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TECHNICAL PAPERS

Analysis of Stresses Induced by Dynamic Load Head-Disk Contacts

[+] Author and Article Information
Ta-Chang Fu, David B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Tribol 122(1), 233-237 (Jun 30, 1999) (5 pages) doi:10.1115/1.555348 History: Received February 04, 1999; Revised June 30, 1999
Copyright © 2000 by ASME
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References

Jeong,  T. G., and Bogy,  D. B., 1992, “An Experimental Study of the Parameters that Determine Slider-Disk Contacts During Dynamic Load-Unload,” ASME J. Tribol., 114, No. 3, pp. 507–514.
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Fu,  T.-C., and Bogy,  D. B., 1996, “Readback Signal Decrease due to Dynamic Load Head-Disk Contacts,” ASME J. Tribol., 118, pp. 370–375.
Ponnaganti,  V., Kane,  T. R., and White,  J. W., 1987, “Dynamics of Head-Disk Contact/Impact in Magnetic Recording,” IEEE Trans. Magn., MAG-23, No. 5, pp. 3435–3437.
Leo,  H.-L., and Sinclair,  G. B., 1991, “So How Hard Does a Head Hit a Disk?” IEEE Trans. Magn., 27, No. 6, pp. 5154–5156.
Jeong,  T. G., and Bogy,  D. B., 1993, “Dynamic Loading Impact-Induced Demagnetization in Thin Film Media,” IEEE Trans. Magn., 29, No. 6, pp. 3903–3905.
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Matsumoto, M., Iida, A., and Hamaguchi, T., 1992, “Measurement of Slider/Disk Collision Forces Using Acoustic Emission Source Wave Analysis,” Tribology and Mechanics of Magnetic Storage Systems, Vol. III, STLE special publication, SP-35, pp. 57–61.
Johnson, K. L., 1985, Contact Mechanics, Cambridge University Press, Cambridge.
Maw,  N., Barber,  J. R., and Fawcett,  J. N., 1976, “The Oblique Impact of Elastic Spheres,” Wear, 38, No. 1, pp. 101–114.
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Suk,  M., and Gillis,  D. R., 1998, “Effect of Slider Burnish on Disk Damage During Dynamic Load/Unload,” ASME J. Lubr. Technol., 120, pp. 332–338.
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Figures

Grahic Jump Location
A slider contacts the disk surface during dynamic loading
Grahic Jump Location
Laser beam configuration for spacing measurement
Grahic Jump Location
(a) slider-disk relative velocity (−vz) during the loading process measured at the slider’s corner which contacted the disk, using LDV, (b) relative velocity in the vicinity of the loading point, or the first head-disk contact point, and (c) relative spacing integrated from the LDV-measured data given in Fig. 4(b)
Grahic Jump Location
(a) maximum compression on the disk surface, and (b) the maximum impact stress and contact force during dynamic load head-disk impact. The applied head loading speed was 50 mm/s in Case 1 and 110 mm/s in Case 2.

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