... exerted by the highly pressurized lubricant is crucial for the efficiency and reliability of such systems. In this study, we explore the impact of surface velocity direction and contact ellipticity on traction characteristics within EHL through numerical simulations using an elliptical EHL contact solver...

... gear pairs is tested and the influence of operation speed, design parameters on the WPL of meshing gear pairs is studied. Finally, the WPL simulation analysis of meshing gear pair is carried out. The generation mechanism of WPL is analyzed and the WPL of each meshing gear pair at different rotational...

... wear equation in an iterative manner is developed to simulate the wear process of the experiments. By matching the measured and predicted wear profiles, the wear coefficients under different operating and surface conditions are determined. It is found that the wear coefficient increases when either...

... voltage to the heater will not only produce a thermal protrusion on the slider, but also leaves a part of the AC voltage on the slider/disk interface. The voltage acts as the electrostatic force and can be used for further control of the slider, even in the drive level. Simulations show that the flying...

...Puneet Bhargava; David B. Bogy Prediction of the steady state flying height and attitude of air-bearing sliders in hard disk drives via simulations is the basis of their design process. Over the past few years air-bearing surfaces have become increasingly complex incorporating deep etches and steep...

... might fail. In this paper, a new simplified friction model was proposed based on experimental observations. The model was implemented into a L∕UL simulation code. Two cases were studied: a 10,000 rpm ∕ 84 mm server drive and a 3600 rpm ∕ 25.4 mm microdrive. The PSA and friction force effects...

...Tomoya Sakaguchi; Kazuyoshi Harada A three-dimensional dynamic simulation analysis of a tapered roller bearing was performed using commercially available software. Without cage pocket shape simplification, the dynamic motion of the cage and rollers was calculated in six degrees of freedom...

...C. H. Venner; G. Berger; P. M. Lugt By means of numerical simulations the deformation of transverse and isotropic harmonic waviness in EHL circular contacts under pure rolling has been studied in relation to the lubricant supply to the contact. In earlier work the deformation of waviness under pure...

... of real rough surfaces. The contact simulation uses an iterative elastic halfspace solution based on a variational principle. A simple modification allows also the approximative solution of elasto-plastic contact problems. The influence of different surface parameters is studied with respect to the load...

... of a dynamic contact analysis within a subsurface domain adjacent to the contact region are independent of mesh size, provided the mesh dimensions are sufficiently large such that the propagating waves reflected from the artificial boundaries do not reach the domain of interest during the analysis. Simulation...

.... Numerical simulations for a uniform layer on the surface show that a single parameter, characteristic of the inlet length of the contact in the fully flooded regime, determines the starved behavior. Film thickness measurements under starved conditions were performed to validate this theory. For a circular...

... JOURNAL OF TRIBOLOGY . Manuscript received by the Tribology Division December 11, 2002 revised manuscript received May 13, 2003. Associate Editor: A. A. Lubrecht. 11 December 2002 13 May 2003 13 01 2004 lubrication rolling hydrodynamics modelling simulation rough surfaces...

... of pattern geometry on the contact pressure distribution and subsurface stress-strain field. Three-dimensional sliding simulations were performed for lateral displacement of the indenting sphere approximately equal to two times the pad spatial periodicity. Three complete loading cycles, involving indentation...

...N. Ye, Graduate Student; K. Komvopoulos, Professor, Fellow ASME A hardness analysis based on finite element simulation results and contact constitutive models is presented for both homogeneous and layered elastic-plastic media. The analysis provides criteria for obtaining the real material hardness...

... area during sliding. The numerical simulation compares well with the experimental results. The new mechanism not only introduces an important tribological variable to forming processes, but also brings in a new concept of surface quality control for processes having a considerable sliding distance...

... into the bearing structure. Mass-conserving cavitation algorithm is applied, and the effect of variable viscosity is included in the Reynolds equation. Simulation results of the connecting rod bearing of an internal combustion engine are presented. It is shown that the predicted level of the thermal distortion...

...W. Gregory Sawyer; John A. Tichy Studies of particle flows have followed three parallel paths: (1) experiment, (2) analysis based on the assumption of a continuum, and (3) direct particle simulation. In this paper, we perform continuum and particle analyses and compare them to each other...

...Fitsum A. Tariku, Graduate Student; Robert J. Rogers, Professor Mem. ASME In many mechanical systems, the tendency of sliding components to intermittently stick and slip leads to undesirable performance, vibration, and control behaviors. Computer simulations of mechanical systems with friction...

.... The effect of surface topography on the flash temperature was examined. According to the simulation results, the surface with a longitudinal roughness produced a noticeably higher flash temperature than the surface with a transverse roughness. The simulation results also indicate that there is a significant...

... a Random Disk Surface ,” Journal of Japanese Society of Mechanical Engineers, C , 63 , pp. 2635 – 2642 . Tsuchiyama , R. , 1998 , “ Simulation of Dynamic Characteristics of Head-Disk Interface subjected to Wavy Excitation and Collision in Contact Magnetic Recording ,” Journal of Japanese...