An elastic-plastic contact analysis based on a finite element model and real surface topographies was performed to elucidate the evolution of deformation at the head-disk interface. The topographies of the head and disk surfaces were represented by an equivalent profile generated using a modified two-variable Weierstrass-Mandelbrot function, with fractal parameters determined from images of head and disk surfaces. A region of the equivalent rough surface profile was selected for analysis based on topography scale considerations and contact simulation results. The evolution of plasticity and the likelihood of cracking in the overcoat and the magnetic layer are interpreted in light of results for the subsurface von Mises equivalent stress, equivalent plastic strain, and maximum first principal stress. The finite element model provides insight into the elastic-plastic deformation behavior of the layered medium in terms of the thickness, mechanical properties, and residual stress in the carbon overcoat.
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October 2002
Technical Papers
Elastic-Plastic Finite Element Analysis for the Head-Disk Interface With Fractal Topography Description
K. Komvopoulos, Professor, Fellow ASME,
K. Komvopoulos, Professor, Fellow ASME
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
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N. Ye, Graduate Student
N. Ye, Graduate Student
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
Search for other works by this author on:
K. Komvopoulos, Professor, Fellow ASME
Department of Mechanical Engineering, University of California, Berkeley, CA 94720
N. Ye, Graduate Student
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 July 5, 2001; revised manuscript received October 30, 2001. Associate Editor: G. G. Adams.
J. Tribol. Oct 2002, 124(4): 775-784 (10 pages)
Published Online: September 24, 2002
Article history
Received:
July 5, 2001
Revised:
October 30, 2001
Online:
September 24, 2002
Citation
Komvopoulos, K., and Ye, N. (September 24, 2002). "Elastic-Plastic Finite Element Analysis for the Head-Disk Interface With Fractal Topography Description ." ASME. J. Tribol. October 2002; 124(4): 775–784. https://doi.org/10.1115/1.1467088
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