Measurements and Correlations of Slider Vibrations and Wear

[+] Author and Article Information
M. D. Bryant

Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712-1063

David York

Boeing, 13100 Space Center Blvd, Houston, TX 77059

J. Tribol 122(1), 374-380 (May 11, 1999) (7 pages) doi:10.1115/1.555363 History: Received October 23, 1998; Revised May 11, 1999
Copyright © 2000 by ASME
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Bryant,  M. D., and Lin,  J. W., 1993, “Photoelastic Visualization of Contact Phenomena Between Real Tribological Surfaces, With and Without Sliding,” J. Wear, 170, pp. 267–279.
Bryant, M. D., and Lin, J. W., 1995, “Reductions of Wear Rate and Contact Interface Observations for Carbon Samples Sliding Against Wavy and Smooth Copper Surfaces,” Proceedings, Effects of Mechanical Stiffness and Vibration on Wear, ASTM STP 1247, American Society for Testing and Materials, Philadelphia, PA, pp. 32–45.
Bryant, M. D., and Lin, J. W., 1995, “Methods and Apparatus to Reduce Wear on Sliding Surfaces,” U.S. Patent 5,466,979, issued Nov. 14, 1995 to UT-Austin.
Bryant,  M. D., Tewari,  A., and Lin,  J. W., 1995, “Wear Rate Reductions in Carbon Samples Conducting Current and Sliding Against Wavy Copper Surfaces,” IEEE Trans. Comp. Hybrids. Man. Tech. Part A, 18, No. 2, pp. 375–381.
Bryant,  M. D., Tewari,  A., and York,  D., 1998, “Effects of Micro (Rocking) Vibrations and Surface Waviness on Wear and Wear Debris,” J. Wear, 216, pp. 60–69.
Holm, R., 1958, Electric Contacts Handbook, 4th edition, Springer-Verlag, New York, pp. 252–254, 232.
Archard, J. F., 1980, “Wear Theory and Mechanisms,” Wear Control Handbook, M. B. Peterson and W. O. Winer, eds., ASME, New York, NY, pp. 35–80.
Thomson, W. T., 1972, Theory of Vibration with Applications, Prentice Hall, NJ, pp. 357.
Bryant,  M. D., 1996, “Bond Graph Models for Linear Motion Magnetostrictive Actuators,” ASME J. Dyn. Syst., Meas., Control, 118, No. 1, pp. 161–167.


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Carbon sample in holder. Clearances Cx and Cz (directed along z) permit rocking rotations θz and θx, respectively. A capacitance gauge measured slider displacements Nx,Ny, and Nz via the screw.
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Wear rate versus sliding speed, with sample to sample holder clearance (μm) a parameter for snug fit (solid curve), Cx-350 (long dashes), and Cz-450 (short dashes)
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(a) Surface profile of the circular sliding track versus distance (degrees) before any sliding. (b) Amplitudes of Fourier series harmonics (μm) versus harmonic number for the profile of (a), featuring enhanced harmonics 3 and 4.
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Displacements Ny,Nxz), and Nzx)(μm) versus time, with associated spectral density plots for the snug fit trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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Displacements Ny,Nx (θz), and Nz (θx) (μm) versus time, with associated spectral density plots, for the Cx-450 clearance trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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Displacements Ny,Nx (θz), and Nz (θx) (μm) versus time, with associated spectral density plots, for the Cx-350 clearance trial at (a) 500 rpm; (b) 1000 rpm; (c) 1500 rpm
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Kinetic energy per mass (J kg−1 ) versus speed (RPM) extracted from Figs. 5 with clearance Cz-450. The curves are total kinetic energy E (solid curve); Ex (long dashes); Ez (long-short dashes); and Ey (short dashes).
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Total kinetic energy per mass (J kg−1 ) extracted from Figs. 456, versus speed (RPM), for snug (solid curve), Cz-450 (long dashes), and Cx-350 (short dashes)
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Nondimensional difference ΔWR between Fig. 2 wear rates for snug fit and Cx-350 (triangles) and Cz-450 (open squares), versus respective nondimensional vibration energy differences ΔE extracted from Figs. 456. Numbers indicate rotor speeds (RPM). The data clusters about a regression line ΔWR=−0.12+1.02ΔE.




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