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Research Papers: Contact Mechanics

Simulation of Fretting Wear in Halfplane Geometries: Part 1—The Solution for Long Term Wear

[+] Author and Article Information
D. A. Hills1

Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, U.K.david.hills@eng.ox.ac.uk

A. Sackfield

School of Science and Technology, Nottingham Trent University Clifton campus, Nottingham NG11 8NS, U.K.

R. J. H. Paynter

Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, U.K.

1

Corresponding author.

J. Tribol 131(3), 031401 (May 22, 2009) (4 pages) doi:10.1115/1.3118785 History: Received July 18, 2008; Revised February 24, 2009; Published May 22, 2009

The final configuration of a cylindrical Hertzian contact, subject to oscillatory shear and undergoing wear, is studied. It is assumed that wear has proceeded for a long time, so that the final, modified contact is wholly adhered. It is shown that the extent of the final contact corresponds to that of the initial adhered region and the pressure distribution, and state of stress at the new contact edge are all derived, so that the environment in which cracks nucleate is well described.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Geometry of the (a) initial and (b) worn contact (wear shown on the halfplane)

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Figure 2

Tractions on the worn contact for a range of traction ratios. Solid lines: contact pressure. Dashed lines: shear traction. Normalized by maximum pressure at center of the unworn geometry p0.

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Figure 3

Surface profiles: ho=original punch profile, vo=unworn surface deformation, v∗=lower pressure surface deformation, vw=final worn surface deformation, and shaded region=material removed by wear

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Figure 4

Edge of adhered region, c, and maximum extent of contact during wear, â, versus traction ratio, Q/fP, for a Hertzian contact

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