An Asperity Contact Model for the Slider Air Bearing-Reference-Cited by-同舟云学术

An Asperity Contact Model for the Slider Air Bearing

Published:1999-06-29 Issue:2 Volume:122 Page:436-443
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Huang Weidong¹,Bogy David B.¹,Honchi Masayuki²

Affiliation:

1. Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94710

2. Hitachi, Ltd., 2880 Kozu, Odawara-shi, Kanagawa-ken, 256 Japan

Abstract

As sliders fly closer and closer to the disks, asperity contact is inevitable due to the roughness on the sliders and the disks. A single asperity contact problem was solved using the molecular gas-film lubrication (MGL) model with the no-fly-zone (NFZ) condition, which was discovered with the direct simulation Monte Carlo method (DSMC). It shows that the MGL model can also provide bounded pressure and resultant force in the presence of contact. Moreover, the MGL results agree well with the DSMC results. A database for a single asperity contact force and moment was then created using the MGL model with the NFZ condition. This force and moment was superimposed to the air bearing force calculated by the MGL model calculated by the MGL model when the nominal plane of the slider and the disk are not in contact. The total additional air bearing force due to asperity contact was obtained. Its effect on the slider’s flying attitude was investigated and found to change the flying height and pitch angle up to 20 percent and 10 percent, respectively. [S0742-4787(00)02402-4]

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/122/2/436/5687139/436_1.pdf

Reference17 articles.

1. Anaya-Dufresne, M., and Sinclair, G. B., 1997, “On the Breakdown under Contact Conditions of Reynolds Equation for Gas Lubricated Bearings,” ASME J. Tribol., 119, pp. 71–75.

2. Huang, W., and Bogy, D. B., 1998, “An investigation of a Slider Air Bearing with an Asperity Contact by a Three-Dimensional Direct Simulation Monte Carlo Method,” IEEE Trans. Magn., 34, No. 4, pp. 1810–1812.

3. Cha, E., and Bogy, D. B., 1995, “Numerical Simulations of Slider Interaction with Multiple Asperity Using Hertzian Contact Model,” ASME J. Tribol., 117, pp. 575–579.

4. Greenwood, J. A., and Williamson, J. B. P., 1966, “Contact of Nominally Flat Surface,” Proc. R. Soc. London, Ser. A, 295, pp. 300–319.

5. Chang, W. R., Etsion, I., and Bogy, D. B., 1987, “An Elastic-Plastic Model for the Contact of Rough Surfaces,” ASME J. Tribol., 109, pp. 257–263.

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