Combined Thermal - Mechanical Effects in Frictional Sliding

Azarkhin, A.; Barber, J. R.; Rolf, Richard L.

doi:10.4028/www.scientific.net/kem.33.135

Cited by 19 publications

(7 citation statements)

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“…It has been recognized that frictional heating of asperity contact and viscous shearing heat of lubricant will result in temperature rise and surface thermoelastic deformation. Thermo-elastic analyses of smooth surface contacts or asperity contacts have indicated the importance of thermal analysis to contact studies [7,8]. The two and three-dimensional thermo-mechanical asperity contact model for two nominally flat surfaces in dry contact [9][10][11] show that the frictional heat can cause asperities to grow and that the contact pressure, real contact area, and the subsurface stresses are different from those analysed with an isothermal asperity contact model.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermo-elastic deformation on lubricated point contacts

Wang

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part J:

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In lubricated contacts, viscous shearing of lubricant and frictional heating inevitably result in thermo-elastic deformation of contacting surfaces, which will change the distribution of contact pressure, and hence affect the behaviour of the contact. This study presents a thermomechanical model for lubricated point-contacts problem. The model takes into account the interactions between pressure and temperature, and asperity distortion due to thermal and elastic deformations. A unified Reynolds equation system is used to obtain the pressure distribution, and an FFT-based algorithm is applied to speed up the calculation of temperature rise and surface deformations caused by the normal pressure and surface temperature rise. The results show that interfacial frictional heating results in thermo-elastic deformation comparable with elastic deformation. As a result, the gap between mating surfaces will be decreased, and the pressure near the centre of contact will be elevated, especially for rough surface and high speed.

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Section: Introductionmentioning

confidence: 99%

Effect of thermo-elastic deformation on lubricated point contacts

Wang

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…As the dimensionless parameter H 0 in Eq. (12) is almost equal to unity for most metallic materials (20) , we assume H 0 =1. From the result of fatigue experimental test as shown in Fig.5, we assumed the threshold value of the stress intensity factor is K Ith =4MPa.m 0.5 , hence the threshold value of energy release late is Actually, before the crack propagation, the crack initiation should be considered.…”

Section: Numerical Examples Of Stress Intensity Factors For a Single mentioning

confidence: 99%

Fatigue Crack Growth Behavior of Subsurface Crack in a Semi-Infinite Body Due to Rolling-Sliding Contact

Mizoguchi

Goshima

Shimizu

et al. 2008

JMMP

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At first, we analyze the stress intensity factors at a crack tip of multiple kinked crack from a horizontal initial crack in a half-space due to rolling/sliding contact with frictional heat. On the basis of the results of stress intensity factors and applying the maximum energy release rate criterion to each kinks in order, the two-dimensional fatigue crack growth path are simulated, and making use of the fatigue crack growth law obtained from fatigue experimental results for a high carbon chromium bearing steel (AISI-52100), the propagation fatigue lives until the surface tribological failures are predicted due to the repetition of rolling-sliding contact. And we show that the increase of frictional coefficient, sliding/rolling ratio reduce the propagation fatigue lives, and the shortening of the depth of a horizontal initial subsurface crack reduce the propagation life and is apt to be easily induced the fatigue surface tribological failures.

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“…The frictional tangential nodal force is proportional to the normal nodal force and equals fR i . In equation (3), the product of frictional coefficient and sliding speed fv is a factor that is proportional to the heat flux and employed to measure the amount of frictional heat input. Although the current model can handle variable heat partition coefficient, β is still supposed to be constant along the contacting surfaces for simplicity.…”

Section: Heat Transfer Modelmentioning

confidence: 99%

“…Many works have been carried out in developing asperity contact models under thermoelastic conditions. Early studies were mainly focused on Hertzian-contact or single asperity-contact problems for thermal stresses [1][2][3][4][5][6][7], which indicated that the influence of temperature on contacting surfaces due to friction should be considered in the analysis of contacting bodies. Barber [2] gave resolution of steady-state thermoelastic contacts between two semi-infinite solids with some simplification assumptions.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional steady-state thermal elasto-plastic contact of rough surfaces

Liu

Xie

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part J:

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A finite-element deterministic two-dimensional thermal elasto-plastic contact model is presented in this article, which facilitates the investigation of the influence of steady-state frictional heating on contacting asperities and subsurface stress fields. This model takes into account the asperity distortion caused by the temperature variation in a tribological process, microplastic flow of surface asperities, and coupled thermo-elasto-plastic behaviour of the material, with and without considering the strain-hardening property of the material. The model is verified through the contact analysis of a rigid, isothermal cylinder with a thermally conductive, elasto-plastic plane. The maximum contact pressures increase with frictional heating. Furthermore, thermal effects on the contact pressure, real area of the contact, and average gap of a real rough surface with different frictional heat inputs under thermal elasto-plastic contact conditions are numerically investigated. It indicates that neglecting thermal effect overestimates the real area of the contact and underestimates the average gap between the contacting surfaces.

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Combined Thermal - Mechanical Effects in Frictional Sliding

Cited by 19 publications

References 0 publications

Effect of thermo-elastic deformation on lubricated point contacts

Effect of thermo-elastic deformation on lubricated point contacts

Fatigue Crack Growth Behavior of Subsurface Crack in a Semi-Infinite Body Due to Rolling-Sliding Contact

Two-dimensional steady-state thermal elasto-plastic contact of rough surfaces

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