Temperature Rise at the Sliding Contact Interface for a Coated Semi-Infinite Body

1993 ◽  
Vol 115 (1) ◽  
pp. 1-9 ◽  
Author(s):  
X. Tian ◽  
F. E. Kennedy
Keyword(s):  
Surface Temperature ◽  
Temperature Rise ◽  
Peclet Number ◽  
Integral Transform ◽  
Sliding Contact ◽  
Contact Interface ◽  
Péclet Number ◽  
Maximum Surface ◽  
Semi Empirical ◽  
Maximum Surface Temperature

In this paper, a three-dimensional model of a semi-infinite layered body is used to predict steady-state maximum surface temperature rise at the sliding contact interface for the entire range of Peclet number. A set of semi-empirical solutions for maximum surface temperature problems of sliding layered bodies is obtained by using integral transform, finite element, heuristic and multivariable regression techniques. Two dimensionless parameters, A and Dp, which relate to coating thickness, contact size, sliding speed and thermal properties of both coating and substrate materials, are found to be the critical factors determining the effect of surface film on the surface temperature rise at a sliding contact interface. A semi-empirical solution for maximum surface temperature problems of homogeneous bodies, which covers the whole range of Peclet number, is also obtained.

The Surface Temperature of a Half-Plane Subjected to Rolling/Sliding Contact With Convection

2000 ◽  
Vol 122 (4) ◽  
pp. 864-866 ◽  
Author(s):  
F. D. Fischer ◽  
E. Werner ◽  
K. Knothe
Keyword(s):  
Integral Equation ◽  
Surface Temperature ◽  
Half Plane ◽  
Volterra Integral Equation ◽  
Fast Moving ◽  
Laplace Transformation ◽  
Sliding Contact ◽  
Transformation Technique ◽  
Analytical Expression

Based on earlier works by the authors an analytical expression for the surface temperature of a halfplane heated by fast moving rolling/sliding contact and cooled by convection on the surface of the halfplane is presented by applying the Laplace transformation technique and the solution of a Volterra integral equation of the second kind. [S0742-4787(00)00604-4]

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