Aspects Regarding the Use of Probabilistic Models for Isothermal Full Film Rough Line Contacts

Moraru, Laurentiu; Keith, Theo G.; Kahraman, Ahmet

doi:10.1080/05698190490455618

Cited by 9 publications

(9 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38–41 These models are particularly useful for treating the contact of hard materials. 27,28,42,43 For the soft materials, the deformation of the asperities is generally elastic and the original GW model provides reasonable results as documented in Kim et al., 21 Bohan et al., 22 and Guo et al. 23 Accordingly, in the current study, we utilize the GW model as an engineering approach to evaluate the behavior of surface asperities in soft EHL.…”

Section: Theorymentioning

confidence: 66%

Mixed lubrication of soft contacts: An engineering look

Masjedi

Khonsari

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

Section: Theorymentioning

confidence: 66%

Mixed lubrication of soft contacts: An engineering look

Masjedi

Khonsari

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…2. The film parameter (Ã) in equations ( 10) to (12) is the isotropic film parameter obtained from equation (9). 3.…”

Section: Film Thickness and Asperity Load Ratio Formulas Considering Surface Patternmentioning

confidence: 99%

“…3. Even though equations (10) to (12) are the results of simulations and curve fitting based on surface pattern values 1/9, 1/6, 1/3, 1, 3, 6, and 9, they may be used for any other value between 1/9 and 9. However, they might not be valid for values out of this range.…”

Section: Film Thickness and Asperity Load Ratio Formulas Considering Surface Patternmentioning

confidence: 99%

“…Majumdar and Hamrock, 9 Sadeghi and Sui, 10 and Jang and Khonsari 11 are among the researchers who utilized this method where they considered the elastic deformation of the asperities using GW-based models. Moraru et al 12 used Chang et al asperity model 13 (known as CEB) which also considers the plastic deformation of the asperities. Recently, Masjedi and Khonsari 14,15 conducted a study on line-contact EHL of rough surfaces where they derived curve-fit expressions for the film thickness, asperity load, and traction coefficient.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mixed elastohydrodynamic lubrication line-contact formulas with different surface patterns

Masjedi

Khonsari

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

The effect of surface pattern (orientation) on film thickness, asperity load ratio, and traction coefficient in line-contact EHL is studied. Numerical simulations results of the modified Reynolds—which takes into account the effect of surface roughness and its orientation—bulk deformation of the surfaces, and statistical elasto-plastic deformation of the surface asperities are presented. It is shown that surface pattern influences the behavior of lubricant flow, which affects the film thickness and the asperity load. The results of more than 2000 simulations are used to develop expressions to quantify the effect of surface roughness pattern in estimating the film thickness and the asperity load ratio. As an illustrative example, the contact in spur gear teeth is studied to show the utility of the developed formulas. Moreover, the traction behavior is investigated by utilizing a thermo-elastohydrodynamic approach and it is shown how the surface pattern affects the hydrodynamic and asperity parts of the traction coefficient.

show abstract

“…The elastic-plastic asperity contact model proposed by Chang et al 31 considered the plastic deformation of the asperities as well. Moraru et al 32 used this model to investigate the effect of surface roughness in line contact EHL. Zhao et al 33 developed a comprehensive asperity contact model which considered the elastic, plastic, and elasto-plastic deformation of the asperities.…”

Section: Introductionmentioning

confidence: 99%

A new load-sharing-based approach to model mixed-lubrication contact of spur gears

Parsa

Akbarzadeh

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

An isothermal model is developed for predicting the performance of spur gears with provision for surface roughness. For each point along the line of action of the gears, the contact of pinion and gear is replaced by that of two cylinders. The radii of cylinders and transmitted load are calculated, and lubricant film thickness as well as contribution of fluid film and asperities in carrying the total load is obtained using the Johnson’s load-sharing concept. For each asperity in contact, occurrence of elastic, plastic, and elasto-plastic deformation is investigated. To validate the analysis, the predicted film thickness and the friction coefficient are compared to published theoretical data. The results of a series of simulations presenting the effect of surface roughness, load, and speed on the friction coefficient are presented and discussed.

show abstract

Aspects Regarding the Use of Probabilistic Models for Isothermal Full Film Rough Line Contacts

Cited by 9 publications

References 39 publications

Mixed lubrication of soft contacts: An engineering look

Mixed lubrication of soft contacts: An engineering look

Mixed elastohydrodynamic lubrication line-contact formulas with different surface patterns

A new load-sharing-based approach to model mixed-lubrication contact of spur gears

Contact Info

Product

Resources

About