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TECHNICAL PAPERS

Use of the Inverse Approach to Investigate the Stresses in Rough Elastohydrodynamic Contacts

[+] Author and Article Information
K. Y. Li

Department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong

C. J. Hooke

School of Manufacturing and Mechanical Engineering, The University of Birmingham, Edgbaston, Birmingham, B15 2TT

J. Tribol 124(1), 109-113 (Jun 26, 2001) (5 pages) doi:10.1115/1.1398288 History: Received January 30, 2001; Revised June 26, 2001
Copyright © 2002 by ASME
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References

Hooke, C. J., and Li, K. Y., 2001, “An Inverse Approach to the Validation of Pressure Predictions in Rough Elastohydrodynamic Contacts,” ASME Paper 2001-TRIB-021.
Hooke,  C. J., and Venner,  C. H., 2000, “Surface Roughness Attenuation in Line and Point Contacts,” Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol., 214, pp. 439–444.
Johnson, K. L., 1985, Contact Mechanics, Cambridge University Press, Cambridge.

Figures

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Profiles of rough disc: (a) after manufacture; (b) after running at 900 rpm; and (c) after running 150 rpm
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Profiles of groove: (a) after manufacture; (b) after running with 238 N load; and (c) after running with 631 N load
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(a) Pressures and clearances under rough contact, 150 rpm (P=18.9,S=9.62,PHertz=0.66 GPa); and (b) pressures and clearances under grooved contact, 238 N load (P=21.1,S=10.25,PHertz=0.78 GPa)
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Elastic von Mises’ stress under the grooved surface for the pressure distribution shown in Fig. 3(b). The disc surface is at the front of the figure and the dashed surface lies at the yield strength of the material.
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von Mises’ stresses: (a) maximum of all elastic stress distributions during the goove’s passage through the contact; (b) calculated residual stress distribution; and (c) maximum of all combined stress distributions. The disc surface is at the front of the figure and the dashed surface show the yield strength of the material.
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von Mises’ stresses in rough contact (150 rpm). The values shown are the maximum for any depth below the surface
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Comparison of von Mises’ stress calculated using the deformed rough surface profile with the yield stress obtained from the Vickers hardness. Line contact. The running speed was decreased from 900 to 90 rpm.
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Comparison of the von Mises’ stress calculated using the deformed groove profile with yield stress obtained from the Vickers hardness. Point contact. The load was increased from 66 to 630 N.

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