...Mingyu Zhang; Minglu Yao; Jing Wang; Yong Wan To improve mechanical efficiency, the tribological performance of short-period intermittent motion needs to be investigated. Based on the theory of thermal elastohydrodynamic lubrication (EHL) and considering the influences of rough surface, a mixed-EHL...

... conductive contact. In this work, a coupled structural–fluid theoretical model is developed for evaluating such intermittent contact breaks/gaps when two metallic rough surfaces in contact are under vibrations. The model is capable of predicting the increase in the fluid film as well as the contact...

... design faces considerable challenge to reduce friction losses, oil consumption, blow-by, and wear. Surface coatings have received great attention in applications of automotive engine components due to their unique friction properties. In this study, an elastic–plastic contact model of rough surfaces...

...Zhaoning Sun; Xiaohai Li A finite element analysis of a rigid sphere contact with a deformable elastic–plastic plat called indentation model is studied. The numerical results are applied on the rough surfaces contact of the Greenwood-Williamson (G-W) model. A series of the relationships...

... experiment. Finite element software abaqus and the user-defined element (UEL) subroutine are used to build three-dimensional rough surface elastoplastic contact models. By calculating the grinding rough surface contact in the macro-scale constitutive model based on J 2 theory and in the CMSG plasticity...

... Division of ASME for publication in the J ournal of T ribology . 10 06 2020 12 11 2020 13 11 2020 08 01 2021 fractal theory fretting wear artificial neural network rough surface abrasion adhesion contact mechanics dry friction surface fatigue and fretting Based...

...Lei-Tao Li; Xuan-Ming Liang; Yu-Zhe Xing; Duo Yan; Gang-Feng Wang The measurement of the real contact area between rough surfaces is one of the most challenging problems in contact mechanics and is of importance to understand some physical mechanisms in tribology. Based on the frustrated total...

...-dimensional linear contact mixed elastohydrodynamic lubrication model and the contact stiffness calculation method of rough surface, a method for calculating the gear meshing stiffness under mixed lubrication is proposed in this paper. According to the proposed calculation method, the effects of speed...

...Ping Zhou; Dongming Guo; Renke Kang; Zhuji Jin The average flow model offers a great convenience for the analysis of laminar flow over rough surfaces and is widely used in simulation studies. Flow factors used in the average flow model are generally expressed as a function of statistical properties...

..., at such low clearances, the topography of the air bearing surfaces also comes into question, making it important to consider both rarefaction and surface roughness effects in the air bearing design. In order to simplify the air bearing analysis of rough surfaces, averaging techniques for the lubrication...

...James White This paper describes the derivation and numerical solution of a lubrication equation appropriate for high Knudsen number flows and certain types of striated rough surfaces. The derivation begins with the compressible form of the lubrication equation together with the nonlinear series...

...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...

...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...

... 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...

...Ling He; Timothy C. Ovaert By applying the line integral of Barnett–Lothe tensors on oblique planes, the three-dimensional rough surface contact problem for a semi-infinite anisotropic elastic half-plane in contact with a rough rigid sphere is formulated. The conjugate gradient technique...

... fractals random processes rough surfaces surface roughness fractal surface characterization rough surface topography contact mechanics Fractal modeling of contacting rough surfaces emerged because there existed major inadequacy in the early theory of tribology ( 1...

...J. Jamari; M. B. de Rooij; D. J. Schipper In this paper, a theoretical and experimental investigation is presented to study the contact behavior of the plastic contact of deterministic rough surfaces. Analyses exclude bulk deformation of the rough surface and concentrate to the contact on asperity...

... , 96 , pp. 250 – 257 . Cole , S. J. , and Sayles , R. S. , 1992 , “ A Numerical Model for the Contact of Layered Elastic Bodies with Real Rough Surfaces ,” ASME J. Tribol. 0742-4787 , 114 , pp. 334 – 340 . Mao , K. , Sun , Y. , and Bell , T. , 1996...