A thermomechanical analysis is presented for a semi-infinite elastic solid sliding against a rigid, rough surface characterized by fractal geometry. A piecewise-linear distribution of the contact pressure was obtained by superposition of overlapping triangular pressure elements. The normal surface displacements due to the effects of contact pressure, shear traction, and thermoelastic distortion caused by frictional heating are incorporated in the influence coefficients of the matrix-inversion method. Results for a smooth, cylindrical surface sliding over a semi-infinite elastic solid demonstrate the accuracy of the analysis and provide reference for comparison with results obtained with the rough (fractal) surface. The effects of surface topography and interaction between neighboring asperity microcontacts on the surface and subsurface temperature rise and stress field of the elastic semi-infinite solid are discussed in the context of numerical results. The significance of frictional heating on the contact pressure, temperature rise, and stresses is interpreted in terms of the Peclet number and topography (fractal) parameters. The results provide insight into the likelihood for cracking and plastic flow at the surface due to the combined effects of mechanical and thermal surface tractions.
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April 2005
Article
Thermomechanical Analysis of Semi-infinite Solid in Sliding Contact With a Fractal Surface
Z.-Q. Gong, Graduate Student,
Z.-Q. Gong, Graduate Student
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
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K. Komvopoulos, Professor Fellow ASME
K. Komvopoulos, Professor Fellow ASME
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
Search for other works by this author on:
Z.-Q. Gong, Graduate Student
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
K. Komvopoulos, Professor Fellow ASME
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division January 14, 2004; revised manuscript received April 23, 2004. Review conducted by: R. W. Snidle (Assoc. Editor).
J. Tribol. Apr 2005, 127(2): 331-342 (12 pages)
Published Online: April 7, 2005
Article history
Received:
January 14, 2004
Revised:
April 23, 2004
Online:
April 7, 2005
Citation
Gong, Z., and Komvopoulos, K. (April 7, 2005). "Thermomechanical Analysis of Semi-infinite Solid in Sliding Contact With a Fractal Surface ." ASME. J. Tribol. April 2005; 127(2): 331–342. https://doi.org/10.1115/1.1792691
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