...X. M. Liang; Y. Ding; Y. Duo; W. K. Yuan; G. F. Wang In this paper, an incremental equivalent contact model is developed for elastic-perfectly plastic solids with rough surfaces. The contact of rough surface is modeled by the accumulation of circular contacts with varying radius, which is estimated...

...G. F. Wang; X. M. Liang; D. Yan The accurate calculation of the real contact area between rough surfaces is a key issue in tribology. In this paper, based on the geometrical information of total contact area and the number of contact patches with respect to surface separation, a new method...

...Wujiu Pan; Hongshuang Li; Haoyong Qu; Liangyu Ling; Linlin Wang The contact damping between rough surfaces has an important influence on the wear, vibration, contact fatigue, and energy dissipation between interfaces. In this paper, based on contact theory, a tangential damping mathematical model...

... the influence of roughness on the performance of the seal. The choice of a deterministic approach has been made, this being justified by a review of the literature. A numerical model for the generation of random rough surfaces has been used prior to the flow model in order to give an accurate description...

... high pressure. Solid contact stiffness was predicted using a statistical rough surface contact model. Under all operating conditions, the prediction of fluid stiffness was found to be much greater than the solid contact stiffness. The total stiffness predicted by the model showed good agreement...

... model can be used to theoretically calculate the static friction coefficient. Such friction models assume that the two rough surfaces in contact are replaced with a single equivalent rough surface in contact with a smooth rigid flat surface as shown schematically in Fig. 6 . In the GW model ( 2...

...L. Li; I. Etsion; F. E. Talke A model for the contact area and static friction of nominally flat rough surfaces and rough spherical surfaces is presented. The model extends previously published models, which are limited to plasticity index values below 8, to higher plasticity index values...

...Fanming Meng; Q. Jane Wang; Diann Hua; Shuangbiao Liu The average flow model proposed by Patir and Cheng offers a great convenience for the analysis of rough surfaces in lubrication. The contact factor introduced by Wu and Zheng helps to solve a difficulty in local film evaluation using the average...

... has a great influence on the lubrication performance of misaligned journal bearings with roughness surface when the eccentricity ratio is large. Therefore, it is necessary to consider the thermal effect in analyzing the lubrication of misaligned journal bearings with roughness surface. 2 When...

...Shuyun Jiang; Yunjian Zheng; Hua Zhu A general contact stiffness model is proposed in this paper to study the contacts between rough surfaces of machined plane joints. The proposed model uses fractal geometry for surface topography description, elastic-plastic deformation of contacting asperities...

...W. Cheng; K. Farhang Approximate closed-form equations are derived for normal contact force between nominally flat rough surfaces in dry contact. The formulation is based on the asperity-level interaction in which adhesive forces between two asperities and elastic and rate-dependent forces...

... for the contact of two rough surfaces. Half-plane tangential force due to elastic-plastic contact is derived through the statistical summation of tangential force component along an arbitrary tangential direction. Two sets of equations are found. In the first set of equations the functional forms are simpler...

...Yuchuan Liu; Q. Jane Wang; Dong Zhu; Wenzhong Wang; Yuanzhong Hu This paper discussed the computational accuracy of rough-surface point-contact isothermal elastohydrodynamic lubrication (EHL) analysis by investigating the effects of differential scheme, viscosity-pressure, and shear-thinning models...

...Ali Sepehri; Kambiz Farhang In this paper we consider the contact between two rectangular rough surfaces that provide normal and tangential contact forces, as well as contact moment, to counteract the net moment imposed by the applied forces. The surfaces are permitted to develop a slight angular...

... elastoplasticity mechanical contact rough surfaces surface topography multilevel elastic-plastic contact rough surface Contact analysis is critical in understanding tribological phenomena such as friction, wear, contact fatigue, and sealing. At the microscopic level, real surfaces...

... deformation rough surfaces steel ultrasonic effects asperity creep ultrasound rough contact When stress is applied to a material, elastic and even plastic strains can appear instantly or in a relatively short time. Further deformation that occurs gradually under nominal constant stress...

..., and relative humidity are performed, respectively. The simulation results show that the interface stiffness, surface topography, and relative humidity can heavily influence the interface adhesion of rough surfaces with meniscus. To avoid the complexity of self-consistent adhesive numerical calculations...

...D. Cohen; Y. Kligerman; I. Etsion A model for elastic-plastic spherical contact of rough surfaces under combined normal and tangential loadings, with full stick contact condition, is presented. The model allows evaluation of the effect of surface roughness on the real contact area, static friction...

... distribution q ( x ) (where q ( x , y ) = f p ( x , y ) everywhere) and subtracting from it a scaled form. Hertzian contact rough surface pressure distribution tangential compliance partial slip friction mechanical contact rough surfaces 19...

...Ning Ren; Dong Zhu; W. Wayne Chen; Yuchuan Liu; Q. Jane Wang This paper reports the development of a novel three-dimensional (3D) deterministic model (3D L-EHL) for rough surface line-contact mixed-elastohydrodynamic lubrication (EHL) problems. This model is highly demanded because line contacts...