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Keywords: simulation
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Journal Articles
Article Type: Research-Article
J. Tribol. July 2014, 136(3): 031602.
Paper No: TRIB-14-1026
Published Online: May 6, 2014
... formulation and Archard's wear equation in an iterative manner, was 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 were determined. It was found that the wear coefficient...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2014, 136(1): 011901.
Paper No: TRIB-13-1069
Published Online: November 18, 2013
... may be significantly different. Note that their ratio is 4 V 0 /( αV AC ). The simulations address a pemto slider illustrated in Fig. 2 . The radius, the skew angle, and the spindle speed are 25 mm, 0 deg, and 4200 rpm, respectively. Table 1 lists the flying attitudes of the slider...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2009, 131(3): 031902.
Published Online: June 15, 2009
...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...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2006, 128(4): 811–816.
Published Online: April 24, 2006
... 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...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2006, 128(3): 604–611.
Published Online: March 4, 2006
...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...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2004, 126(2): 248–257.
Published Online: April 19, 2004
...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...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2004, 126(1): 28–33.
Published Online: January 13, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2004, 126(1): 18–27.
Published Online: January 13, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2004, 126(1): 105–111.
Published Online: January 13, 2004
.... 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 Articles
Article Type: Technical Papers
J. Tribol. January 2004, 126(1): 81–91.
Published Online: January 13, 2004
.... EHL practice has proven that Hertzian pressure is the asymptote of hydrodynamic pressure when film thickness is sufficiently small (see 10 ), although molecular-dynamic simulation 19 20 suggests that some flow may still penetrate through the tiny gaps between the surfaces. As the film thickness...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2004, 126(1): 9–17.
Published Online: January 13, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2003, 125(4): 685–691.
Published Online: September 25, 2003
...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...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2003, 125(4): 713–719.
Published Online: September 25, 2003
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2001, 123(3): 444–454.
Published Online: January 4, 2001
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2001, 123(4): 777–784.
Published Online: December 8, 2000
...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...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2001, 123(4): 661–669.
Published Online: August 17, 2000
...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...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2000, 122(3): 519–523.
Published Online: September 21, 1999
.... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2000, 122(3): 633–638.
Published Online: August 31, 1999
... 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...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2000, 122(2): 450–457.
Published Online: August 24, 1999
.... Lower contact stress behind the leading edge causes asperity reexpansion leading to recreation of interasperity voids and subambient liquid pressures. A Poiseuille like in-flow of liquid from the sides of the wafer limits the value of the subambient pressure. Numerical simulations predict subambient...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2000, 122(2): 427–435.
Published Online: June 8, 1999
...Weidong Huang; David B. Bogy, Fellow ASME In solving the slider air bearing problem, both the Molecular Gas-film Lubrication (MGL) model and the Direct Simulation Monte Carlo (DSMC) model require the accommodation coefficient as input. The accommodation coefficient represents the fraction...